Veterinary Medicine Commons^™

Geospatial Analysis Of Rickettsial Species, Amy Frank

Animal Science Undergraduate Honors Theses

Rickettsia species are obligate intracellular, arthropod-borne bacteria with a potential to cause multiple diseases including Rocky Mountain spotted fever (RMSF). Fleas, mites, and ticks serve as vectors for Rickettsia, but ticks are the primary vector of interest. RMSF and other rickettsial diseases have continued to gain importance in both human and veterinary medicine as RMSF is the most common tick-borne disease within the United States according to the Lyme and Tick-Borne Disease Research Center. A statewide citizen science project was utilized to determine the prevalence of Spotted Fever Group (SFG) Rickettsia in Arkansas. This project yielded results in 64 …

A Review Of Osteoarthritis, Madelin Brooke Session

Undergraduate Honors Capstone Projects

Osteoarthritis is a degenerative joint disease which plagues many older animals and humans. It is a disease that is characterized by the degeneration of joint cartilage, inflammation, as well as chronic pain and stiffness that results from this disorder. Unfortunately, most of the treatments for this painful and chronic disease mostly involve pain management and temporary relief strategies. These strategies usually include pain medication, non-steroidal anti-inflammatory drugs, injectable lubricants, as well as surgical techniques. However, because these treatments are just temporary fixes meant for pain management and to improve quality of life they must continue throughout the remainder of the …

Young Germ Cell Depleted Ovaries In Post-Reproductive Mice And Its Effects On Immune Function, Mckenna Walters

Undergraduate Honors Capstone Projects

It has previously been shown that young, cycling ovarian transplantation in aged female mice increased the general health and life span in regard to their post-reproductive health. It has further been hypothesized that this enhancement of health is directly influenced by the ovarian somatic cells. To address this hypothesis, transplants of young germ cell depleted and germ cell containing ovaries were performed on female mice. The purpose of this study is to continue to discern the reproductive influence on aging health, specifically in the area of immunological well-being. Control group mice were separated by age and treatment mice were subsequently …

Preparation And Evaluation Of Single-Stranded Dna Aptamer-Based Immunological Adjuvant In Broiler Chickens, Adil Sabr Al-Ogaili

Graduate Theses and Dissertations

Mineral oils and metal salts are commonly used as adjuvants to enhance acquired immunity. Recently, monoclonal antibodies (MAbs) and recombinant peptides agonist CD40 receptor have shown remarkable promise for induction of rapid and robust immune responses. Limitations of this approach MAb production costs and multiple administrations due to anti-MAb immune responses. Here we demonstrate the development of a unique and sophisticated DNA aptamer-based alternative for CD40-directed delivery of universal antigens as an alternative in chickens, and potentially other vertebrate species. This receptor, expressed by antigen-presenting cells, acts as a costimulatory molecule for activated T helper lymphocytes. After initially selecting for …

Evaluation Of Casein Hydrolysate As An Alternative Dry-Off Treatment And Milk Quality Management Tool In Dairy Cows, Justine Elena Britten

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mastitis, an infection of the mammary gland, is the most common and expensive animal health problem for the dairy industry and affects every dairy farm to some degree. This disease complex is painful for dairy cows, increases the on-farm use of antibiotics, presents a threat to milk quality and is a waste of time, money and milk production. Each year, the dairy industry loses as much as a billion dollars to mastitis.

Many cows will experience mastitis at least once during a lactation cycle and some animals will develop recurring mastitis episodes in a single mammary quarter. These mastitic quarters …

Male Reproductive Infection And Sexual Transmission Of Zika Virus In An Immunocompromised Mouse Model, Chad S. Clancy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Zika virus (ZIKV) is a sexually transmitted viral infection most frequently transmitted by mosquitoes. The source of infectious virions in the male reproductive tract has yet to be elucidated. The goals of the studies included developing and characterizing two mouse models for reproductive transmission studies and demonstration of sexual transmission of virus via artificial insemination. The mouse strains used in the study lacked receptors to interferon molecules, key signaling proteins of the host immune response. Inflammation severity was assessed during acute disease, 5-11 days after infection using a novel histopathology grading system. ZIKV proteins and genome were initially detected in …

