Source: VIRGINIA STATE UNIVERSITY submitted to NRP
AMR IN SMALL RUMINANT AGRO-SYSTEMS
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
ACTIVE
Funding Source
Reporting Frequency
Annual
Accession No.
1028279
Grant No.
2022-68015-36719
Cumulative Award Amt.
$525,472.00
Proposal No.
2021-08939
Multistate No.
(N/A)
Project Start Date
Jan 15, 2022
Project End Date
Jan 14, 2026
Grant Year
2022
Program Code
[A1366]- Mitigating Antimicrobial Resistance Across the Food Chain
Recipient Organization
VIRGINIA STATE UNIVERSITY
(N/A)
PETERSBURG,VA 23803
Performing Department
Agricultural Research Station
Non Technical Summary
Due to the significance in animal and public health, addressing antimicrobial resistance is the responsibility of all, including medical and veterinary professionals and the general public. An important prerequisite to mitigation of AMR is understanding the burden in each of the potential reservoirs of AMR in the environment. Despite the fact that antibiotics are used insmall ruminant agrosystems, albeit in an extra-label manner, no studies have evaluated the potential existence of AMR in these systems. Besides, small ruminants are hosts to bacteria including E.coli, Salmonella, and Campylobacter of public health importance that may be resistant to antibiotics making it difficult to treat these conditions. Thus an understanding of the extent of antimicrobial resistance in these systems and factors that lead to the use of antibiotics will be useful in designing educational tools to create awareness and provide resources to address AMR in these systems.In this project, small ruminant farms will be visited and fecal samples will be collected from small ruminants. Additionally, abattoirs, state fairs, and livestock auction sites will be visited and fecal samples collected from small ruminants on site. In the laboratory, samples will be screened for the presence of bacteria that are resistant to important antibiotics. Producers will also fill out a survey on antibiotic use on their farms. Data collected from the laboratory will inform on how common antibiotic-resistant bacteria are in small ruminants, which type of antibiotics most are resistant to, and if the type of resistance can be spread to other bacteria in the animal, environment, and humans. In addition, we shall have an understanding of what factors or challenges small ruminant producers face, that lead to the use of antibiotics on the farm.This information combined will inform and be used to reach out to small ruminant clientele through educational workshops, to create awareness on the significance of AMR to buildconnectionsand generate resources to help them address animal health challenges, and to reduce or prevent AMR in these systems.
Animal Health Component
20%
Research Effort Categories
Basic
80%
Applied
20%
Developmental
(N/A)
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
7233999117030%
3073610110060%
7223820104010%
Goals / Objectives
The overall goal of the project is to evaluate and document the burden of antimicrobial resistance ( AMR) in small ruminant agrosystems in Virginia for use in designing informed mitigation strategies, but also with broad application in other small ruminant agrosystems in the US. This includes evaluating AMR prevalence and diversity in both commensal and pathogenic bacteria of economic and public health importance. Three broad objectives are proposed in this project that include: 1. Quantify the prevalence and diversity of AMR in commensal E. coli and foodborne pathogens (pathogenic E.coli, Campylobacter and Salmonella) in sheep and goats in Virginia;2.Determine knowledge, attitudes, and behavior around antimicrobial drug use by small ruminant farmers and veterinarians in Virginia; and3. Develop and disseminate face to face, printed, and online resources to address small ruminant health, husbandry, foodborne pathogens, and anti-microbial resistance (AMR).
