Role of nitrergic nerves in the regulation of motility of the omasum and abomasum in healthy sheep (Ovis aries)

2008 ◽  
Vol 33 (1) ◽  
pp. 33-48 ◽  
Author(s):  
Takenori Onaga ◽  
Noriko Hara ◽  
Yasuhito Shimizu
Keyword(s):  
Ovis Aries ◽  
Healthy Sheep ◽  
Nitrergic Nerves

scholarly journals Role of O-polysaccharide antigen made from B. melitensis in the differential diagnosis of brucellosis in small ruminants

2021 ◽  
Author(s):  
P.K. Arakelyan ◽  
A.S. Dimova ◽  
A.V. Rudenko ◽  
N.V. Khristenko ◽  
V.T. Wolf ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Blood Serum ◽  
Small Ruminants ◽  
Natural Course ◽  
Primary Immunization ◽  
Serum Samples ◽  
Polysaccharide Antigen ◽  
Objective Indicator ◽  
Healthy Sheep

Out of 2942 blood serum samples from small ruminants of 10 flocks with a natural course of brucellosis caused by B. melitensis, 322 samples reacted with both antigens in the RID, of which 90 samples only with the O-PS M antigen (from B. melitensis), only with O-PS A-antigen (from B. abortus) reactive was not revealed. In healthy sheep immunized against brucellosis with the vaccine from strain 19 according to different schemes, only the O-PS M antigen was not found to react. Reaction with O-PS A- and M-antigens was observed in animals that were immunized twice subcutaneously at a dose of 40 billion mc. - after 2 months. after revaccination (60%), as well as in those reimmunized conjunctivally at a dose of 4 billion mc. according to the background of primary immunization subcutaneously at a dose of 40 billion mc. (10%) In animals immunized once or twice conjunctivally, reacting in RID with both antigens was not detected. Out of 2432 blood serum samples of small ruminants, 10 flocks with a brucellosis problem immunized against brucellosis with a vaccine from B.abortus strain 19 according to different schemes, 151 samples (6.2%) reacted positively with both O-PS antigens in RID with both O-PS antigens, of which only 86 samples (56.9%) reacted with O-PS M-antigen. The prevalence of indications of RID with O-PS M-antigen over RID with O-PS A-antigen (O-PS antigen made from Brucellae abortus) in small ruminants in one or another flock is characteristic of infection caused by brucellae melitensis at least in the absence, at least in the presence of the fact of immunization with a vaccine from the B. abortus 19 strain. RID with O-PS M-antigen is an objective indicator of epizootic danger and is able to differentiate brucellosis (B. melitensis) in small ruminants from vaccination-induced reactions (B. abortus 19).

Detection of bovine Deltapapillomavirus DNA in peripheral blood of healthy sheep (Ovis aries )

2018 ◽  
Vol 65 (3) ◽  
pp. 758-764 ◽  
Author(s):  
S. Roperto ◽  
V. Russo ◽  
F. Corrado ◽  
J. S. Munday ◽  
F. De Falco ◽  
...  
Keyword(s):  
Peripheral Blood ◽  
Ovis Aries ◽  
Healthy Sheep

scholarly journals The role of N6-methyladenosine RNA methylation in the heat stress response of sheep (Ovis aries)

2019 ◽  
Vol 24 (2) ◽  
pp. 333-342 ◽  
Author(s):  
Zengkui Lu ◽  
Youji Ma ◽  
Qing Li ◽  
Enmin Liu ◽  
Meilin Jin ◽  
...  
Keyword(s):  
Heat Stress ◽  
Stress Response ◽  
Ovis Aries ◽  
Heat Stress Response ◽  
Rna Methylation

