Elucidating The Regulon Of A Fur-Like Protein In Mycobacterium Avium Subsp. Paratuberculosis (Map),
2020
Michigan State University
Elucidating The Regulon Of A Fur-Like Protein In Mycobacterium Avium Subsp. Paratuberculosis (Map), Fernanda Miyagaki Shoyama, Taveesak Janetanakit, John P. Bannantine, Raul G. Barletta, Srinand Sreevatsan
Nebraska Center for Virology: Faculty Publications
Intracellular iron concentration is tightly regulated to maintain cell viability. Iron plays important roles in electron transport, nucleic acid synthesis, and oxidative stress. A Mycobacterium avium subsp. paratuberculosis (MAP)-specific genomic island carries a putative metal transport operon that includes MAP3773c, which encodes a Fur-like protein. Although well characterized as a global regulator of iron homeostasis in multiple bacteria, the function of Fur (ferric uptake regulator) in MAP is unknown as this organism also carries IdeR (iron dependent regulator), a native iron regulatory protein specific to mycobacteria. Computational analysis using PRODORIC identified 23 different pathways involved in respiration, metabolism, and virulence …
Dgts Production As A Phosphate Starvation Response In The Human Fungal Pathogen Candida Albicans,
2020
University of Nebraska-Lincoln
Dgts Production As A Phosphate Starvation Response In The Human Fungal Pathogen Candida Albicans, Caleb J. Wehling
School of Biological Sciences: Dissertations, Theses, and Student Research
Betaine lipids are a class of membrane lipids with betaine head groups. Three betaine lipids are known: diacylglyceryltrimethylhomoserine (DGTS), diacylglycerylhydroxymethylalanine (DGTA), and diacylglycerylcarboxymethylcholine (DGCC). Betaine lipids are most common in algae, although DGTS, the most common betaine lipid, is also found in many bacteria and fungi. Organisms which produce betaine lipids (especially DGTS) often don’t produce phosphatidylcholine (PtdCho), and DGTS structure resembles PtdCho structure without any phosphorous, leading to the hypothesis that betaine lipids may substitute for phospholipids in some organisms. This has been confirmed by discoveries that some organisms are capable of switching their membrane composition from PtdCho to …
Two (Or More) Viruses In One Bat: A Systematic Quantitative Literature Review Of Viral Coinfection In Bats,
2020
SIT Study Abroad
Two (Or More) Viruses In One Bat: A Systematic Quantitative Literature Review Of Viral Coinfection In Bats, Eli J. Kaufman
Independent Study Project (ISP) Collection
Viral coinfection is an important topic in pathogen dynamics, and can increase viral shedding and change disease outcomes. As bats are carriers of important zoonoses, such as the SARS coronaviruses, rabies, and other deadly viruses, knowing more about their coinfection dynamics is important. This quantitative systematic literature review sought to show how many papers reported bat viral coinfections, and created three databases. The first database, the SQLR database was based on searches for coinfections. The second database, the Astrovirus database was to determine how much of the literature was being missed by examining a single viral family more in depth …
Effect Of Homofermentative Inoculant On Fermentation Characteristics And Nutritive Values Of Corn Silage,
2020
Agripak Labs, Rawalpindi, Pakistan
Effect Of Homofermentative Inoculant On Fermentation Characteristics And Nutritive Values Of Corn Silage, Nafeesa Qudsia Hanif, Iffat Tahira, Nighat Sultana, Mujahid Hasan
Journal of Bioresource Management
An in vitro study was planned to assess the effects of a homofermentative microbial inoculant on the fermentation parameters and nutritive value of corn silage. The inoculant was applied at concentrations of 5x104cfu/g of forage (T1), 1x105cfu/g of forage (T2) 1.5x105cfu/g of forage (T3) and a negative control group (T0) without bacterial inoculant in three replicates each. At day 3, 7, 45 and 90 of the experiment individual buckets were opened to characterize the material, quick acidification, dry matter recovery, and aerobic stability of silage respectively. The temperature of the trial samples was 32.75±1.92 …
Epidemiological Significance Of Parasitic Infections In Olive Baboons (Papio Anubis) At Gombe National Park, Tanzania,
2020
Department of Biological Sciences, Dar es Salaam University College of Education, P. O. Box 2329, Dar es Salaam, Tanzania.