Systematic Review Of Gastrointestinal Nematodes Of Horses From Australia, Muhammad A. Saeed, Ian Beveridge, Ghazanfar Abbas, Anne Beasley, Jenni Bauquier, Edwina Wilkes, Caroline Jacobson, Kris J. Hughes, Charles El-Hage, Ryan O'Handley, John Hurley, Lucy Cudmore, Peter Carrigan, Lisa Walter, Brett Tennent-Brown, Martin K. Nielsen, Abdul Jabbar

Maxwell H. Gluck Equine Research Center Faculty Publications

Background: Equine gastrointestinal nematodes (GINs) have been the subject of intermittent studies in Australia over the past few decades. However, comprehensive information on the epidemiology of equine GINs, the efficacy of available anthelmintic drugs and the prevalence of anthelmintic resistance (AR) in Australasia is lacking. Herein, we have systematically reviewed existing knowledge on the horse GINs recorded in Australia, and main aspects of their pathogeneses, epidemiology, diagnoses, treatment and control.

Methods: Six electronic databases were searched for publications on GINs of Australian horses that met our inclusion criteria for the systematic review. Subsets of publications were subjected to review epidemiology, …

Development And Evaluation Of A One-Step Multiplex Real-Time Taqman® Rt-Qpcr Assay For The Detection And Genotyping Of Equine G3 And G14 Rotaviruses In Fecal Samples, Mariano Carossino, Maria E. Barrandeguy, Erdal Erol, Yanqiu Li, Udeni B. R. Balasuriya

Veterinary Science Faculty Publications

Background: Equine rotavirus A (ERVA) is the leading cause of diarrhea in neonatal foals and has a negative impact on equine breeding enterprises worldwide. Among ERVA strains infecting foals, the genotypes G3P[12] and G14P[12] are the most prevalent, while infections by strains with other genomic arrangements are infrequent. The identification of circulating strains of ERVA is critical for diagnostic and surveillance purposes, as well as to understand their molecular epidemiology. Current genotyping methods available for ERVA and rotaviruses affecting other animal species rely on Sanger sequencing and are significantly time-consuming, costly and labor intensive. Here, we developed the first one-step …

Board Invited Review: Prospects For Improving Management Of Animal Disease Introductions Using Disease-Dynamic Models, Ryan S. Miller, Kim M. Pepin

United States Department of Agriculture Wildlife Services: Staff Publications

Management and policy decisions are continually made to mitigate disease introductions in animal populations despite often limited surveillance data or knowledge of disease transmission processes. Science-based management is broadly recognized as leading to more effective decisions yet application of models to actively guide disease surveillance and mitigate risks remains limited. Disease-dynamic models are an efficient method of providing information for management decisions because of their ability to integrate and evaluate multiple, complex processes simultaneously while accounting for uncertainty common in animal diseases. Here we review disease introduction pathways and transmission processes crucial for informing disease management and models at the …

Assessing The Nutritional Value Of Black Soldier Fly Larvae (Hermetia Illucens) Used For Reptile Foods, Kimberly L. Boykin

LSU Master's Theses

Black soldier fly (BSF) larvae have been studied extensively in animal feed production, but there is limited research for non-production species, such as reptiles, despite their popularity as a calcium-rich feeder insect. The goals of this thesis were to determine the nutritive value of BSF larvae for a lizard species and as an ingredient in a diet formulated for snakes.

BSF larvae are deficient in fat soluble vitamins (A, D, and E). Using vitamin A as a test nutrient, several factors were identified that affect the success and consistency of gut loading. Based on the results, the following gut loading …

The One Health Approach To Toxoplasmosis: Epidemiology, Control, And Prevention Strategies, A. Alonso Aguirre, Travis Longcore, Michelle Barbieri, Haydee Dabritz, Dolores Hill, Patrice N. Klein, Christopher Lepczyk, Emily L. Lilly, Rima Mcleod, Judith Milcarsky, Caroline E. Murphy, Chunlei Su, Elizabeth Vanwormer, Robert Yolken, Grant C. Sizemore

School of Veterinary and Biomedical Sciences: Faculty Publications

One Health is a collaborative, interdisciplinary effort that seeks optimal health for people, animals, plants, and the environment. Toxoplasmosis, caused by Toxoplasma gondii, is an intracellular protozoan infection distributed worldwide, with a heteroxenous life cycle that practically affects all homeotherms and in which felines act as definitive reservoirs. Herein, we review the natural history of T. gondii, its transmission and impacts in humans, domestic animals, wildlife both terrestrial and aquatic, and ecosystems. The epidemiology, prevention, and control strategies are reviewed, with the objective of facilitating awareness of this disease and promoting transdisciplinary collaborations, integrative research, and capacity building among universities, …

