Herráiz Hidalgo

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The interference phenomenon of infectious bronchitis virus (IBV) with growth of Newcastle disease virus (NDV) in embryonating chicken eggs (ECE) was used as a diagnostic method. Fifteen field isolates obtained from presumptively infectious-bronchitis-affected chickens were analyzed by the IBV-NDV interference test. Eight isolates were capable of interfering(More)
Seven isolants of infectious bronchitis virus (IBV) interfered with the development of hemagglutinins (HA) by the B-1 isolant of Newcaslte disease virus (NDV) in eggs previously inoculated with these IBV isolants. The I50 [defined as the minimum amount of IBV needed to produce, upon inoculation in embryonating chicken eggs (ECE), HA interference in 50% of(More)
A screening of antibodies against strain M-41 and the Dutch variant strains D-274 and D-1466 of infectious bronchitis virus (IBV) using the haemagglutination inhibition test (HI) was carried out in Chile. The presence of these variant strains has not been reported yet and therefore the probability of finding positive flocks is low. On this basis some(More)
An infectious-bronchitis-like virus was isolated from 6-week-old broiler chickens unvaccinated with infectious bronchitis virus (IBV). The isolate produced lesions in embryonating chicken eggs (ECE) and clinical signs in birds characteristic of IBV. Serum-neutralization and agar-gel diffusion tests demonstrated the serological relationship of this isolate(More)
In the period from July 2008 to 2010, a disease episode resulting in serious economic losses in the major production area of the Chilean poultry industry was reported. These losses were associated with respiratory problems, increase of condemnations, drops in egg production and nephritis in breeders, laying hens and broilers due to infections with(More)
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