Life Sciences Commons^™

Anthelmintic Resistance In Sheep Across Ireland And The Uk: A Literature Review Of The In Vivo Versus In Vitro Methods, Megan Tumulty

SURE Journal: Science Undergraduate Research Experience Journal

Background: The animal welfare and production consequences of gastrointestinal nematode infections, namely Nematodirus battus, on sheep are compelling. The control of gastrointestinal infections has been heavily reliant on the administration of anthelmintics since their introduction into mainstream use in 1960. However, their frequent and often excessive use has resulted in anthelmintic resistance being reported extensively in several gastrointestinal nematode species. The prevalence of anthelmintic resistance as well as the increase in the number of cases of multiple-drug resistance in nematode populations now poses substantial hindrance on the viability of sheep production systems. However, despite the threat N. battus poses …

Environmental Determination Of Gastrointestinal Parasitism In Katahdin Sheep, Brian Arisman

Department of Animal Science: Dissertations, Theses, and Student Research

Gastrointestinal nematodes (GIN) negatively affect the performance and wellbeing of sheep and are difficult to control due to anthelmintic resistance. Producers are therefore choosing breeds naturally resistant to GIN infection, such as the Katahdin. Katahdin are raised in various climates and management systems in the U.S., and those environmental factors can be combined into eco-management clusters. We hypothesized that GIN challenge varies predictably based on the characteristics of these clusters. Katahdin producers from across the U.S. were surveyed for management information. Body weights (BW), fecal egg counts (FEC) and FAMACHA scores (FAM) were collected on 3,527 Katahdin lambs around 90 …

Using Condensed Tannin To Mitigate Tall Fescue Toxicosis, Ally Jo Grote

Graduate Theses and Dissertations

Endophyte-infected (Neotyphodium coenophialum) tall fescue, [Schedonorus arundinaceus (Shreb.)] produces ergot alkaloids. Condensed tannins could bind to ergot alkaloids and render them ineffective. The first objective was to improve the health of sheep offered endophyte-infected tall fescue by binding toxins in the rumen with condensed tannins. Non-toxic novel-endophyte infected tall fescue (NE) or toxic endophyte-infected tall fescue forage was harvested, baled at targeted moisture of 55%, wrapped within 8 hours of baling with 2 layers of net wrap and 20 layers of plastic, and ensiled for at least 60 days. Prior to feeding, forages were chopped and packed into plastic trash …

Validation Of The Irish National Sheep Genetic Evaluations, Niamh Barry

ORBioM (Open Research BioSciences Meeting)

Background: In Ireland, national sheep genetic evaluations have been implemented since 2009, however, to date no large scale study has been undertaken to investigate the accuracy of genetic evaluations in a large multi-breed population. The aim of this study was to validate the estimated breeding values (EBV) on a range of traits, using national data comprising 203,469 records across a range of phenotypic traits from 9,377 flocks.

Methods: The association between direct and maternal EBV on a range of lamb growth traits was quantified using a fixed effects model. For the lambing traits the association between direct and maternal EBV …

Oestrogenic Subterranean Clover Guide. Identification And Remediation, Kevin J. Foster, Megan H. Ryan, Daniel R. Kidd

Bulletins 4000 -

Subterranean clover (subclover, Trifolium subterraneum L.) is an annual pasture legume that provides high quality feed for livestock. It is estimated to be sown over 30 million hectares across southern Australia, with cultivars developed for the low, medium and high rainfall zones. Unfortunately, some older cultivars contain high levels of phytoestrogen which can affect the reproductive system of sheep and cause other health issues. This became a significant issue for sheep producers from the 1940s as new land was cleared and sheep grazed subclover-dominant pastures. There was a collection of livestock issues observed and these were grouped together under the …

The Effects Of Poor Maternal Nutrition During Gestation In Sheep On The Reproductive Efficiency Of The Offspring, Morgan Dougherty

Honors Scholar Theses

Poor maternal nutrition during gestation negatively impacts fetal programming and the development of the hypothalamic-pituitary-ovarian axis in the offspring. Reproductive health of ewes can be characterized by concentrations of reproductive hormones including follicle stimulating hormone (FSH), luteinizing hormone (LH), and progesterone, particularly during the estrous cycle. We hypothesized that ewes born to dams that experienced poor maternal nutrition during gestation would have reduced reproductive capability and efficiency. This means that they would take longer to become pregnant and have reduced concentrations of reproductive hormones compared with those born to mothers fed the control diet. Pregnant dams (F0) were fed one …

Effects Of Increasing Dietary Zinc Sulfate Fed To Gestating Ewes: Ii. Milk Somatic Cell Count, Microbial Populations, And Fatty Acid Composition, C. M. Page, R. M. Knuth, T. W. Murphy, D. C. Rule, B. Bisha, J. B. Taylor, W. C. Stewart

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Objective: The objective of the research was to evaluate the effects of increasing dietary Zn sulfate concentration for primiparous gestating ewes on subsequent milk SCC, intramammary microbial identifications, and fatty acid composition.