Project Methods
The project involves field fecal sample collection from small ruminants from several critical control points (producer farms, abattoirs, state fairs, and livestock auction sites). The second step involves laboratory isolation of commensal (E.coli) and pathogenic bacteria (E.coli, Campylobacter, and Salmonella) of economic and food safety importance using established methods currently in use in the host labs. Isolates will be screened for antimicrobial resistance using the Kirby-Bauer disk diffusion method on Mueller-Hinton agar following recommendations by the Clinical and Laboratory Standards Institute (CLSI). In resistant isolates, genes responsible for resistance will be screened using molecular methods. Data will be analyzed using descriptive statistics including calculation of prevalence rates of AMR , and resistance to specific antibiotics in commensal E.coli and foodborne pathogens, calculation of prevalence rate of pathogenic E.coli, Campylobacter, and Salmonella, and calculation of the prevalence of each AMR gene in the resistant isolates. Comparisons will be analyzed using Chi test of prevalence on farms vs abattoirs vs livestock fairs vs state fairs. Comparisons will also be made on the prevalence of each antibiotic, and the prevalence of AMR in samples collected from different counties and farms.A survey will also be conducted targeting small ruminant producers and veterinarians in the state to understand antimicrobial drug use practices for small ruminants and to evaluate the knowledge and perception of small ruminant farmers and veterinarians in VA. Two questionnaires, one targeting producers and another targeting veterinarians will be designed, tested, and disseminated to the target groups.Data will be analyzed appropriately using descriptive statistics and methods of principal components analysis for (a) knowledge and perceptions of antimicrobial drug stewardship among farmers and veterinarians, (b) antimicrobials drug use practices in small ruminant farms in Virginia and (c) exposure of small ruminants to antimicrobial drugs.Extension outreach efforts (workshops and field days) will include: a) organizing educational workshops that will bring together small ruminant producers, county agents, and food animal veterinarians in different counties within VA) ; b) Developing and dissemining printed and digital resources including fact sheets on common small ruminant health problems and management strategies); and c) Establishing database of veterinarians and agents who work with small ruminants in the state, their location, contact information and their practice reach. Students will be mentored through participation in field sample and survey data collection, attending classes, laboratory research data collection, and data analysis.The research aspect of the project will be evaluated based on the completion of activities planned that include:success in identifying farms to be sampled, success in sample collection from farms, abattoirs, and livestock and state fairs, success in laboratory processing, success in designing and testing survey tool, success in dissemination and success in survey tool response. Success in recruiting and training students in research and laboratory skills will be evaluated.The extension and outreach aspect of the project will be evaluated based on: number of workshops held, number of small ruminant producers trained, number of extension agents trained, number of educational printed and online materials developed, success in developing online veterinary and other stakeholder resource databases.

