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Articles 661 - 690 of 9776

Full-Text Articles in Veterinary Medicine

Evaluation Of Mitigation Translocation As A Management Tool To Reduce Conflicts Between Humans And American Kestrels, Brian E. Washburn Jan 2024

Evaluation Of Mitigation Translocation As A Management Tool To Reduce Conflicts Between Humans And American Kestrels, Brian E. Washburn

United States Department of Agriculture Wildlife Services: Staff Publications

Raptor‐aircraft collisions (bird strikes) pose a serious safety risk to civil aircraft. Even smaller raptors, such as American kestrels (Falco sparverius), can be problematic within airport environments. Given widespread declines in kestrel populations, public interest, logistical and financial constraints, and other factors, managing kestrels at airports presents some unique challenges. I conducted a study to determine which biological (e.g., age and sex of the bird) and logistical factors (e.g., month and translocation distance) might influence the return of American kestrels live‐captured and translocated from 42 civil airports and military airbases within the contiguous USA during 2016–2021. American kestrels …


Wildlife Monitoring With Drones: A Survey Of End Users, Raymond B. Iglay, Landon R. Jones, Jared E. Elmore, Kristine O. Evans, Sathish Samiappan, Morgan B. Pfeiffer, Brad F. Blackwell Jan 2024

Wildlife Monitoring With Drones: A Survey Of End Users, Raymond B. Iglay, Landon R. Jones, Jared E. Elmore, Kristine O. Evans, Sathish Samiappan, Morgan B. Pfeiffer, Brad F. Blackwell

United States Department of Agriculture Wildlife Services: Staff Publications

Rapid advancements in technology often yield research inquiry into novel applications and drone (i.e., unoccupied aircraft systems or UAS) applications in wildlife management are no exception. We questioned the time lag between drone‐related research and end‐user assessments. We implemented an online, cross‐sectional survey of wildlife professionals to better understand current drone use and benefits or concerns, complemented by a review of contemporary peer‐reviewed and gray literature. We found little disparity between scientific inquiry and end‐user experiences (i.e., similar trends among concerns in published literature and survey results). Exploring new (i.e., advancements in computer vision) and refining original drone applications (i.e., …


Low Secondary Risks For Turkey Vultures From A Sodium Nitrite Toxic Bait For Wild Pigs, Justin A. Foster, John C. Kinsey, Michael J. Lavelle, Kurt C. Vercauteren, Nathan P. Snow Jan 2024

Low Secondary Risks For Turkey Vultures From A Sodium Nitrite Toxic Bait For Wild Pigs, Justin A. Foster, John C. Kinsey, Michael J. Lavelle, Kurt C. Vercauteren, Nathan P. Snow

United States Department of Agriculture Wildlife Services: Staff Publications

An acute and orally‐delivered toxic bait for wild pigs (Sus scrofa) containing sodium nitrite (SN) is being developed and tested for potential registration in the U.S. We evaluated oral toxicity of SN and risk of secondary consumption in a common avian scavenger, the turkey vulture (Carthartes aura), by 1) conducting an acute oral toxicity test (LD50) for turkey vultures by oral gavage, and 2) allowing turkey vultures to feed on whole carcasses and digestive tracts of wild pigs that died from consuming SN‐laden bait. Captive tests were conducted during fall 2016 and spring 2017 in the …


A Method For Characterizing Disease Emergence Curves From Paired Pathogen Detection And Serology Data, Joshua Hewitt, Grete Wilson-Henjum, Derek T. Collins, Jourdan M. Ringenberg, Christopher A. Quintanal, Robert Pleszewski, Jeffrey C. Chandler, Thomas J. Deliberto, Kim M. Pepin Jan 2024

A Method For Characterizing Disease Emergence Curves From Paired Pathogen Detection And Serology Data, Joshua Hewitt, Grete Wilson-Henjum, Derek T. Collins, Jourdan M. Ringenberg, Christopher A. Quintanal, Robert Pleszewski, Jeffrey C. Chandler, Thomas J. Deliberto, Kim M. Pepin

United States Department of Agriculture Wildlife Services: Staff Publications

1. Wildlife disease surveillance programs and research studies track infection and identify risk factors for wild populations, humans and agriculture. Often, several types of samples are collected from individuals to provide more complete information about an animal's infection history. Methods that jointly analyse multiple data streams to study disease emergence and drivers of infection via epidemiological process models remain underdeveloped. Joint-analysis methods can more thoroughly analyse all available data, more precisely quantifying epidemic processes, outbreak status, and risks.

