scholarly journals Difference in virulence betweenStaphylococcus aureusisolates causing gangrenous mastitis versus subclinical mastitis in a dairy sheep flock

2009 ◽  
pp. 56 ◽  
Author(s):  
Eric Vautor ◽  
Joshua Cockfield ◽  
Caroline Le Marechal ◽  
Yves Le Loir ◽  
Marlène Chevalier ◽  
...  
Keyword(s):  
Subclinical Mastitis ◽  
Sheep Flock ◽  
Dairy Sheep

scholarly journals Subclinical mastitis in a pampinta dairy sheep flock in the la pampa province

2021 ◽  
Vol 31 (1) ◽  
pp. 17-23
Author(s):  
Stazionati Micaela Fiorela ◽  
Keyword(s):  
Threshold Model ◽  
Subclinical Mastitis ◽  
Sheep Flock ◽  
Dairy Sheep ◽  
El Sistema

Se han estudiado aspectos de la oveja Pampinta, una raza sintética desarrollada en la EEA de Anguil, constituida por Frisona del Este (East Friesian) y Corriedale. Es considerada de triple propósito (carne, leche y lana), pero seleccionada fenotípicamente hacia la raza Frisona del Este, siendo una de las principales razas que se la utiliza en ordeñe en Argentina. El objetivo de este trabajo es describir las mastitis subclínicas (MSC) que ocurren en la majada del Tambo Modelo de la Experimental de Anguil, con datos recogidos en los controles lecheros entre los años 2009 y 2014. Se utilizó un modelo animal con efectos aleatorios y efectos fijos como edad al parto; año de lactancia; tipo de cría y parto y clase de producción lechera. Se utilizó el programa estadístico SAS para los datos de producción y un Threshold Model (TM, Legarra et al., 2008) para mastitis. La producción de leche no estuvo relacionada con la incidencia de mastitis. El recuento de células somáticas (RCS) varía a lo largo de la lactancia, teniendo valores elevados al comienzo, luego desciende y se mantiene. La edad, la presencia de MSC y el nivel de producción de leche son factores que influyen en el RCS. El ambiente donde se encuentren lo animales puede tener factores estresantes que pueden interferir en el sistema inmunológico. Se necesitan más estudios y en otros establecimientos para poder generalizar estos resultados, lo que si hay que tener en cuenta que existe una demanda en los procesos de selección.

Kinetics of Coxiella burnetii excretion in a commercial dairy sheep flock after treatment with oxytetracycline

2010 ◽  
Vol 184 (2) ◽  
pp. 172-175 ◽  
Author(s):  
Ianire Astobiza ◽  
Jesús F. Barandika ◽  
Ana Hurtado ◽  
Ramón A. Juste ◽  
Ana L. García-Pérez
Keyword(s):  
Coxiella Burnetii ◽  
Sheep Flock ◽  
Dairy Sheep ◽  
Kinetics Of

scholarly journals Four-Year Evaluation of the Effect of Vaccination against Coxiella burnetii on Reduction of Animal Infection and Environmental Contamination in a Naturally Infected Dairy Sheep Flock

2011 ◽  
Vol 77 (20) ◽  
pp. 7405-7407 ◽  
Author(s):  
Ianire Astobiza ◽  
Jesús F. Barandika ◽  
Francisco Ruiz-Fons ◽  
Ana Hurtado ◽  
Inés Povedano ◽  
...  
Keyword(s):  
Phase I ◽  
Coxiella Burnetii ◽  
Environmental Contamination ◽  
Sheep Flock ◽  
Dairy Sheep ◽  
Content Type ◽  
Animal Infection

ABSTRACTVaccination is considered one of the best options for controllingCoxiella burnetiiinfection in livestock. The efficacy of a phase I vaccine was investigated over 4 years in a sheep flock with confirmedC. burnetiiinfection. Shedding was not detected in ewes and yearlings in the last 2 years, butC. burnetiistill persisted in the environment.

Economic and epidemiological aspects of an outbreak of sheeppox in a dairy sheep flock

2007 ◽  
Vol 160 (7) ◽  
pp. 236-237 ◽  
Author(s):  
I. Yeruham ◽  
H. Yadin ◽  
M. Van Ham ◽  
V. Bumbarov ◽  
A. Soham ◽  
...  
Keyword(s):  
Sheep Flock ◽  
Dairy Sheep

scholarly journals Characterization of 26 Isolates of Staphylococcus Aureus, Predominantly from Dairy Sheep, Using Four Different Techniques of Molecular Epidemiology