Materials and Methods: Commercial white-face (WF; n = 27) and black-face (BF; n = 24) ewes (age ≈18 mo; BW = 87.48 ± 8.37 kg) were sorted into breed-type groups and within groups ranked by BW, and then, they were randomly divided into 3 dietary supplement treatment groups: CON (n = 13; 40 mg/kg Zn; ≈1 × NASEM recommendations), Zn500 (n = 21; 500 mg/kg Zn; …

Anatomical And Histological Structures Of Eye And Lacrimal Gland In Norduz Andmorkaraman Sheep, Semi̇ne Dalga, Serap İlhan Aksu, Kadi̇r Aslan, Turgay Deprem, Reşi̇t Uğran

Turkish Journal of Veterinary & Animal Sciences

The current study was conducted to determine the morphological, morphometric, and histological characteristics of bulbus oculi and lacrimal gland in sheep. For this purpose, 28 pairs (n = 7 males and n = 7 females) of bulbus oculi from Morkaraman and (n = 7 males and n = 7 females) Norduz sheep were analyzed. The bulbus oculi in the skulls were dissected from the orbit and removed. The morphometric data such as distance between endpoints of the dissected bulbus oculi in temporal, nasal, and dorsal directions, the length between endpoints of the pupil in dorsal and ventral directions, and as …

Some Hematological Parameters And Enzyme Histochemistry Of Peripheral Bloodleukocytes In Kivircik Sheep, Mehmet Faruk Aydin, İhsan Kisadere

Turkish Journal of Veterinary & Animal Sciences

The aim of the present study was to determine some hematological parameters (RBC, WBC, HCT, HGB, MCH, MCHC, MCV, and PLT), the presence and percentages of ANAE and AcP-ase positivities in leukocytes and the differential leukocyte count in Kivircik sheep. Blood samples were taken from the jugular vein of 40 (rams = 20; ewes= 20) healthy, 1-year-old sheep. MCH and MCHC values were found statistically higher in rams than ewes (p < 0.05). Mean percentages of ANAE-positive PBL were defined as 74.16 ± 11.94% in ewes and 70.33 ± 8.39% in rams. It was not determined any significant changes according to sex. On the other hand, the percentages of ACP were determined as 67.12 ± 6.54% in ewes and 66.71 ± 6.58% in rams. It was not found any significant differences according to sex. For ANAE enzyme activity, lymphocytes, monocytes, neutrophils, and eosinophilic granulocytes showed a positive reaction. For ACP enzyme activity, although lymphocytes presented positivity, monocytes, neutrophils, eosinophils were negative. The ratio of lymphocyte, monocyte, neutrophile, eosinophile, and basophile of Kivircik ewes and rams were found as 64.35 ± 5.74%, 60.64 ± 8.85%; 3.41 ± 1.27%, 3.82 ± 1.42%; 27.58 ± 5.46%, 30.94 ± 8.71%; 2.41 ± 0.93%, 2.88 ± 1.45%; 1.76 ± 0.75%, 1.29 ± 0.58%, respectively. The difference between mean values was not found significant according to sex (p > 0.05). In conclusion, our study showed that enzyme histochemical methods can be used for identifying peripheral blood cells and can provide facilitates for early diagnosis of immune system-related disorders …

Relationships Between Famacha Scores And Some Blood Values In Sheep And Goats, Özcan Şahi̇n, İbrahi̇m Ayteki̇n, Sai̇m Boztepe, İsmai̇l Keski̇n, Ali̇ Karabacak, Yasi̇n Altay, Mervan Bayraktar

Turkish Journal of Veterinary & Animal Sciences

In this study, Akkaraman sheep and Hair goats raised extensively on the same farm were scored with the FAMACHA card. Score 1 was not present in both sheep and goats, whereas scores 5 and 2 were not detected in sheep and goats, respectively. While the number of animals with scores of 2, 3, and 4 was 9, 46, and 55 in sheep, the number of animals with 3, 4, and 5 scores in goats was 6, 55, and 41, respectively. In the study, the differences in the amount of RBC, Hct, and Hb in goats according to these score groups …

Sheep And Goat Industry Funding Scheme Annual Report 2020/2021, Department Of Primary Industries And Regional Development, Western Australia

Biosecurity published reports

The Sheep and Goat Industry Funding Scheme (IFS) has been operating since 2010 to address biosecurity threats relevant to the Western Australian (WA) sheep and goat industry. The Scheme was established by regulation under the Biosecurity and Agriculture Management Act 2007 to enable sheep and goat producers to identify pest and disease priorities at a whole-of-industry level and raise funds for activities to address these priorities.

There are currently three Industry Funding Schemes in operation. In addition to the Sheep and Goat IFS, there is a Cattle IFS and a Grains, Seeds and Hay IFS. The three IFSs operate in …