2. We contribute a paired data modelling approach that analyses multiple samples from individuals. We use ‘characterization maps’ to link paired data …


Comparing Efficiencies Of Population Control Methods For Responding To Introductions Of Transboundary Animal Diseases In Wild Pigs, Nathan P. Snow, Benjamin Smith, Michael J. Lavelle, Michael P. Glow, Kayleigh Chalkowski, Bruce R. Leland, Sarah Sherburne, Justin W. Fischer, Keely J. Kohen, Seth M. Cook, Hatton Smith, Kurt C. Vercauteren, Ryan S. Miller, Kim M. Pepin Jan 2024

Comparing Efficiencies Of Population Control Methods For Responding To Introductions Of Transboundary Animal Diseases In Wild Pigs, Nathan P. Snow, Benjamin Smith, Michael J. Lavelle, Michael P. Glow, Kayleigh Chalkowski, Bruce R. Leland, Sarah Sherburne, Justin W. Fischer, Keely J. Kohen, Seth M. Cook, Hatton Smith, Kurt C. Vercauteren, Ryan S. Miller, Kim M. Pepin

United States Department of Agriculture Wildlife Services: Staff Publications

Introductions of transboundary animal diseases (TADs) into free-ranging wildlife can be difficult to control and devastating for domestic livestock trade. Combating a new TAD introduction in wildlife with an emergency response requires quickly limiting spread of the disease by intensely removing wild animals within a contiguous area. In the case of African swine fever virus (ASFv) in wild pigs (Sus scrofa), which has been spreading in many regions of the world, there is little information on the time- and cost-efficiency of methods for intensively and consistently culling wild pigs and recovering carcasses in an emergency response scenario. We compared the …


Temporal And Spatial Influences On Fawn Summer Survival In Pronghorn Populations: Management Implications From Noninvasive Monitoring, Cole A. Bleke, Eric M. Gese, Juan J. Villalba, Shane B. Roberts, Susannah S. French Jan 2024

Temporal And Spatial Influences On Fawn Summer Survival In Pronghorn Populations: Management Implications From Noninvasive Monitoring, Cole A. Bleke, Eric M. Gese, Juan J. Villalba, Shane B. Roberts, Susannah S. French

United States Department of Agriculture Wildlife Services: Staff Publications

Monitoring vital rates allowsmanagers to estimate trends in growth rates of ungulate populations. However, connecting the influence of nutrition on ungulate demography is challenging. Noninvasive sampling offers a low-cost, low-effort alternative for measuring nutritional indices, allowing for an increased understanding of the mechanistic relationships between environmental factors, nutrition, and specific population vital rates. We examined the temporal influence of intrinsic and extrinsic factors on pronghorn (Antilocapra americana) fawn recruitment. We collected fresh fecal samples from adult female pronghorn in five subpopulations spanning three sampling periods associated with critical maternal life-history stages (late gestation, early lactation, breeding season) for …


Susceptibilities And Viral Shedding Of Peridomestic Wildlife Infected With Clade 2.3.4.4b Highly Pathogenic Avian Influenza Virus (H5n1), J. Jeffrey Root, Stephanie M. Porter, Julianna B. Lenoch, Jeremy W. Ellis, Angela M. Bosco-Lauth Jan 2024

Susceptibilities And Viral Shedding Of Peridomestic Wildlife Infected With Clade 2.3.4.4b Highly Pathogenic Avian Influenza Virus (H5n1), J. Jeffrey Root, Stephanie M. Porter, Julianna B. Lenoch, Jeremy W. Ellis, Angela M. Bosco-Lauth

United States Department of Agriculture Wildlife Services: Staff Publications

We tested the ability of six peridomestic wildlife species to replicate a highly pathogenic (HP) clade 2.3.4.4b AIV (H5N1) isolated in the United States during 2022. All tested species replicated and shed virus, at least to some degree. Of the six species evaluated (house sparrows (Passer domesticus), European starlings (Sturnus vulgaris), feral pigeons (Columba livia), striped skunks (Mephitis mephitis), Virginia opossums (Didelphis virginiana), and cottontails (Sylvilagus sp.)), striped skunks and Virginia opossums shed the highest viral titers of 106.3 PFU/mL and 105.0 PFU/mL, respectively. Overall, the results of this …