Progress 01/15/24 to 01/14/25

Outputs
Target Audience:In 2024 the project successfully carried out several efforts involving the target audience outlined in the intitial project proposal. To complete field sample collection, several small ruminant producer farms were visited for sample collection from animals. Producers were also engaged through virtual Animal Diseases and AMR (antimicrobial resistance) Webinar and inperson outreach activities like VSU Agriculture field days and Small Ruminant Field day. Several undergraduate and graduate students students were engaged in laboratory research activities and experiential learning opportunities detecting AMR in commensal and pathogenic bacterial isolates from small ruminants. The students presented their research findings to producers, scientists and other students during field days, local and national scientific conferences respectively. Other scientists, public health practice professionals, One health professionals were engaged during scientific conferences presentations. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?The project activities carried out during the year provided several training and mentorship opportunities to undergraduate and graduate students from Virginia state University and Virginia tech. These opportunities involved the project team working alongside students at their respective Universities but also student visit between the two universities. Students were trained broadly in microbiology skills, animal diseases, One health, zoonotic pathogens. In the laboratory, students were trained on microbial isolation of bacteria from fecal samples including identification, use of selective media, preparation of media, testing for antimicrobial resistance, DNA extraction, typing the pathogenic potential of bacterial isolates.They were also mentored on research methods including designing research questions and obectives, data entry in excel, data presentation, data analysis and presentation in scientific conferences and how to present scientific information to general public during Agriculture field days. The project team also trained laboratory techinicians who worked in the project on the specific skills applied in the project protocols including unique bacteria specific isolation protocols, confirmation and advanced molecular techniques applied for each bacterial species.The project provided opportunities for the project team to attend and present project findings in scientific conferences and attend NIFA project Directors meetings. During the conferences, the team members were able to learn from other scientists the current status and progress in addressing AMR. How have the results been disseminated to communities of interest?Preliminary project findings have been presented to the scientific community, small ruminant producers and to the broader community in different forums. Students who participated in the prodect were able to present the findings during Agriculture Research Directors 2024 meeting.The meeting attracts students and faculty from all historically black colleges in the US. Some of the findings were also presented to scientists and One health experts during the National Institute of Antimicrobial Resistance Research and Education (NIAMRRE) annual conference and Conference of Research Workers on Animal Diseases (CRWAD). These meetings are attended by animal diseases scientists, AMR scientists, public health practitioners, veterinarians, medical doctors, pharmacists, undergraduate and graduate students and innovators working in the field of antibiotics and antimicrobial resistance among others. VSU held two Agriculture field day days and the project team members interacted with the broader Virginia community to highlight and educate the relevance of AMR to human, animal and environmental health (One health). We also demonstrated some of the isolates from the project portraying multidrug resistance (MDR) to further explain to the public what this implies to combating human and animal diseases.The field days are attended by the community members, local leaders, K1-12 students from neighboring schools and students and faculty from VSU.VSU cooperative extension held a a workshop for small ruminant producers and part of the program involved updates on antimicrobial resitance and findings by the project team. What do you plan to do during the next reporting period to accomplish the goals?Activities projected for the next period include further characterization of antibiotic resistant isolates to determine the genetic mechanism of the resistance and completing the serogrouping of the resistant isolates. The identity of other enteric non E.coli antibiotic resitant isolates detected in this study will also be confirmed during this period. Isolated Campylobacter species will be evaluated for antibiotic resitant status and typing of the strains detected. Data will be analyzed and organized for publication and final deposition in the Ag data commons. The developed questionnaire will be deployed to producers and veterinarians in the state, data collected and analyzed. The findings from laboratory analysis and questionnaire data will be organized and presented to relevant stakeholders in scientific conferences, Ag field days, workshops and also published in relevant journals. The project will continure to involve and train students on laboratory microbiology skills and research data entry and analysis.

Impacts
What was accomplished under these goals? During the reporting period, enteric bacteria isolated from sheep and goats fecal samples from Virginia farms were evaluated for presence antimicrobial resistance elements (ARE) and also probed on whether these were disease causing or normal inhabitants of the gut. Although the number of samples carrying antibiotic resistant bacteria and the type of antibiotic resistance detected varied from farm to farm, at least one sample from each farm was found to carry an antibiotic resistant element. E.coli isolates with ARE were typed for their ability to cause diseases in human or animasl by evaluating whether they have the virulence genes (Shiga toxins genes, intimin, hemolysin) and serogrouping. Potentially pathogenic E.coli and other enteric bacteria with or without ARE were detected either in the same sample or other samples from the same farm in some of the farms. Samples were also evaluated for the presence of other foodborne pathogens including Salmonella and Campylobacter. In over 50% of the farms, Campylobacter species were detected in the samples but Samonella was rare. DNA was also extracted for the Campylobacter to determine which strain they are. This will answer the question of whtether they can cause disease in human or animals. A questionnare to determine knowledge, attitudes and behavior around antibiotic use was also developed and tested with a group of small ruminant farmers and veterinarians. To address issues on small ruminant health, and educate producers on antibiotic resistance and its One health (human,animal environmental health) implications, a virtual webinar and a face to face educational workshop was organized by Virginia State Cooperative Extension Faculty and other project team members targeting producers with Q&A addressed by food animal veterinarians (In-state and out of state) and other small ruminant experts. During the Webinar and workshop, producers had the opportunity to ask question on pressing issues on animal health, antibiotics use and other animal husbandry questions to practicing Veterinarians, other small ruminant and food safety experts invited to speak. Some of the preliminary findings on project findings on ARE detected in a cohort of the farms were also presented during the face to face workshop. As part of the the overall goal of the project, key findings so far were also presented to animal health scientists, AMR experts and One health practice professionals during scientific meetings and proceedings. Undergraduate and graduate students (Virginia State) and graduate student (Virginia Tech) were also engaged fully in experiential learning opportunities of microbial isolation, antimicrobial screening, foodborne pathogens, animal and One health knowledge, development of survey tools and scientific conference presentations.