Vocal discrimination of kin and non-kin agemates among lambs

Behaviour ◽  
2004 ◽  
Vol 141 (3) ◽  
pp. 355-369 ◽  
Author(s):  
Frédéric Sebe ◽  
Séverine Ligout ◽  
Richard Porter
Keyword(s):  
Fundamental Frequency ◽  
Social Recognition ◽  
Ovis Aries ◽  
Social Discrimination ◽  
Playback Experiments ◽  
Auditory Cues ◽  
Vocal Signatures ◽  
Acoustic Analyses ◽  
Vocal Discrimination

AbstractPlayback experiments were conducted with 4 week old Ile-de-France lambs (Ovis aries) to assess the role of auditory cues in social discrimination. After being habituated to the test enclosure, lambs were individually exposed to bleats from two stimulus individuals. Twin lambs were tested with recorded bleats of their sibling versus an unfamiliar agemate and single lambs with bleats of a familiar agemate versus an unfamiliar lamb. Lambs responded more frequently to the bleats of their sibling (for twin lambs) or of a familiar agemate (for single lambs) than to those of an unfamiliar lamb. Such discriminative responses to the bleats of familiar twins and non-kin lambs suggest that vocalizations may be a sufficient basis for social recognition. Acoustic analyses of the playback bleats revealed significant differences between the signals from the different stimulus lambs and suggest that fundamental frequency may be an important parameter of lambs' individual vocal signatures.

scholarly journals Role of staphylococci in mastitis in sheep

2019 ◽  
Vol 86 (3) ◽  
pp. 254-266 ◽  
Author(s):  
Natalia G. C. Vasileiou ◽  
Dimitris C. Chatzopoulos ◽  
Stela Sarrou ◽  
Ilektra A. Fragkou ◽  
Angeliki I. Katsafadou ◽  
...  
Keyword(s):  
Antibacterial Agents ◽  
The Body ◽  
Control Measures ◽  
Virulence Determinants ◽  
Mechanisms Of Resistance ◽  
Potential Significance ◽  
Isolation And Identification ◽  
Healthy Sheep ◽  
Sources Of Infection

AbstractStaphylococci have been isolated from various sites of the body of healthy sheep, as well as from many infections of those animals, the main one being mastitis. The objective of this review is to appraise the importance and significance of staphylococci in causing mastitis in ewes. The review includes a brief classification and taxonomy of staphylococci and describes the procedures for their isolation and identification, as well as their virulence determinants and the mechanisms of resistance to antibacterial agents. Various staphylococcal species have been implicated in staphylococcal mastitis and the characteristics of isolates are discussed with regards to potential virulence factors. Staphylococcal mastitis is explicitly described, with reference to sources of infection, the course of the disease and the relevant control measures. Finally, the potential significance of staphylococci present in ewes’ milk for public health is discussed briefly.

scholarly journals The oligomeric assembly of galectin-11 is critical for anti-parasitic activity in sheep (Ovis aries)

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Dhanasekaran Sakthivel ◽  
Sarah Preston ◽  
Robin B. Gasser ◽  
Tatiana P. Soares da Costa ◽  
Julia N. Hernandez ◽  
...  
Keyword(s):  
Selective Breeding ◽  
Inflammatory Responses ◽  
Gastrointestinal Nematodes ◽  
Ovis Aries ◽  
Parasitic Nematodes ◽  
Cellular Functions ◽  
Genetic Studies ◽  
Oligomeric Assembly ◽  
Parasitic Activity

AbstractGalectins are a family of glycan-binding molecules with a characteristic affinity for ß-D-glycosides that mediate a variety of important cellular functions, including immune and inflammatory responses. Galectin-11 (LGALS-11) has been recently identified as a mediator induced specifically in animals against gastrointestinal nematodes and can interfere with parasite growth and development. Here, we report that at least two natural genetic variants of LGALS-11 exist in sheep, and demonstrate fundamental differences in anti-parasitic activity, correlated with their ability to dimerise. This study improves our understanding of the role of galectins in the host immune and inflammatory responses against parasitic nematodes and provides a basis for genetic studies toward selective breeding of animals for resistance to parasites.