Chronic Wasting Disease Effects On A Breeding Season Behavior In White-Tailed Deer (Odocoileus Virginianus), Miranda Hsiang-Ning Jacobson Huang, Stephen Demarais, Bronson K. Strickland, Allan Houston, Alejandro Banda, Kurt C. Vercauteren Jan 2024

Chronic Wasting Disease Effects On A Breeding Season Behavior In White-Tailed Deer (Odocoileus Virginianus), Miranda Hsiang-Ning Jacobson Huang, Stephen Demarais, Bronson K. Strickland, Allan Houston, Alejandro Banda, Kurt C. Vercauteren

United States Department of Agriculture Wildlife Services: Staff Publications

Wildlife disease outbreaks can lead to population declines, which are usually attributed to increased direct or indirect mortality. Alternatively, behavior associated with sickness can lead to social isolation, potentially decreasing fitness of affected individuals. A useful case study to examine this dynamic is chronic wasting disease (CWD), a neurological disease of cervids, known to affect behavior and movement. In this study, we monitored scraping, a White-tailed Deer (Odocoileus virginianus; WTD) breeding season behavior, in an area of high CWD prevalence to determine if this reproductive behavior is affected by CWD. At 107 scrape sites, we detected 3,063 scrape interactions and …


Torque Teno Sus Virus 1: A Potential Surrogate Pathogen To Study Pig-Transmitted Transboundary Animal Diseases, Xiaolong Li, Brandon M. Parker, Raoul K. Boughton, James C. Beasley, Timothy J. Smyser, James D. Austin, Kim M. Pepin, Ryan S. Miller, Kurt C. Vercauteren, Samantha M. Wisely Jan 2024

Torque Teno Sus Virus 1: A Potential Surrogate Pathogen To Study Pig-Transmitted Transboundary Animal Diseases, Xiaolong Li, Brandon M. Parker, Raoul K. Boughton, James C. Beasley, Timothy J. Smyser, James D. Austin, Kim M. Pepin, Ryan S. Miller, Kurt C. Vercauteren, Samantha M. Wisely

United States Department of Agriculture Wildlife Services: Staff Publications

Understanding the epidemiology and transmission dynamics of transboundary animal diseases (TADs) among wild pigs (Sus scrofa) will aid in preventing the introduction or containment of TADs among wild populations. Given the challenges associated with studying TADs in free-ranging populations, a surrogate pathogen system may predict how pathogens may circulate and be maintained within wild free-ranging swine populations, how they may spill over into domestic populations, and how management actions may impact transmission. We assessed the suitability of Torque teno sus virus 1 (TTSuV1) to serve as a surrogate pathogen for molecular epidemiological studies in wild pigs by investigating …


Common Grackle (Quiscalus Quiscula) Predation Of A Great Lakes Piping Plover (Charadrius Melodus) Nest And Its Conservation Implications, Jade R. Arneson, Dennis A. Peloquin, Thomas G. Prestby, Sarah P. Saunders Jan 2024

Common Grackle (Quiscalus Quiscula) Predation Of A Great Lakes Piping Plover (Charadrius Melodus) Nest And Its Conservation Implications, Jade R. Arneson, Dennis A. Peloquin, Thomas G. Prestby, Sarah P. Saunders

United States Department of Agriculture Wildlife Services: Staff Publications

Common grackle (Quiscalus quiscula) was observed consuming eggs from an exclosed (protected) Great Lakes piping plover (Charadrius melodus) nest in the lower bay of Green Bay, Lake Michigan in Wisconsin, USA during June 2023. The observation, captured by a trail camera, is the first photographic documentation of grackle predation in any of the three piping plover breeding populations. This behavior adds common grackle to the suite of egg predators and has critical implications for this shorebird species, particularly in the Great Lakes region where piping plover is listed as federally endangered and common grackles are relatively …


