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Full-Text Articles in Medicine and Health Sciences
Efficacy Of Live Ndv Vaccine Simultaneously Vaccinated With Recombinant Hvt-Ndv Vaccine On Early Protection Against Newcastle Disease Virus Challenge, Nataya Charoenvisal, Jiroj Sasipreeyajan
Efficacy Of Live Ndv Vaccine Simultaneously Vaccinated With Recombinant Hvt-Ndv Vaccine On Early Protection Against Newcastle Disease Virus Challenge, Nataya Charoenvisal, Jiroj Sasipreeyajan
The Thai Journal of Veterinary Medicine
The objective of this study was to determine the efficacy of the recombinant herpes virus of turkey-Newcastle disease virus (rHVT-NDV) vaccine against Newcastle disease virus (NDV) challenged in 14 days old broiler chickens. One hundred chickens were divided into 5 groups of 20 chickens each. Group 1 chickens received live NDV vaccine via the intra-nasal route. Group 2 chickens received rHVT-NDV vaccine by subcutaneous injection. Group 3 chickens, received both live NDV and rHVT-NDV vaccine. Groups 4 and 5 chickens did not receive any vaccine and served as positive and negative control groups. At 14 days old, all the chickens …
Effect Of A Rapid Heat Treatment On Thai Qx-Like Infectious Bronchitis Virus And Evaluation Of Protection Induced By A Heat-Treated Virus, Tawatchai Pohuang, Sucheeva Junnu
Effect Of A Rapid Heat Treatment On Thai Qx-Like Infectious Bronchitis Virus And Evaluation Of Protection Induced By A Heat-Treated Virus, Tawatchai Pohuang, Sucheeva Junnu
The Thai Journal of Veterinary Medicine
The purpose of this study was to evaluate the effect of a rapid heat-treatment method on Thai QX-like infectious bronchitis virus (IBV) and the efficacy on protection from the virus after heat treatment. QX-like IBV isolate THA46 was incubated at 56 oC. The incubated virus was collected every 5 min for up to 1 h and then they were inoculated into embryonated chicken eggs. At 6 days post-inoculation, allantoic fluid was harvested from the embryonated eggs which were inoculated with virus of the longest heat-treatment time that induced lesions in the embryos. That allantoic fluid was used in a subsequent …