Transposon Mutagenesis In Mycobacterium Avium Subspecies Paratuberculosis, John P. Bannantine, Denise K. Zinniel, Raul G. Barletta

School of Veterinary and Biomedical Sciences: Faculty Publications

While transposon mutagenesis has been developed for Mycobacterium avium subspecies paratuberculosis (Map), relatively few laboratories have adopted this important genetic tool to examine gene function and essentiality. Here we describe the construction of a Map transposon library using the Himar1 mariner transposon, but concepts can also be applied to the Tn5367 transposon, which has also been used by our group. Delivery of the transposon is by a temperature-sensitive phagemid, ϕMycoMarT7, and plating transductants requires patience and specialized media due to length of incubation required to observe colonies. Several transposon mutants obtained from these libraries have been tested in vaccine and …

Environmental Transmission Of Toxoplasma Gondii: Oocysts In Water, Soil And Food, Karen Shapiro, Lillian Bahia-Oliveira, Brent Dixon, Aurélien Dumètre, Luz A. De Wit, Elizabeth Vanwormer, Isabelle Villena

School of Veterinary and Biomedical Sciences: Faculty Publications

Toxoplasma gondii is a zoonotic protozoan parasite that can cause morbidity and mortality in humans, domestic animals, and terrestrial and aquatic wildlife. The environmentally robust oocyst stage of T. gondii is fundamentally critical to the parasite's success, both in terms of its worldwide distribution as well as the extensive range of infected intermediate hosts. Despite the limited definitive host species (domestic and wild felids), infections have been reported on every continent, and in terrestrial as well as aquatic environments. The remarkable resistance of the oocyst wall enables dissemination of T. gondii through watersheds and ecosystems, and long-term persistence in diverse …

Can Assisted Reproductive Technologies Help Conserve 300 Million Years Of Evolution? A First Attempt At Developing These Technologies For Male Reptiles, Sean M. Perry

LSU Doctoral Dissertations

Biodiversity loss is the most critical environmental problem threatening ecosystem, animal, and human health today. Increases in extinction rates have been observed over the past 50 years, with reptile losses occurring twelve times faster than traditional extinction rates. This demonstrated biodiversity loss is secondary to climate change, habitat destruction, infectious disease, invasive species, poaching, and unsustainable trade. Approximately 20% of all reptiles are threatened with extinction and population declines are approaching rates similar to the current amphibian extinction crisis. Preventing the extinction of reptiles will require humans to acknowledge these losses and develop plans to preserve these evolutionary sentinel species. …

Improving Risk Assessment Of The Emergence Of Novel Influenza A Viruses By Incorporating Environmental Surveillance, Kim M. Pepin, Matthew W. Hopken, Susan A. Shriner, Erica Spackman, Zaid Abdo, Colin Parrish, Steven Steven, James O. Lloyd-Smith, Antoinette J. Piaggio

United States Department of Agriculture Wildlife Services: Staff Publications

Reassortment is an evolutionary mechanism by which influenza A viruses (IAV) generate genetic novelty. Reassortment is an important driver of host jumps and is widespread according to retrospective surveillance studies.However, predicting the epidemiological risk of reassortant emergence in novel hosts from surveillance data remains challenging. IAV strains persist and cooccur in the environment, promoting co-infection during environmental transmission. These conditions offer opportunity to understand reassortant emergence in reservoir and spillover hosts. Specifically, environmental RNA could provide rich information for understanding the evolutionary ecology of segmented viruses, and transform our ability to quantify epidemiological risk to spillover hosts. However, significant challenges …

Canine Dystocia In 50 Uk First-Opinion Emergency Care Veterinary Practices: Clinical Management And Outcomes, Dan G. O'Neill, Aoife M. O'Sullivan, Erin A. Manson, David B. Church, Paul Mcgreevy, Amanda K. Boag, Dave C. Brodbelt

Natology Collection

Canine dystocia is a relatively common veterinary presentation. First opinion emergency care clinical data from 50 Vets Now clinics across the UK were used to explore dystocia management and outcomes in bitches. Caesarean section (CS) was performed on 341/701 (48.6 per cent (95 per cent CI 44.9 to 52.4)) of dystocia cases. The bulldog (OR 7.60, 95 per cent CI 1.51 to 38.26, P=0.014), Border terrier (OR 4.89, 95 per cent CI 0.92 to 25.97, P=0.063) and golden retriever (OR 4.07, 95 per cent CI 0.97 to 17.07, P=0.055) had the highest odds of CS among dystocic bitches compared with …