Tracking Sero-Molecular Trends Of Swine Brucellosis In Hawai'i And The Central Pacific, Thi Hai Au La, Ian A. Mcmillan, Prashant Dahal, Andrew H. Burger, Mahdi Belcaid, Darrin M. Phelps, Samuel M. Goldstein, Vienna R. Brown, Michael H. Norris Jan 2024

Tracking Sero-Molecular Trends Of Swine Brucellosis In Hawai'i And The Central Pacific, Thi Hai Au La, Ian A. Mcmillan, Prashant Dahal, Andrew H. Burger, Mahdi Belcaid, Darrin M. Phelps, Samuel M. Goldstein, Vienna R. Brown, Michael H. Norris

United States Department of Agriculture Wildlife Services: Staff Publications

Introduction

Brucellosis is a zoonotic disease of mammals caused by bacterial species of the Brucella genus. The reservoir for disease is typically mammals, with species of Brucella found infecting amphibians, bats, and marine mammals. Brucella spp. can pass directly to humans through contact with infected animals or their products. Brucella spp. can cause chronic debilitating infections in mammals, including humans, and is associated with spontaneous abortions in infected animals, causing reduced fecundity. In Hawai‘i, terrestrial species that could harbor Brucella spp. include swine, cattle, horses, and axis deer among others. The numerous feral swine in Hawai‘i are known to carry …


Trichinella Murrelli Identified In Red Foxes (Vulpes Vulpes) In Pennsylvania, Usa, Jitender Dubey, Peter C. Thompson, Larissa S. De Araujo, Aditya Gupta, Sasha Kay, Oliver C. H. Kwok, Jaquin Battle, Kyle R. Van Why, Justin D. Brown, Benjamin Rosenthal Jan 2024

Trichinella Murrelli Identified In Red Foxes (Vulpes Vulpes) In Pennsylvania, Usa, Jitender Dubey, Peter C. Thompson, Larissa S. De Araujo, Aditya Gupta, Sasha Kay, Oliver C. H. Kwok, Jaquin Battle, Kyle R. Van Why, Justin D. Brown, Benjamin Rosenthal

United States Department of Agriculture Wildlife Services: Staff Publications

Trichinella infections have been eliminated from pork where pigs are raised in biosecure facilities, but wildlife infections persist. Trichinella murrelli is the primary zoonotic species in wild carnivores in the United States, having been identified in several species of omnivores and carnivores. Here, we document its occurrence in seven of 21 (33.3%) red foxes (Vulpes vulpes) from six counties in Pennsylvania. Encysted Trichinella juveniles were detected in muscle squashes (< 5 g samples) of all seven foxes, and in histological sections of the tongue and limb muscle of three. Juveniles from muscle squashes were pooled and tested in a multiplex PCR capable of differentiating all Trichinella species native to the USA; all samples contained only T. murrelli. This is the first identification of T. murrelli in red foxes from Pennsylvania, …


The Influence Of Social And Spatial Processes On The Epidemiology Of Environmentally Transmitted Pathogens In Wildlife: Implications For Management, Aakash Pandey, Chris Wojan, Abigail Feuka, Meggan E. Craft, Kezia Manlove, Kim M. Pepin Jan 2024

The Influence Of Social And Spatial Processes On The Epidemiology Of Environmentally Transmitted Pathogens In Wildlife: Implications For Management, Aakash Pandey, Chris Wojan, Abigail Feuka, Meggan E. Craft, Kezia Manlove, Kim M. Pepin

United States Department of Agriculture Wildlife Services: Staff Publications

Social and spatial structures of host populations play important roles in pathogen transmission. For environmentally transmitted pathogens, the host space use interacts with both the host social structure and the pathogen’s environmental persistence (which determines the timelag across which two hosts can transmit). Together, these factors shape the epidemiological dynamics of environmentally transmitted pathogens. While the importance of both social and spatial structures and environmental pathogen persistence has long been recognized in epidemiology, they are often considered separately. A better understanding of how these factors interact to determine disease dynamics is required for developing robust surveillance and management strategies. Here, …


Bayesian Integrated Species Distribution Models For Hierarchical Resource Selection By A Soaring Bird, Ryo Ogawa, Guiming Wang, L. Wes Burger, Bronson Strickland, J. Brian Davis, Fred L. Cunningham Jan 2024