Publications


    Progress 01/15/23 to 01/14/24

    Outputs
    Target Audience:Target audiences reached:1. Small ruminant producers in the state of Virginia (collection of fecal samples from small ruminants), informal discussion on One health as it relates to animals and human health 2. Graduate and undergraduate students at Virginia state university 3. Scientific community Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?Two undergraduate students and two graduate students have partcipated in the project actvities including field sample collection and laboratory analysis. The PI and the students have participated in conferences. How have the results been disseminated to communities of interest?The results have been presented in three conferences including local graduate conference to University community, international conference(CRWAD), and national conference(Agricultural Research Directors (ARD) meeting conference. What do you plan to do during the next reporting period to accomplish the goals?1. Data analysis to fully characterize diversity of AMR in E.coli and other enteric bcateria from the different farms.Characterize AMR genetic mechanisms. 2.Characterization of E.coli to determine virulence/pathogenic status 3.Evaluation of AMR status of Campylobacter and characterizing the Campylobacter species 4.Dissemination of survey questionnaire to producers and veterinarians 5.Organize a producer workshop 6.Develop manuscripts

    Impacts
    What was accomplished under these goals? During this period, objective 1. a)Quantifing the prevalence and diversity of AMR in commensal E. coli and determining prevalence foodborne pathogens (Campylobacter and Salmonella) in sheep and goats in Virginia was carried out.Samples from 27 farm locations incuding 340 small ruminants across Virginia were evaluated for the presence of E.coli with antibiotic resistance characteristics and presence of Campybacter and Salmonella spp. E.coli with at least one antibiotic resistance profile was detected in all farms although the prevalence and diversity of antibiotic resitant profiles differed across the farms.This information has increased awareness on the existence of antibiotic resistance elements in small ruminants even in systems with no record of use of antibiotics. Further analysis of the diversity of AMR alongside production systems will inform on potential sources and transmission pathways of AMR on these farms. This knowledge gap is important for devising mitigation pathways. Campylobacter spp were common in most farms while Salmonella spp were rare. 2.The survey questionnaire has been drafted.

    Publications

    • Type: Conference Papers and Presentations Status: Published Year Published: 2024 Citation: Detection of multiple enteric bacterial pathogens in sheep and goats in a live animal exhibition in Virginia (CRWAD 2024)


    Progress 01/15/22 to 01/14/23

    Outputs
    Target Audience:The target audience reached during this period are small ruminant producers in different counties in Virginia and minority undergraduate students at Virginia State University, and a graduate student at Virginia Tech Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?The project has offered experiential training and research mentoring opportunities to undergraduate students at VSU through engagement in laboratory research activities How have the results been disseminated to communities of interest? Nothing Reported What do you plan to do during the next reporting period to accomplish the goals?In the next reporting period, 1. Continue collecting field samples from farms, slaughterhouses, and auction sites. 2. Continue microbial isolation and AMR screening in the laboratory 3. Review, test, finalize and disseminate the survey questionnaire 4. Engage students in research and laboratory activities 5. Present on AMR and foodborne pathogensawareness during a workshop/field day in collaboration with a Small ruminant extension specialist

    Impacts
    What was accomplished under these goals? Accomplishments: To quantify the prevalence of AMR in E.coli and other foodborne pathogens, several farms in different counties in Virginia were visited, and fecal samples were collected from small ruminants. Fecal samples have been saved in glycerol, and isolation of E.coli, Campylobacter, and Salmonella is ongoing. The co-PI at Virginia Tech has indicated he and a graduate student have drafted a questionnaire that is in the final process and will be shared with the project team soon.

    Publications