Epidemiological Significance Of Parasitic Infections In Olive Baboons (Papio Anubis) At Gombe National Park, Tanzania, Jared S. Bakuza
Tanzania Journal of Science
Several parasites of significant health importance have been observed in baboons at Gombe National Park in western Tanzania. However, little is known on impacts these infections have on baboon health. Baboon stools were examined for parasites using formol-ethyl technique and their health and troop membership associated with parasitic infections. Observed nematode parasites were; Streptopharagus sp., Physaloptera sp., unidentified nematodes, hookworms and Trichuris sp. Trematode parasites included Schistosoma mansoni and unidentified trematode, with the latter’s intensity being highest in DB troop baboons. Parasite egg counts (epg) for nematodes ranged from 9 to 12, and that of trematodes from 4 to 40 …
On The Inadequacy Of Species Distribution Models For Modelling The Spread Of Sars-Cov-2: Response To Araújo And Naimi,
2020
Norwegian Institute for Nature Research
On The Inadequacy Of Species Distribution Models For Modelling The Spread Of Sars-Cov-2: Response To Araújo And Naimi, Joseph D. Chipperfield, Blas M. Benito, Robert B. O'Hara, Richard J. Telford, Colin J. Carlson
United States Public Health Resources
The ongoing pandemic of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is causing significant damage to public health and economic livelihoods, and is putting significant strains on healthcare services globally. This unfolding emergency has prompted the preparation and dissemination of the article “Spread of SARS-CoV-2 Coronavirus likely to be constrained by climate” by Araújo and Naimi (2020). The authors present the results of an ensemble forecast made from a suite of species distribution models (SDMs), where they attempt to predict the suitability of the climate for the spread of SARS-CoV-2 over the coming months. They argue that climate is …
Comparison Of Five Methods For Detection Of Extended Spectrum Β-Lactamases In Gram Negative Enteric Bacteria,
2020
Biophysics Dept., College of Science, University of Mosul
Comparison Of Five Methods For Detection Of Extended Spectrum Β-Lactamases In Gram Negative Enteric Bacteria, Mahmood Z. Al-Hasso, Subhi H. Khalaf
Karbala International Journal of Modern Science
The presence of extended-spectrum β-lactamases in 55 isolates of Gram negative enteric bacteria isolated from lower respiratory tract infections, was investigated by using the Clinical Laboratory Standards Institute CLSI method which showed that 41.8% of the isolates produced this type of β-lactamases, and that Klebsiella pneumoniae isolates were the most producing species with a production rate of 61.1%, followed by Escherichia coli isolates 43.75%. Five confirmatory methods were used to detect these enzymes: ceftazidime agar method, double-disk synergy method, combination disk method, modified 3D extract method and enzymatic disks method. The study indicated that ceftazidime agar method was the best …
To Mid-Cell And Beyond: Characterizing The Roles Of Gpsb And Ypsa In Cell Division Regulation In Gram-Positive Bacteria,
2020
University of South Florida
To Mid-Cell And Beyond: Characterizing The Roles Of Gpsb And Ypsa In Cell Division Regulation In Gram-Positive Bacteria, Robert S. Brzozowski
USF Tampa Graduate Theses and Dissertations
The bacterial cell division protein FtsZ is a tubulin homolog that forms a ring-like structure at the site of cell division in most bacterial species. There it acts as a scaffold, aiding in the recruitment of other divisome proteins to the site of cell division. Furthermore, studies focusing on the role of FtsZ treadmilling and septal peptidoglycan synthesis implicates that FtsZ plays a direct role in the ultimate closure of the division septum. Thus, many studies in the field of bacterial cell division have focused on FtsZ in terms of its spatial and temporal regulation as well as its ability …
Sunflower Seedlings Fail To Remove Uranium Pollution In The Navajo Nation: Participatory Science As A Path To Build Community And Address Environmental Injustice,
2020
Brigham Young University
Sunflower Seedlings Fail To Remove Uranium Pollution In The Navajo Nation: Participatory Science As A Path To Build Community And Address Environmental Injustice, Zak R. Webber
Undergraduate Honors Theses
Mid-20th century mining on Naabeehó Bináhásdzo (Navajo Nation) polluted groundwater with high concentrations of uranium and arsenic. The Navajo Nation and other rural residents of this region use groundwater for drinking, livestock, and irrigation. However, many individuals and communities must purchase and transport treated water from locations that are often hours away. Sunflowers have been shown to preferentially take up heavy metals, including uranium and arsenic, potentially representing a tool to improve water quality through on-site, low-cost phytoremediation. We carried out a collaborative research project with a high school class on the Navajo Nation in 2018 and 2019. The students …
Evaluation And Improvement Of A Novel Method For Rapid Promoter Characterization In A Zebrafish Model,
2020
Brigham Young University
Evaluation And Improvement Of A Novel Method For Rapid Promoter Characterization In A Zebrafish Model, Hunter Giles