Bayesian Integrated Species Distribution Models For Hierarchical Resource Selection By A Soaring Bird, Ryo Ogawa, Guiming Wang, L. Wes Burger, Bronson Strickland, J. Brian Davis, Fred L. Cunningham

United States Department of Agriculture Wildlife Services: Staff Publications

Migratory birds exhibit seasonal geographic range (hereafter, range) dynamics during the annual cycle. Few studies have examined how migratory birds select their habitats for range occupancy at the species level and space use at the individual level simultaneously. We hypothesized that environmental variables directly related to fitness components would affect the range occupancy probabilities of migrants, whereas environment variables related to movements and flights would affect the space use intensities of migrants. We built Bayesian integrated species distribution models (ISDMs) to evaluate the effects of climate conditions, wind conditions, and landcover compositions on the seasonal range dynamics of American white …


Agricultural And Ecological Resources Safeguarded By The Prevention Of Wild Pig Population Expansion, Colin Jareb, Kim M. Pepin, Ryan S. Miller, Stephanie A. Shwiff, Sophie C. Mckee Jan 2024

Agricultural And Ecological Resources Safeguarded By The Prevention Of Wild Pig Population Expansion, Colin Jareb, Kim M. Pepin, Ryan S. Miller, Stephanie A. Shwiff, Sophie C. Mckee

United States Department of Agriculture Wildlife Services: Staff Publications

Wild pigs (Sus scrofa) are one of the most destructive invasive species in the United States, known for causing extensive damage to agricultural commodities, natural resources, and property, and for transmitting diseases to livestock. Following the establishment of the National Feral Swine Damage Management Program (NFSDMP) in 2014, the expansion of wild pig populations has been successfully slowed. This paper combines two modeling approaches across eight separate models to characterize the expansion of wild pig populations in the absence of intervention by the NFSDMP and forecasts the value of a subset of resources safeguarded from the threat of …


Raccoon Density Estimation From Camera Traps For Raccoon Rabies Management, Amy J. Davis, Wesley C. Dixon, Richard B. Chipman, Amy T. Gilbert, Jacob E. Hill, James C. Beasley, Olin E. Rhodes Jr., Guha Dharmarajan Jan 2024

Raccoon Density Estimation From Camera Traps For Raccoon Rabies Management, Amy J. Davis, Wesley C. Dixon, Richard B. Chipman, Amy T. Gilbert, Jacob E. Hill, James C. Beasley, Olin E. Rhodes Jr., Guha Dharmarajan

United States Department of Agriculture Wildlife Services: Staff Publications

Density estimation for unmarked animals is particularly challenging, yet density estimates are often necessary for effective wildlife management. Raccoons (Procyon lotor) are the primary terrestrial wildlife reservoir for Lyssavirus rabies within the United States. The raccoon rabies variant (RRVV) is actively managed at landscape scales using oral rabies vaccination (ORV) within the eastern United States. To effectively manage RRVV, it is important to know the density of raccoons to appropriately scale the density of ORV baits distributed on the landscape. We compared methods to estimate raccoon densities from camera‐trap data versus more intensive capture‐mark‐recapture (CMR) estimates across 2 …


Surveillance Of Highly Pathogenic Avian Influenza Virus In Wild Canids From Pennsylvania, Usa, Kevin D. Niedringhaus, Taylor C. Chan, Ashley Mcdowell, Lauren Mxwell, Madison Stevens, Lane Potts, Erica Miller, Eman Anis, Kyle Van Why, Thomas Keller, David Stallknecht, Rebecca L. Poulson, Kaitlyn Bahrs, Justin D. Brown Jan 2024

Surveillance Of Highly Pathogenic Avian Influenza Virus In Wild Canids From Pennsylvania, Usa, Kevin D. Niedringhaus, Taylor C. Chan, Ashley Mcdowell, Lauren Mxwell, Madison Stevens, Lane Potts, Erica Miller, Eman Anis, Kyle Van Why, Thomas Keller, David Stallknecht, Rebecca L. Poulson, Kaitlyn Bahrs, Justin D. Brown

United States Department of Agriculture Wildlife Services: Staff Publications

The avian influenza virus is a global pathogen with significant health and economic implications. While primarily a pathogen of wild and domestic birds, recent outbreaks of the H5N1 highly pathogenic avian influenza virus (HPAIV) clade 2.3.4.4b have caused mortality in a wide variety of mammals, including members of the Canidae family, on multiple continents. Despite sporadic mortality events globally, the epidemiology and pathobiology of H5N1 HPAIV in wild canids remains poorly defined. During 2022–2024, 41 wild canid carcasses (diagnostic cases), including 23 red foxes and 18 gray foxes, were tested for the influenza A virus (IAV) via PCR, with five …


Rabies, Amy T. Gilbert, Christine Ellis Jan 2024

Rabies, Amy T. Gilbert, Christine Ellis

United States Department of Agriculture Wildlife Services: Staff Publications

Illustrated fact sheet on rabies.