That Sheep May Safely Graze: Rebuilding Animal Health Care In War-Torn Afghanistan, David M. Sherman

Purdue University Press Book Previews

The very mention of Afghanistan conjures images of war, international power politics, the opium trade, and widespread corruption. Yet the untold story of Afghanistan’s seemingly endless misfortune is the disruptive impact that prolonged conflict has had on ordinary rural Afghans, their culture, and the timeless relationship they share with their land and animals. In rural Afghanistan, when animals die, livelihoods are lost, families and communities suffer, and people may perish. That Sheep May Safely Graze details a determined effort, in the midst of war, to bring essential veterinary services to an agrarian society that depends day in and day out …

A Simple And Rapid Method For The Extraction Of Genomic Dna From Piglet Tails Without Using Proteinase K, Nathamon Yimpring, Komkrich Teankum, Prapat Suriyaphol, Nutthee Am-In, Gunnaporn Suriyaphol

The Thai Journal of Veterinary Medicine

Genomic DNA (gDNA) is a prerequisite for genomic research. However, the collection of blood samples from young animals for gDNA extraction is not practical. Since piglet tail docking is routinely performed in pig farms to prevent injury from tail biting, docking tails served as a practical source for gDNA in piglets. However, extraction of gDNA from piglet tails is difficult because of inelasticity and cartilage. The purpose of this study was to develop a rapid and simple method of isolating gDNA from piglet tails for downstream molecular purpose. Chopped piglet tails with ceramic beads in lysis buffer were vortex-homogenized prior …

Surgical Removal And Recurrence Of Leiomyosarcoma In A King Cobra, Ophiophagus Hannah, Taksa Vasaruchapong, Panithi Laoungbua, Lawan Chanhome, Wijit Banlunara

The Thai Journal of Veterinary Medicine

An adult male wild-caught king cobra, Ophiophagus hannah, of unknown age was raised in captivity for seven years. The snake showed swelling at the caudal third of the body. Physical examination revealed an approximately 15x10 cm firm mass in coelomic cavity. Radiography showed soft tissue density causing complete obstruction of intestinal tract. The mass was surgically removed and diagnosed as leiomyosarcoma. The snake was monitored and the mass recurred two months post-surgery. A second surgical exploration showed severe adhesion of the mass to dorsal aorta, intercostal muscle, ribs and stomach. The snake was euthanized and the recurrent masses were diagnosed …

Accuracy Of Portable Human Glucose Meter (Accu-Chek® Performa) For Blood Glucose Measurement In Newborn Piglets, Morakot Nuntapaitoon, Sujin Sirisawadi, Sariya Asawakarn, Padet Tummaruk

The Thai Journal of Veterinary Medicine

Blood glucose concentration is a significant postnatal survival indicator in newborn piglets. The standard procedure is difficult to perform under field conditions and requires a long period of time for processing. Portable glucose meters have been invented to yield a faster result and utilize a small blood sample. The present study aims to compare glucose concentration mea s ur ed using a portable human glucose meter ( Accu- chek® Performa) with the standard protocol. A total of 200 blood samples were collected from the umbilical cord of newborn piglets and were measured using the portable human glucose meter immediately after …

Effect Of Dexmedetomidine Combined With Pethidine On Minimum Alveolar Concentration Of Isoflurane In Dogs, Kanjana Vinyunantakul, Sumit Durongphongtorn, Marissak Kalpravidh

The Thai Journal of Veterinary Medicine

The effect of dexmedetomidine alone and when combined with pethidine on a minimum alveolar concentration (MAC) of isoflurane was determined in 24 client-owned adult male dogs before castration. Dogs were assigned to Group 1 (n = 12; dexmedetomidine, 5 µg/kg IM) or Group 2 (n = 12; dexmedetomidine, 5 µg/kgand pethidine, 5 mg/kg IM) . Sedation and response to noxious stimulation (digit clamping) were evaluated at 15 minutes after drug injection. Then, anaesthesia was induced via a face mask with isoflurane in oxygen and maintained via an endotracheal tube with an end tidal concentration of isoflurane (E´ISO%) of 1%, at …

