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Relación entre el estado serológico a leucosis bovina enzoótica y parámetros reproductivos en hatos lecheros especializados de Costa Rica
(Universidad Nacional, Costa Rica, 2015-03-04)
Se realizó un estudio longitudinal y analítico para determinar la relación entre el estado serológico al virus de la leucosis bovina enzoótica (VLBE) y los parámetros reproductivos, en 26 fincas lecheras de Costa Rica ...
Efecto del estatus serológico al virus de la leucosis enzoótica bovina (BLV) sobre la producción de leche en hatos lecheros de Costa Rica
(Universidad Nacional, Costa Rica, 2012-09-02)
Se realizó un estudio longitudinal para determinar el efecto del estatus serológico
al virus de la leucosis enzoótica bovina (BLV) sobre la producción de leche en hatos lecheros
especializados de Costa Rica. Se analizó ...
Evaluation of a voluntary control program for the detection of Bovine Leukemia Virus antibodies based on agar gel immunodiffusion test in dairy farms in Costa Rica
(Universidad Nacional, Costa Rica, 2015-05-02)
A total of 20 farms were analyzed repeatedly during five years using only the agar gel immunodiffusion
test (AGIDT) as part of a voluntary control program of Bovine Leukemia Virus (BLV). After
five years of cleaning up ...
The NS segment of H5N1 avian influenza viruses (AIV) enhances the virulence of an H7N1 AIV in chickens
(Veterinary Research, 2014-01-25)
Some outbreaks involving highly pathogenic avian influenza viruses (HPAIV) of subtypes H5 and H7 were caused by avian-to-human transmissions. In nature, different influenza A viruses can reassort leading to new viruses ...
Neuroinvasion of the highly pathogenic influenza virus H7N1 is caused by disruption of the blood brain barrier in an avian model
(PLOS ONE, 2014-12-15)
Influenza A virus (IAV) causes central nervous system (CNS) lesions in avian and mammalian species, including humans. However, the mechanism used by IAV to invade the brain has not been determined. In the current work, we ...
The effect of the dam–calf relationship on serostatus to Neospora caninum on 20 Costa Rican dairy farms
(Universidad Nacional, Costa Rica, 2003-03-31)
An epidemiological study was conduced on 20 dairy herds previously diagnosed as seropositive
for Neospora caninum. The number of females per farm varies from 41 to 296. All females present
on the farms were bled once in ...
Presence of Maedi-Visna in Costa Rican sheep flocks
(Small Ruminant Research, 2015-01-22)
A total of 359 sheep serum samples from 15 farms were analyzed for the presence of antibodies against Maedi Visna Virus (MVV) by Enzyme-linked Immunosorbent Assay (ELISA). Additionally, a survey was applied to the sheep ...
BvrR/BvrS-controlled outer membrane proteins Omp3a and Omp3b are not essential for Brucella abortus virulence
(American Society for Microbiology, 2007-07-30)
The Brucella abortus two-component regulatory system BvrR/BvrS controls the expression of outer membrane proteins (Omp) Omp3a (Omp25) and Omp3b (Omp22). Disruption of bvrS or bvrR generates avirulent mutants with altered ...
Serological detection of viral infections in captive wild cats from Costa Rica
(Veterinary Medicine International, 2011-02-08)
Serum samples from a total of 44 wildcats, 28 margays (Leopardus wiedii), 10 ocelots (Leopardus pardalis), four jaguaroundis (Herpailurus yaguaroundi), one oncilla (Leopardus tigrina), and one jaguar (Panthera onca) were ...
White spot syndrome virus and Enterocytozoon hepatopenaei in shrimp farms in Costa Rica
(Universidad de Costa Rica, 2020-03-04)
Introduction. The white spot syndrome virus (WSSV) causes systemic destruction of ectodermal and mesodermal tissues in shrimp and can cause 100 % mortality. Enterocytozoon hepatopenaei (EHP) is an intracellular ...