Evaluating The Efficacy Of An Early Vaccination Strategy After Farrowing Using A Modified Live Prrs Vaccine And Post-Weaning Challenge With Thai Hp-Prrs, Apichart Prapattanakullawong Jan 2024

Evaluating The Efficacy Of An Early Vaccination Strategy After Farrowing Using A Modified Live Prrs Vaccine And Post-Weaning Challenge With Thai Hp-Prrs, Apichart Prapattanakullawong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Porcine reproductive and respiratory syndrome virus (PRRSV) is a major pathogen responsible for substantial economic losses in the global swine industry, adversely affecting both reproductive and respiratory health. In Thailand, early PRRSV infections in suckling and nursery pigs are commonly observed, necessitating the implementation of early vaccination strategies. However, early vaccination in young piglets has been controversial due to concerns about interfering maternal-derived antibodies (MDA) and the competency of the piglets' immune system. The objective of this study is to evaluate the efficacy of a modified-live virus (MLV) PRRS vaccination in early-age piglets from PRRSV-positive farms by assessing immune responses …


Genotypic Characterization And Amr Risk Assessment Of Esbl- Producing And Fluoroquinolone-Resistant Salmonella Spp. From Pork Collected In Bangkok, Thawanrut Kiatyingangsulee Jan 2024

Genotypic Characterization And Amr Risk Assessment Of Esbl- Producing And Fluoroquinolone-Resistant Salmonella Spp. From Pork Collected In Bangkok, Thawanrut Kiatyingangsulee

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to 1) determine the prevalence of ESBL-producing and fluoroquinolone-resistant Salmonella in pork, 2) investigate their genomic characteristics, and 3) estimate the risk of consumer exposure. Pork samples were collected from 58 markets across 19 districts in Bangkok. The study focused on third-generation cephalosporin resistance mediated by ESBLs and fluoroquinolone resistance, representing horizontal and vertical gene transfer, respectively. Out of 793 pork samples, 339 (42.8%) were positive for Salmonella, yielding 531 isolates from 33 serotypes. The most common were Salmonella Rissen (22.6%), Sinstorf (16.8%), and Derby (10.2%). Antimicrobial susceptibility testing showed 28.2% of isolates were ESBL producers and …


Efficacy Of Cell-Free Supernatants Based Nano-Application From Thai Probiotic Bacteria As An Alternative Preservative In Meat Against Foodborne Pathogens, Thin Zar Soe Jan 2024

Efficacy Of Cell-Free Supernatants Based Nano-Application From Thai Probiotic Bacteria As An Alternative Preservative In Meat Against Foodborne Pathogens, Thin Zar Soe

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study evaluates whether the use of cell-free supernatants (CFS) derived from Thai probiotic bacteria as natural preservatives in meat products, provides a safer alternative to chemical preservatives. The objectives include developing a nano-encapsulation technique to enhance the stability and efficacy of CFS, and assessing the effectiveness of nano-encapsulated CFS (Nano-CFS) in maintaining meat safety and quality during storage and evaluating the antibacterial efficacy of CFS and (Nano-CFS) against common foodborne pathogens, determining the minimal inhibitory and bactericidal concentrations (MIC and MBC). The CFS was prepared from the Thai probiotic strains. Antibacterial activity was determined using agar well diffusion and …


Genomics Approach For Ex Situ Conservation Of Asian King Vulture And Steppe Eagle, Wannapol Buthasane Jan 2024

Genomics Approach For Ex Situ Conservation Of Asian King Vulture And Steppe Eagle, Wannapol Buthasane

Chulalongkorn University Theses and Dissertations (Chula ETD)