Epidemiologic Evaluation Of Feline Urolithiasis In Thailand From 2010 To 2017, Vachira Hunprasit, Pinit Pusoonthornthum, Lori Koehler, Jody P. Lulich

The Thai Journal of Veterinary Medicine

This cross-sectional study describes the epidemiological data of feline urolithiasis in Thailand. Information on 923 feline uroliths submitted from Thailand to the Minnesota Urolith Center between January 2010 and December 2017 was evaluated. The frequency of urolith types, the relationships between urolith type and breeds and sex, were analyzed. Calcium oxalate was the most common urolith (49.5%) and was commonly found in male cats (OR = 1.81; 95%CI: 1.39, 2.36) with a mean age of 6.3±3.2 years. Struvite was the second most common urolith (38%), more frequently found in females (OR = 1.46; 95%CI: 1.11, 1.91) with a mean age …

Transcriptome Analysis Of Zi Geese (Anser Cygnoides) Prehierarchical Follicles And Verification Of Related Genes In Arginine Metabolic Pathway, Yongfeng Sun, Lulu Liu, Chang Liu, Cornelius Tlotliso Sello, Huiyan Wu, Hongtao Lu, Chenguang Xu, Yujian Sui

The Thai Journal of Veterinary Medicine

Arginine metabolism plays a pivotal role in the mammalian reproductive system by controlling various physiological processes of the reproductive organs including follicular development, ovulatory mechanisms and egg production. However little is known about the molecular mechanisms regulating arginine metabolism at early stages of folliculogenesis. The objective of the current study was to determine the arginine metabolic pathways in prehierarchical follicles of Zi geese through the Illumina Hiseq 2500 platform and their transcripts through the de novo assembly. In this study, five different stages of the geese prehierarchical follicles transcriptome were sequenced. A total of 31722729162 bp from 224929214 high quality …

Effect Of A Rapid Heat Treatment On Thai Qx-Like Infectious Bronchitis Virus And Evaluation Of Protection Induced By A Heat-Treated Virus, Tawatchai Pohuang, Sucheeva Junnu

The Thai Journal of Veterinary Medicine

The purpose of this study was to evaluate the effect of a rapid heat-treatment method on Thai QX-like infectious bronchitis virus (IBV) and the efficacy on protection from the virus after heat treatment. QX-like IBV isolate THA46 was incubated at 56 oC. The incubated virus was collected every 5 min for up to 1 h and then they were inoculated into embryonated chicken eggs. At 6 days post-inoculation, allantoic fluid was harvested from the embryonated eggs which were inoculated with virus of the longest heat-treatment time that induced lesions in the embryos. That allantoic fluid was used in a subsequent …

Dual Infection Of A Thai Isolate Hp-Prrsv And The Pdmh1n1 2009 Siv In Weanling Pigs, Nattaphong Sangpratum, Roongtham Kedkovid, Yonlayong Woonwong, Chaitawat Sirisereewan, Sawang Kesdangsakonwut, Roongroje Thanawongnuwech, Jirapat Arunorat

The Thai Journal of Veterinary Medicine

After the introduction of the pandemic H1N1 swine influenza virus (pdmH1N1 SIV) in Thai swine farms in 2009, a mild clinical outcome was observed and its role in porcine respiratory disease complex (PRDC) is questionable. A highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) has become endemic in Thai swine farms, recently. This study was conducted to determine the pathogenicity of the pdmH1N1 SIV when co-infected with a HP-PRRSV. Thirty-two weanling pigs from a free PRRSV, SIV, porcine circovirus type 2 (PCV-2) and Mycoplasma spp. commercial farm were randomly divided into 4 groups; Negative, PRRSV, the SIV and Co-infection …

Molecular Detection Of Trypanosoma Evansi In Camels (Camelus Dromedarius) In Southwestern Saudi Arabia, Alarabi Mohamed Elsiddig Mohamed, Yasser Osman Mohamed, Elshafie Ibrahim Elshafie, Yasser Jabir Ali Alharbi, Hesham Mohamed Al-Mekhlafi