The role of sheep (Ovis aries) in maintaining Theileria orientalis Ikeda type infection

2021 ◽  
Vol 291 ◽  
pp. 109391
Author(s):  
K.E. Lawrence ◽  
K. Gedye ◽  
R. Hickson ◽  
B. Wang ◽  
L. Carvalho ◽  
...  
Keyword(s):  
Ovis Aries ◽  
Theileria Orientalis ◽  
Type Infection

scholarly journals RIG-I has a role in immunity against Haemonchus contortus, a gastrointestinal parasite in Ovis aries- a novel report

2020 ◽  
Author(s):  
Samiddha Banerjee ◽  
Aruna Pal ◽  
Abantika Pal ◽  
Subhas Chandra Mandal ◽  
Paresh Nath Chatterjee ◽  
...  
Keyword(s):  
Haemonchus Contortus ◽  
Germ Line ◽  
Model Organism ◽  
Infected Sheep ◽  
Ovis Aries ◽  
Rna Helicases ◽  
Mrna Expression Analysis ◽  
Molecular Patterns ◽  
I Gene

AbstractRIG-I is associated to the DExD/H box RNA Helicases. It is a Pattern Recognition Receptor (PRR), playing a crucial role in the system and is a germ line encoded host sensor to perceive Pathogen Associated Molecular Patterns or PAMPs. So far reports were available for the role of RIG-I in antiviral immunity. This is the first report we have documented the role of RIG-I in parasitic immunity. Haemonchus contortus is a deadly parasite affecting sheep industry which has a tremendous economic importance and the parasite reported to be prevalent in the hot and humid agroclimatic region. We had characterized RIG-I gene in sheep (Ovis aries) and identified the important domains or binding site with Haemonchus contortus through in silico studies. Differential mRNA expression analysis revealed upregulation of RIG-I gene in abomassum of infected sheep compared to that of healthy sheep, further confirming the findings. Thus it is evident that in infected sheep, expression of RIG-I is triggered for binding to more pathogen (Haemonchus contortus). Genetic similar studies with human and other livestock species were conducted to reveal that sheep may be efficiently used a model organism for studying the role of RIG-I in antiparasitic immunity of human.

scholarly journals RIG-I Has a Role in Immunity Against Haemonchus contortus, a Gastrointestinal Parasite in Ovis aries: A Novel Report

2021 ◽  
Vol 11 ◽  
Author(s):  
Samiddha Banerjee ◽  
Aruna Pal ◽  
Abantika Pal ◽  
Subhas Chandra Mandal ◽  
Paresh Nath Chatterjee ◽  
...  
Keyword(s):  
Haemonchus Contortus ◽  
Germ Line ◽  
Model Organism ◽  
Infected Sheep ◽  
Ovis Aries ◽  
Rna Helicases ◽  
In Silico Studies ◽  
Mrna Expression Analysis ◽  
I Gene

Retinoic acid inducible gene I (RIG-I) is associated to the DExD/H box RNA helicases. It is a pattern recognition receptor (PRR), playing a crucial role in the system and is a germ line encoded host sensor to perceive pathogen-associated molecular patterns (PAMPs). So far, reports are available for the role of RIG-I in antiviral immunity. This is the first report in which we have documented the role of RIG-I in parasitic immunity. Haemonchus contortus is a deadly parasite affecting the sheep industry, which has a tremendous economic importance, and the parasite is reported to be prevalent in the hot and humid agroclimatic region. We characterize the RIG-I gene in sheep (Ovis aries) and identify the important domains or binding sites with Haemonchus contortus through in silico studies. Differential mRNA expression analysis reveals upregulation of the RIG-I gene in the abomasum of infected sheep compared with that of healthy sheep, further confirming the findings. Thus, it is evident that, in infected sheep, expression of RIG-I is triggered for binding to more pathogens (Haemonchus contortus). Genetically similar studies with humans and other livestock species were conducted to reveal that sheep may be efficiently using a model organism for studying the role of RIG-I in antiparasitic immunity in humans.

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