The Asian king vulture (Sarcogyps calvus, AKV), an ecologically important forest scavenger, is an Old World vulture in the family Accipitridae. It is classified as a critically endangered species, with no genomic data currently available. This dissertation aimed to assemble a high-quality reference genome to enhance understanding of its genetic background, scavenging adaptations and genetic diversity within Thailand’s captive population. A hybrid genome assembly combining Pacific Biosciences (PacBio) long-read and MGI short-read sequencing was generated from DNA extracted from the whole blood of a female individual. Comparative genomic analyses with New World vultures (NWVs) and other Accipitridae species revealed distinct …


Ultrasonographic Renal Cortical Thickness To Abdominal Aorta Internal Diameterin Healthy Cats And Chronic Kidney Disease Cats, Run Sakulsirajit Jan 2024

Ultrasonographic Renal Cortical Thickness To Abdominal Aorta Internal Diameterin Healthy Cats And Chronic Kidney Disease Cats, Run Sakulsirajit

Chulalongkorn University Theses and Dissertations (Chula ETD)

Chronic kidney disease (CKD) is a one of the most common disorder in cats, particularly in aging populations. Early detection and accurate monitoring are crucial for effective disease management. This study aims, first, to evaluate the ultrasonographic parameters, including renal cortical thickness (RCT), medullary thickness (MT), renal length (RL), abdominal aorta diameter (Ao) and ratios, including RCT/Ao, RCT/MT, RCT/RL, MT/Ao and RL/Ao compared between clinically healthy and CKD cats. Second, to evaluate the correlations of ultrasonographic parameters with blood renal functions including blood urea nitrogen (BUN), creatinine (Cr) and symmetric dimethylarginine (SDMA) and also correlation with age, body weight (BW) …


Improving Antimicrobial Susceptibility Testing Of Arcobacter Butzleri: Comparative Methods And Epidemiological Cut-Off Value (Ecoff) Determination, Myzatul Hanis Zahiyah Yusof Jan 2024

Improving Antimicrobial Susceptibility Testing Of Arcobacter Butzleri: Comparative Methods And Epidemiological Cut-Off Value (Ecoff) Determination, Myzatul Hanis Zahiyah Yusof

Chulalongkorn University Theses and Dissertations (Chula ETD)

Arcobacter butzleri is an emerging zoonotic pathogen associated with gastrointestinal illnesses in humans, yet standardized antimicrobial susceptibility testing (AST) methods and interpretive breakpoints for this microorganism remain unavailable. Broth microdilution, despite being endorsed by the CLSI-VAST subcommittee, is often impractical in several laboratories. Therefore, this study aimed to evaluate agar dilution as a more feasible alternative to broth microdilution. A total of 415 A. butzleri isolates from various meat sources in Bangkok, Thailand were confirmed by PCR and tested against ciprofloxacin, erythromycin, gentamicin, and tetracycline. AST was conducted using broth microdilution under aerobic conditions for 24 hours as the reference …


Complete Genome Analysis Of African Swine Fever Virus Strains In Thailand, Anwesha Prakash Jan 2024

Complete Genome Analysis Of African Swine Fever Virus Strains In Thailand, Anwesha Prakash

Chulalongkorn University Theses and Dissertations (Chula ETD)

African Swine Fever Virus (ASFV) is a large double-stranded DNA virus responsible for the highly contagious and lethal African Swine Fever (ASF), affecting the global porcine industry. The virus has a genome length of 170-194 kb and is broadly categorized into the left variable region (LVR), the right variable region (RVR), and the central conserved region (CCR). In Thailand, ASF was officially confirmed in January 2022 and identified as genotype II, which is primarily responsible for the current Eurasian swine pandemic. To date, due to the absence of a globally accepted vaccine against ASFV, culling and quarantine remain the primary …


Canine Cricoid Cartilage And Tracheal Dimensions Observed On Computed Tomographic Image, Tanya Kasemsuwan Jan 2024

