Source: VIRGINIA STATE UNIVERSITY submitted to NRP
PROBIOTIC IMPROVED GUT HEALTH PERFORMANCE OF MEAT GOATS
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
COMPLETE
Funding Source
Reporting Frequency
Annual
Accession No.
1018237
Grant No.
2019-38821-29149
Cumulative Award Amt.
$299,585.00
Proposal No.
2018-04972
Multistate No.
(N/A)
Project Start Date
Mar 1, 2019
Project End Date
Feb 28, 2023
Grant Year
2019
Program Code
[EQ]- Research Project
Recipient Organization
VIRGINIA STATE UNIVERSITY
(N/A)
PETERSBURG,VA 23803
Performing Department
Agricultural Research Station
Non Technical Summary
Impaired gut health due to internal parasitism and bacterial infections are the major health challenges that reduce profitability of small ruminant production in United States and worldwide. The situation is confounded by rapid development of resistance to anti-parasitic drugs coupled with current scourge of antimicrobial resistance to many antibiotics. Currently resistance to all the major classes of anthelminticdrugs has been reported and there is also a global World Health Organization (WHO) call for reduction of antibiotics use in farm animals. There is therefore an urgent call for research to evaluate and validate effective alternative antimicrobial and anti-parasitic products. Additionally, there is an increasing demand by consumers for organic and naturally raised products. As potential options, the generally regarded as safe (GRAS) microorganisms or probiotics have shown great promise with antibacterial and anti-parasitic effects, improving performance and final product quality in a numberof farm animals. However,a significant gap knowledge exists on whether similar benefits are achievablein small ruminants. Therefore the goal of this project is to evaluate the effect of early administration of probiotics on overall health and performance of meat goats under pasture. Newborn animals will be supplemented orally with different strains ofprobiotics and the effect onoverall health and performance evaluated over the growing period. Additionally the effect of probiotic supplementation on product quality and safety at slaughter will be evaluated.By establishing a healthy gut microbiome at birth, probiotic strains may have potential to inhibit harmful gut bacteria and parasites and improve the overall health and perfomance of meat goats. The project will evaluate and develop sustainable disease and parasite strategies that improve health,increase meat goat production profitability, ensure the safety and quality of the goat meat that can readily be applied by producers.
Animal Health Component
30%
Research Effort Categories
Basic
50%
Applied
30%
Developmental
20%
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
3154099101025%
3073820104010%
3113999109020%
3084010110025%
7224050111020%
Goals / Objectives
The overarching goal of the project is to evaluate,validate and develop sustainable effective products that can be used to improve the health and perfomance of meat goats (profitability), improve meat quality and safetyconsequently offering alternatives to currently used antibiotics and antiparasitics. The mainr goalof the current project is to evaluateand elucidate the healthy benefits of probioticsadministration during the early neonatal period in improving the health of the growing meat goats, reducing prevalence ofmicrobial pathogens and parasites and improving the quality of the final meat product. Anotherproject goal is todocument the effect of probiotics on the overall gut microbial diversity in meat goats while alsooffering hands on opportunities and research skills experience for STEM students at Virginia State University. Five objectives will be implemented by the the project:i) Determine the effect of early probiotic supplementation in goat kids on overall health and immunityii) Evaluate the anti-parasitic efficacy of probiotic supplementation in goat kidsiii) Determine the effect of early probiotic supplementation on growth performance, final carcass quality and reduction of food safety pathogens in goat meativ) Evaluate effect of probiotic supplementation on gut microbial diversity using 16S sequencingv) Offer experiential learning to STEM/STEAM students
Project Methods
Neonatalgoat kids will be orally administered with either a commercially available probiotic, custom mixed probiotic strains purchased from ATCC previously found to be beneficial in a few animal studies or a placebo (phosphate buffered saline). Overall health will be monitored by observation of experimental animals daily for general wellbeing and signs of ill health. Occurrence of specific disease conditions (diarrhea, respiratory etc), treatment and mortality data will be recorded throughout the project duration for each treatment group.Immune health benefit will be evaluated using the serum albumin assay, total serum immunoglobulin, IgG and also IgA assayAss and packed cell volume (PCV). Antiparasitic effect of probiotics will be evaluated by fecal microscopy and abomasal and intestinal worm count per gram of contentsat slaughter.Total fecal lactic acid bacteria and coliforms will also be evaluated in each treatment group using microbial isolation methods and compared among treatment groups. The gut microbial diversity in each group will be evaluated using 16S sequencing and compared among treatment groups.Growth performance, final carcass quality will be evaluated by weighing the experimental animals at designated time points and also comparison of dressed weight and carcass quality at slaughter and meat analysis for nutritional characteristics. Serum collected from diffrent treatment groups will be analysed for lipid profile and cholesterol and compared amongst diffrent treatment groups. Ability of the different probiotic combinations to reduce fecal shedding of food safety pathogensand total bacterial counts in the meat products will be evaluated and compared among treatment groups during experimental period and at slaughter. Data acquired for each objective will be compared among treatment groups by ANOVA using the SAS program version 9.4.Collected data will be presented in scientific conferences, meat goat producer field days and workshops, universityundergraduate research symposiumand also published in peer reviewed scientific journals. Students will gain skills and learn through participation in various hands on activities.The project team will have planned meetings to review progress in project implementation, success stories and challenges. As part of evaluation, the team will record number of presentations in field days and producer workshops, attendance of field days and workshops and use pre and post survey questionnaires during producer workshops and field day presentation to determine acquisition of new knowledge on sustainable pathogen and parasite control by producers. Number of peer reviewed publications generated that highlight the key findings of the project will bequantified. In addition the number of presentations in scientific conferences and number of students that participate in the internships will be quantified. Impact will be measured by number of reads and citations of publications, attendance numbers and participation of data presentations by conference participants, attendance numbers and participationduring field days presenting study findings by producers, producer survey result indicating number of producers planning to implement probiotic animal supplementation at their farms and number of student participants acquiring STEM related jobs, internships or careers, pursuing professional STEM related degrees or pursuing advanced STEM research after graduation