Undergraduate Honors Theses
This thesis examines a novel technique for characterizing promoters using a zebrafish model. The proximal upstream cis-regulatory elements, also known as promoters or promoter regions, are essential for the precise regulation and timing of gene expression. Often the characterization of these regions relies on imprecise methods involving large deletions or bioinformatic predictions rather than experimental data. However, high-throughput sequencing technology could potentially allow large libraries containing hundreds of thousands of variants of a single promoter to be simultaneously analyzed. We have been working to develop a novel method for promoter characterization that takes advantage of this technology. We tested this …
Targeting The Eskape Pathogens By Botanical And Microbial Approaches,
2020
University of South Florida
Targeting The Eskape Pathogens By Botanical And Microbial Approaches, Emily Dilandro
USF Tampa Graduate Theses and Dissertations
There is a vital need to find new clinical treatment options to combat ESKAPE pathogen infections. Nature has thus far been the most fruitful at providing antimicrobial compounds, which have been derived from a plethora of sources. Ranging from plants to microbial communities, these organisms create chemical compounds that are used as defense mechanisms against invasive or encroaching organisms and confer the producers with competitive advantages. In this study, cinnamaldehyde was investigated as a botanical approach to finding active antimicrobial compounds that inhibit the ESKAPE pathogens. Here, we show that all the ESKAPE pathogens are inhibited by cinnamaldehyde concentrations between …
Context-Dependent Dynamics Lead To The Assembly Of Functionally Distinct Microbial Communities,
2020
Boise State University
Context-Dependent Dynamics Lead To The Assembly Of Functionally Distinct Microbial Communities, Leonora S. Bittleston, Matti Gralka, Gabriel E. Levanthal, Itzhak Mizrahi, Otto X. Cordero
Biology Faculty Publications and Presentations
Niche construction through interspecific interactions can condition future community states on past ones. However, the extent to which such history dependency can steer communities towards functionally different states remains a subject of active debate. Using bacterial communities collected from wild pitchers of the carnivorous pitcher plant, Sarracenia purpurea, we test the effects of history on composition and function across communities assembled in synthetic pitcher plant microcosms. We find that the diversity of assembled communities is determined by the diversity of the system at early, pre-assembly stages. Species composition is also contingent on early community states, not only because of …
Genetic Diversity Of Potassium Ion Channel Proteins Encoded By Chloroviruses That Infect Chlorella Heliozoae,
2020
University of Nebraska - Lincoln
Genetic Diversity Of Potassium Ion Channel Proteins Encoded By Chloroviruses That Infect Chlorella Heliozoae, Carter Murry
Honors Program: Senior Projects (Public)
Chloroviruses are large, plaque-forming, double-stranded DNA viruses that infect chlorella-like green algae that live in a symbiotic relationship with protists. Chloroviruses have a genome from 290 to 370 kb, and they encode as many as 400 proteins. One interesting feature of chloroviruses is that they encode a potassium ion (K+) channel protein named Kcv. K+ channels are essential proteins for life. They cross the membrane of the cell to quickly and selectively allow K+ in or out of the cell. This helps regulate the electrical charge of a cell which in turn helps control electrical signaling …
The Ecology And Conservation Of An Urban Karst Subterranean Estuary,
2020
University of South Florida
The Ecology And Conservation Of An Urban Karst Subterranean Estuary, Robert J. Scharping
USF Tampa Graduate Theses and Dissertations
Sulphur Springs is an artesian spring and part of the limestone karst topography of metropolitan Tampa, Florida, USA. Underlying this spring is an extensive cave system that hosts saltwater vents and conspicuous microbial biofilm communities. For decades, water from Sulphur Springs has been extracted and used to supplement public water supply and dry season flows in the Hillsborough River Estuary. This dissertation describes research conducted at Sulphur Springs to determine the impacts of urban land use on the underlying cave and downstream estuary ecosystems, and presents the use of this system as a model to fill certain ecological knowledge gaps. …
Investigating The Role Of Torc1 And The Transcription Factor Sfp1p In The Regulation Of Hmo1 Gene In Saccharomyces Cerevisiae,
2020
Louisiana State University and Agricultural and Mechanical College
Investigating The Role Of Torc1 And The Transcription Factor Sfp1p In The Regulation Of Hmo1 Gene In Saccharomyces Cerevisiae, Mathew Damien Smith
LSU Master's Theses
HMGB proteins are eukaryotic, chromatin-associated proteins that play roles in both DNA dynamics and transcription regulation. Hmo1p is an HMGB protein in Saccharomyces cerevisiae that behaves somewhat like a hybrid between mammalian HMGB proteins and the metazoan linker histone H1. mTORC1, a protein complex containing the Tor1p kinase and a major regulator of cellular growth, is inhibited by both rapamycin and stress. It has also been shown to not only associate with Hmo1p at various gene promoters, but also regulate the HMO1 gene itself through direct binding. In this study, the Hmo1p-mTORC1 relationship was further investigated through two questions: 1) …