2005 ◽  
Vol 17 (4) ◽  
pp. 363-368 ◽  
Author(s):  
Eric Vautor ◽  
Corinne Jay ◽  
Nicolas Chevalier ◽  
Nathalie Visomblin ◽  
Guy Vernet ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Molecular Epidemiology ◽  
Subclinical Mastitis ◽  
Epidemiological Surveillance ◽  
Dairy Sheep ◽  
Control Programs ◽  
Rapd Pcr ◽  
Single Clone ◽  
Mastitis Control

Little information is available regarding the molecular epidemiology of Staphylococcus aureus–induced mastitis in dairy sheep. In this study, 4 different typing techniques were compared in typing 26 S. aureus isolates, predominantly from cases of subclinical mastitis in dairy ewes. The 4 techniques were pulsed-field gel electrophoresis (PFGE), restriction fragment length polymorphism (RFLP) on 2 genes (coagulase and clumping factor B), randomly amplified polymorphic DNA–polymerase chain reaction (PCR) (RAPD-PCR), and multilocus sequence typing (MLST). On the basis of discriminatory power as the key parameter of typing systems, MLST and PFGE were found to be the most powerful techniques. The MLST and PFGE could contribute to epidemiological surveillance and evaluation of mastitis control programs, by documenting prevalence and dissemination of endemic clones in infected populations. The results of this study show that a single clone of S. aureus is widely distributed in infected ewe mammary glands.

Effect of abiotic and biotic factors on subclinical mastitis occurrence in low-input dairy sheep production systems

2021 ◽  
Vol 198 ◽  
pp. 106341
Author(s):  
N. Tzanidakis ◽  
C.N. Brozos ◽  
N. Voutzourakis ◽  
A. Stefanakis ◽  
E. Malama ◽  
...  
Keyword(s):  
Production Systems ◽  
Subclinical Mastitis ◽  
Biotic Factors ◽  
Dairy Sheep ◽  
Low Input ◽  
Sheep Production ◽  
Abiotic And Biotic Factors

scholarly journals Dynamics of Neospora caninum-Associated Abortions in A Dairy Sheep Flock and Results of a Test-and-Cull Control Programme

Pathogens ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1518
Author(s):  
Roberto Sánchez-Sánchez ◽  
Ángela Vázquez-Calvo ◽  
Mercedes Fernández-Escobar ◽  
Javier Regidor-Cerrillo ◽  
Julio Benavides ◽  
...  
Keyword(s):  
Neospora Caninum ◽  
Horizontal Transmission ◽  
Control Programme ◽  
Abortion Rate ◽  
Sheep Flock ◽  
Dairy Sheep ◽  
Lack Of Information ◽  
Infection Dynamics ◽  
Route Of Transmission ◽  
The Relationship

Neospora caninum is an apicomplexan parasite that can cause abortions and perinatal mortality in sheep. Although ovine neosporosis has been described worldwide, there is a lack of information about the relationship between N. caninum serostatus and the reproductive performance. In this study, we described the infection dynamics in a dairy sheep flock with an abortion rate up to 25% and a N. caninum seroprevalence of 32%. Abortions were recorded in 36% and 9% of seropositive and seronegative sheep, respectively. Seropositive sheep were more likely to abort twice (OR = 4.44) or three or more times (OR = 10.13) than seronegative sheep. Endogenous transplacental transmission was the main route of transmission since 86% of seropositive sheep had seropositive offspring. Within dams that had any abortion, seropositive sheep were more likely than seronegative ones to have female descendants that aborted (OR = 8.12). The slight increase in seropositivity with the age, the low percentage of animals with postnatal seroconversion or with low avidity antibodies, and the seropositivity of one flock dog, indicated that horizontal transmission might have some relevance in this flock. A control programme based on selective culling of seropositive sheep and replacement with seronegative animals was effective in reducing the abortion rate to 7.2%.

Field evidence for association between increased gastrointestinal nematode burden and subclinical mastitis in dairy sheep

2019 ◽  
Vol 265 ◽  
pp. 56-62 ◽  
Author(s):  
N.G. Kordalis ◽  
K. Arsenopoulos ◽  
N.G.C. Vasileiou ◽  
V.S. Mavrogianni ◽  
D.T. Lianou ◽  
...  
Keyword(s):  
Gastrointestinal Nematode ◽  
Subclinical Mastitis ◽  
Dairy Sheep ◽  
Field Evidence

Toxoplasma Abortions in a Dairy Sheep Flock

2010 ◽  
Vol 143 (4) ◽  
pp. 329
Author(s):  
N.D. Giadinis ◽  
K. Terpsidis ◽  
A. Diakou ◽  
V. Siarkou ◽  
P. Loukopoulos ◽  
...  
Keyword(s):  
Sheep Flock ◽  
Dairy Sheep
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