The Thai Journal of Veterinary Medicine

This cross-sectional study aimed to determine the prevalence of Trypanosoma evansi infection and its associated risk factors in camels in the Jazan region, southwestern Saudi Arabia. A total of 679 blood samples were collected from three local breeds of camel – Awadia, Awarkia and Sawahelle – in 11 randomly selected governorates of Jazan region. Blood samples were screened by Giemsa-stained blood film (GSBF) and polymerase chain reaction (PCR) techniques. The overall prevalence of T. evansi was 30.9% (210/679, CI: 27.6–34.5%) by PCR, whereas a prevalence of 22.2% (151/679, CI: 19.3–25.5%) was revealed by GSBF. The highest prevalence was identified in …

Combination Of Rock Inhibitor, Hypoxia And Melatonin Improved Differentiation Of Rabbit Induced Pluripotent Stem Cells Into Cardiac Progenitor Cells, Praopilas Phakdeedindan, Piyathip Setthawong, Mongkol Techakumphu, Theerawat Tharasanit

The Thai Journal of Veterinary Medicine

Cardiac progenitors are a promising cell source for treating myocardial infarction. In this study, we improved the protocol for cardiac differentiation of rabbit induced pluripotent stem cells (iPSC) using Rho-associated protein kinase (ROCK) inhibitor (Y-27632), low O2 tension (hypoxia) and melatonin treatments. In experiment 1, the rabbit iPSCs were differentiated into cardiac cell fate via embryoid body (EB) formation with or without ROCK inhibitor. EB diameters were measured on day 3 of differentiation. In experiment 2, the EBs were plated on gelatin-coated dishes and further cultured in different oxygen tensions, hypoxia (5% oxygen) and normoxia (20% oxygen). The plated EBs …

Effect Of Nicotine On Gene Expression And Developmental Competence Of Bovine Oocytes, Seree Teerapong, Tassanee Faisaikarm, Natakarn Nimsanor, Chinarat Changsangfa, Kornkanok Promthep, Kulnasan Saikhun

The Thai Journal of Veterinary Medicine

Nicotine affected meiosis during oocyte maturation is associated with poor subsequent embryonic development. The aim of this study was to analyze the effects of nicotine exposure during in vitro maturation (IVM) on the outcomes of in vitro fertilization (IVF) and the expression of gene related development of oocytes and embryos. Immature (germinal vesicle, GV) oocytes were randomly cultured in IVM media containing nicotine at concentrations of 0.0 (control) 2.5, 5.0, and 10.0 mM. After culturing for 24 h, oocytes were assessed for their maturation rate, subjected to IVF and mRNA extraction for gene expression analysis using quantitative real time PCR …

Identification Of Streptococcus Spp. Isolated From Bovine Milk And Characterization Of Their Antimicrobial Susceptibility Profiles In Taiwan, Jui-Chun Hsieh, Yu-Shan Yen, Shih-Te Chuang

The Thai Journal of Veterinary Medicine

Bovine mastitis has had a great impact on the economic losses of the dairy industry. Nowadays, environmental pathogens cause the main types of bovine mastitis, especially the streptococci. The aim of the study was to identify the major Streptococcus species causing bovine mastitis in Taiwan as well as to reveal their antimicrobial susceptibility profiles. By colony morphology identifying, Gram staining, and subculturing on Edwards agar, the preliminary identified streptococci were subjected to biochemical identification, latex agglutination tests and dick diffusion tests for susceptibility tests of 16 antimicrobial agents. Among a total of 157 strains, Streptococcus uberis was the most dominant …

Recent Antimicrobial Susceptibility Of Lawsonia Intracellularis Field Isolates From Pigs With Proliferative Hemorrhagic Enteropathy In Korea, Byoung-Joo Seo, Sung-Hyun Moon, So-Min Lee, Seung-Yoon Lee, Byeong-Yeal Jung, Won-Il Kim, Chang-Seop Lee, Yeonsu Oh, Ho-Seong Cho

The Thai Journal of Veterinary Medicine

The study was performed to investigate the antimicrobial susceptibility of L. intracellularis field isolates from Korean pig farms. The novel four field isolates successfully obtained from clinical cases were prepared in IEC-18 cells to conduct the in vitro antimicrobial susceptibility testing (AST) by determining minimum inhibitory concentrations (MIC)s; either intracellular (InMIC) or extracellular MICs (ExMIC). The final MICs were assessed by counting the number of heavily infected cells (HICs;> 30 bacteria per cell) using an immunoperoxidase monolayer assay. Enrofloxacin (0.125 to 0.25 μg/mL: InMIC and 2 to 16 μg/mL; ExMIC) presented the most notable antimicrobial susceptibility, and marbofloxacin (0.25 to …