Fate And Biofilm Formation Of Wild-Type And Pressure-Stressed Pathogens Of Public Health Concern In Surface Water And On Abiotic Surfaces,
2020
Tennessee State University
Fate And Biofilm Formation Of Wild-Type And Pressure-Stressed Pathogens Of Public Health Concern In Surface Water And On Abiotic Surfaces, Md Niamul Kabir, Sadiye Aras, Sabrina Wadood, Shahid Chowdhury, Aliyar Cyrus Fouladkhah
Agricultural and Environmental Sciences Faculty Research
Since the historic outbreak near Broad Street in London, which serves as cornerstone of modern epidemiology, infectious diseases spread in surface and sub-surface water has been a persisting public health challenge. The current study investigated persistence of wild-type and pressure-stressed Listeria monocytogenes, Escherichia coli O157:H7, and non-typhoidal Salmonella enterica serovars in surface water stored aerobically for up to 28 days at 5, 25, and 37 °C. Additionally, biofilm formation of wild-type and pressure-stressed non-typhoidal Salmonella serovars were monitored on surface of stainless steel and rubber coupons for 28 days at 25 and 37 °C. While L. monocytogenes exhibited a lower …
Listeria Monocytogenes Response To Anaerobic Environments,
2020
Mississippi State University
Listeria Monocytogenes Response To Anaerobic Environments, Brandy N. Roberts, Damayanti Chakravarty, J.C. Gardner Iii, Steven C. Ricke, Janet R. Donaldson
Faculty Publications
Listeria monocytogenes is a Gram-positive facultative anaerobic bacterium that is responsible for the disease, listeriosis. It is particularly lethal in pregnant women, the fetus, the elderly and the immunocompromised. The pathogen survives and replicates over a wide range of temperatures (4 to 42 °C), pH, salt and oxygen concentrations. Because it can withstand various environments, L. monocytogenes is a major concern in food processing industries, especially in dairy products and ready-to-eat fruits, vegetables and deli meats. The environment in which the pathogen is exposed can influence the expression of virulence genes. For instance, studies have shown that variations in oxygen …
Diatom Voucher Flora And Comparison Of Collection Methods For Biodiversity Hotspot Upper Three Runs Creek,
2020
Georgia College & State University
Diatom Voucher Flora And Comparison Of Collection Methods For Biodiversity Hotspot Upper Three Runs Creek, Katie M. Johnson
Biology Theses
Surface freshwater is a scarce resource. Due to the scarcity and necessity of this resource, it is imperative that its quality is routinely monitored. One way of monitoring water quality is through biological assessments, which include examining algal assemblages. Regionally, little remains known of algal taxa in the southeastern United States. In the past, the Academy of Natural Sciences of Philadelphia (ANSP) conducted biological assessments along the Savannah River finding Gomphonema parvulum (Kützing) Kützing 1849 to be a dominant taxon rendering assessments inconclusive. Recent studies have provided evidence that species complexes and semi-cryptic taxa have been identified within the Gomphonema …
Quantifying Nutrient Throughput And Dom Production By Algae In Continuous Culture,
2020
Case Western Reserve University
Quantifying Nutrient Throughput And Dom Production By Algae In Continuous Culture, Anne Willem Omta
Faculty Scholarship
Freshwater and marine algae can balance nutrient demand and availability by regulating uptake, accumulation and exudation. To obtain insight into these processes under nitrogen (N) and phosphorus (P) limitation, we reanalyze published data from continuous cultures of the chlorophyte Selenastrum minutum . Based on mass budgets, we argue that much of the non-limiting N and P had passed through the organisms and was present as dissolved organic phosphorus or nitrogen (DOP or DON). We construct a model that describes the production of biomass and dissolved organic matter (DOM) as a function of the growth rate. A fit of this model …
Development Of Pcr-Based Detection System For Soft Rot Pectobacteriaceae Pathogens Using Molecular Signatures,
2020
Tennessee State University
Development Of Pcr-Based Detection System For Soft Rot Pectobacteriaceae Pathogens Using Molecular Signatures, Md Niamul Kabir, Ali Taheri, C. Korsi Dumenyo
Agricultural and Environmental Sciences Faculty Research
Pectobacterium and Dickeya species, usually referred to as soft rot Enterobacteriaceae, are phytopathogenic genera of bacteria that cause soft rot and blackleg diseases and are responsible for significant yield losses in many crops across the globe. Diagnosis of soft rot disease is difficult through visual disease symptoms. Pathogen detection and identification methods based on cultural and morphological identification are time-consuming and not always reliable. A polymerase chain reaction (PCR)-based detection method with the species-specific primers is fast and reliable for detecting soft rot pathogens. We have developed a specific and sensitive detection system for some species of soft rot Pectobacteriaceae …