Progress 03/01/19 to 02/28/23

Outputs
Target Audience:The target audience for the project is other scientists working on goat health, goat producers, post-doctoral researchers, undergraduate minority students,and industry partners involved in the development of goat products. Changes/Problems:Due to Covid related closures of the research labs, not all laboratory-related proposed research was accomplished during the life of the grant. However, research materials were collected that will further be evaluated to answer some of the research questions that were not completed. What opportunities for training and professional development has the project provided?Undergraduate students participated in analyzing the samples in the laboratory-acquiring workforce and research skills. Postdoctoral research associate trained undergraduate students in molecular methods The students also were trained in research data analysis and presented their research data at local and national scientific conferences. The research data generated was presented by the scientist and postdoc in scientific meetings How have the results been disseminated to communities of interest?The results have been mainly disseminated to the scientific community and students who have been audiences during presentations of research findings. Informally, the scientists have engaged producers during farm visits and field workshops, informing them of the ongoing research work. What do you plan to do during the next reporting period to accomplish the goals? Nothing Reported

Impacts
What was accomplished under these goals? Data analysis on the effect of early probiotic supplementation on overall health, growth performance, and total plasma protein was completed. Data on the effect of probiotic supplementation on microbial loads (E.coli and lactic acid bacteria), lactic acid diversity, and food safety pathogens prevalence was characterized using PCR-based molecular methods. Total DNA has been extracted, awaiting 16s sequencing and total parasite load determination. Meat samples for collecting data on final carcass product quality were processed and are currently being analyzed.

Publications

  • Type: Journal Articles Status: Submitted Year Published: 2023 Citation: Lactic acid bacteria diversity in pre-weaned goats as assessed by RAPD-PCR and 16s Ribosomal DNA sequencing
  • Type: Conference Papers and Presentations Status: Accepted Year Published: 2022 Citation: Evaluation of Diversity and Potential Beneficial Characteristics of Lactic Acid Bacteria from Adult Goats
  • Type: Conference Papers and Presentations Status: Accepted Year Published: 2022 Citation: Evaluation of Effect of Probiotic Administration on Health, Performance and select Serum Parameters in Growing Meat Goats
  • Type: Conference Papers and Presentations Status: Accepted Year Published: 2022 Citation: Evaluation of Effect of Probiotic Administration on Total Lactic Acid Bacteria and E.coli Counts in Pastured Growing Meat Goats
  • Type: Conference Papers and Presentations Status: Accepted Year Published: 2022 Citation: Age based differences in abundance and diversity of lactic acid bacteria in the gut of pastured meat goats.