Canine Cricoid Cartilage And Tracheal Dimensions Observed On Computed Tomographic Image, Tanya Kasemsuwan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Inhalation anesthesia is commonly used for general anesthesia due to its effectiveness. During the procedure, an endotracheal tube (ET) is essential for maintaining anesthetic depth, delivering anesthetic agents, and providing sufficient oxygen to reduce the risks of morbidity and mortality. Mispositioning and inappropriate ET size can lead to complications like hypoxemia, hypercapnia, and airway trauma. Commercially available ET tubes are designed for general use and are not specifically optimized for different cephalic types, leading to the objective of this study, which was to investigate the differences in anatomical dimensions of the cricoid cartilage and trachea and ET location among brachycephalic, …


Determination Of Nutrients Digestibility In Commercial Dry Dog Food Containing Various Protein Sources, Phuong Anh Ta Jan 2024

Determination Of Nutrients Digestibility In Commercial Dry Dog Food Containing Various Protein Sources, Phuong Anh Ta

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study evaluated the nutritional adequacy and digestibility of commercial dry dog foods formulated with different protein sources (animal versus plant) and market tiers (premium versus economy). Eight commercial dog foods were analyzed for nutrient composition and amino acid profiles using proximate analysis and high-performance liquid chromatography (HPLC). Of these, four representative products were selected to assess digestibility through in vivo total fecal collection in Beagle dogs and in vitro digestion assays. All products exceeded 18% crude protein (the minimum crude protein requirement by AAFCO). However, deficiencies were examined in essential amino acids, particularly leucine, isoleucine, methionine, lysine, tryptophan, valine …


The Comprehensive Study Of The Reproductive Cycle With A Special Focus On The Vestibular Microbiome In Captive Asian Elephants (Elephas Maximus), Yuqing Yang Jan 2024

The Comprehensive Study Of The Reproductive Cycle With A Special Focus On The Vestibular Microbiome In Captive Asian Elephants (Elephas Maximus), Yuqing Yang

Chulalongkorn University Theses and Dissertations (Chula ETD)

This dissertation aimed to advance the understanding of reproductive physiology and health in Asian elephants, providing critical insights and innovative methodologies for reproductive management. Chapter II established a foundational framework for normal reproductive cycling, detailing the luteal and follicular phases, and introduced a simplified, practical body condition score (BCS) method as a diagnostic tool for assessing general health and welfare. It highlighted unresolved reproductive issues, such as abnormal cycling, and revealed that progesterone peaks, with the majority (53.57%), and the onset of the follicular phase predominantly occurred during the rainy season. Monitoring ovulation and maintaining a standard BCS during the …


Molecular Investigation And Genetic Characterization Of Hemotropic Mycoplasma Spp. And Potential Role Of Flea Vectors In Goats In Thailand, Muhammad Shair Zaman Ghauri Jan 2024

Molecular Investigation And Genetic Characterization Of Hemotropic Mycoplasma Spp. And Potential Role Of Flea Vectors In Goats In Thailand, Muhammad Shair Zaman Ghauri

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to investigate the identification of flea species infesting goats and to study the molecular prevalence and genetic characterization of hemotropic mycoplasmas in goats and fleas. A total of 500 blood and 79 flea samples were collected from goat farms across seven provinces in Thailand between January 2017 and October 2023. Among the 500 goats examined, 6.6% were infested with fleas, which were morphologically identified and molecularly characterized using mitochondrial (cox-I, cox-II) and nuclear (ITS1, EF-1α) markers as Ctenocephalides orientis. Additionally, 14,315 bp fragment of the C. orientis mitochondrial genome was analyzed, revealing a close evolutionary relationship with …


Detection Of Brafv595e Gene Of Canine Urothelial Carcinoma Using Real-Time Pcr, Monticha Kitnitchee Jan 2024

Detection Of Brafv595e Gene Of Canine Urothelial Carcinoma Using Real-Time Pcr, Monticha Kitnitchee

Chulalongkorn University Theses and Dissertations (Chula ETD)

Canine urothelial carcinoma (CaUC) is the most common malignant tumor of the urinary bladder in dogs. This cancer has aggressive behavior and it is challenge for diagnosis. Most CaUC cases are diagnosed from the obvious clinical signs as the late to advance stage. In addition, therapeutic strategies for this stage are almost non-responsive for the eradication and prevention of recurrent disease. Therefore, non-invasive early diagnosis is required for urothelial carcinomas in both human and animals including dogs, which have similar cancer biology to human. This study aimed to evaluate diagnostic accuracy by BRAFV595E detection using real-time PCR (qPCR) from various …