Progress 03/01/21 to 02/28/22

Outputs
Target Audience:Students at Virginia State University were involved in the project and acquired skills in microbiology and molecular biology A postdoctoral associate was trained in molecular methods, data analysis, microbiology Changes/Problems:Interruption by Covid-19 related closures of the institution made it difficult to complete planned laboratory work. What opportunities for training and professional development has the project provided? Nothing Reported 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?Complete data analysis, develop manuscripts for publication Present data in conferences. Complete analysis of fecal samples for pathogenic bacteria( animal and human)and parasitic pathogens using molecular tools Analyze meat samples Complete serum sample analysis for relevant hematological parameters(e.g. total serum proteins, antibodies (ELISA) Complete total stool DNA extraction and send for sequencing Mentor undergraduate students and postdoctoral trainee

Impacts
What was accomplished under these goals? The overall goal of the project is to generate research-based data on the benefits of probiotic supplementation in healthy goats of different age groups Objective 1: In addition to overall health and growth development, we have evaluatedtotal lactic acid bacteria and E.coli counts between probiotic supplemented and non-supplemented groups. We have evaluated the lactobacillus diversity in control vs probiotic treated animals using RAPD and genomic sequencing We have extracted total fecal DNA for 16s sequencing for some of the samples Students were involved in laboratory processing of samples(microbiology and molecular biology skills)

Publications


    Progress 03/01/20 to 02/28/21

    Outputs
    Target Audience:The main target audience reached by the project during this period was undergraduate students and postdoctoral trainees. Undergraduate students participated in field sample collection from animals involved in the experiment and also laboratory processing of samples. The postdoctoral trainee was involved in the laboratory processing of the samples during the same period. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?This has been a training opportunity for undergraduate students in STEM research and laboratory skills and also postdoctoral trainees in research methods and laboratory techniques. All offered by PI. 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?The next step is to complete data analysis and compare probiotic supplemented and non-supplemented groups. The team will analyze serum samples by ELISA for immune health benefits, meat samples for meat quality analysis, fecal samples for parasite and pathogenic bacteria analysis, and analyze food safety pathogens. Sequencing of lactobacillus isolates and typing to confirm establishment in the goat gut will follow. Next, we will be analyzing overall microbial diversity in probiotic supplemented vs non- supplemented goats and then finally running a three-month probiotictrial with peri-weaning goats with strains known to have antiparasitic effects.

    Impacts
    What was accomplished under these goals? This project is aimed at evaluating the health benefits (or lack of) of early probiotic supplementation in young goat kids as well as offering training opportunities for students to acquire STEM skills. Potential benefits hypothesized are improved performance,decreased pathogenic bacteria, reduced parasite loads, higher-quality meat products, and a well-trained/skilled agricultural workforce. For objectives 1-4the first trial of the experiment with newborn goat kids until 10months of age has been completed. Animals were monitored, weights were collected, serum and fecal samples have been collected and partially processed in the laboratory. Animals have been slaughtered and meat samples are waiting for analysis. For objective 5, several students were involved in sample collection and laboratory processing, acquiring hands-on skills in animal handling, sample collections, microbiology, hematology, and molecular biology.

    Publications


      Progress 03/01/19 to 02/29/20

      Outputs
      Target Audience:The target audience reached so far are undergraduate students. Animal science students at Virginia State University had a experiential learning opportunities bypaticipatingin research activities accomplished during the year. These includedfecal sample collection, weighing animals, treatment administration. laboratory processing of fecal samples, serum and plasma extraction, microscopy, microbial isolation and microbial DNA extraction. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?Training opportunities have been offered to undergraduate students by PI (Dr. Ndegwa and Dr. Kim) during animal studies and during laboratory activites (microbial isolation, blood sample processing, microscopy and molecular techniques). 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?Laboratory analysis of serum and plasma samples-Immune markers, choresterol, lipids Microbial characterization and quantification-E.coli and Lactic acid bacteria DNA exteraction from fecal samples 16S sequencing Parasite quantification in fecal samples Meat quality analysis Data analysis Continue working with undergraduate students

      Impacts
      What was accomplished under these goals? All the major goals listed above are in the process of being accomplished after first experimental trial. Data on growth perfomance and healthis under analysis, Research samples (serum, fecal, samples, meat samples) have been collected and are awaiting laboratory analysis to accomplish goals i), ii), iii) and iv. Animal science students have been actively engaged in animal and laboratory studies.

      Publications