Carrier State Studies of Infectious Bronchitis Virus in Asymptomatic Layer in Pakistan


Authors

  • M.S. Mahmood Department of Veterinary Microbiology, Faculty of Veterinary Science, University of Agriculture, Faisalabad-38040, Pakistan
  • M. Siddique Department of Veterinary Microbiology, Faculty of Veterinary Science, University of Agriculture, Faisalabad-38040, Pakistan
  • I. Hussain Department of Veterinary Microbiology, Faculty of Veterinary Science, University of Agriculture, Faisalabad-38040, Pakistan

DOI:

https://doi.org/10.3923/ijps.2004.547.549

Abstract

Isolation of infectious bronchitis virus (IBV) was conducted in asymptomatic layer flocks with a history of IB or IB vaccination at least from 5 to 20 weeks before the day of sampling. A trypsin-induced hemagglutination (THA) assay to detect IBV in allantoic fluid of embryonated eggs was used. Detection of IBV through THA showed that group A [5 wks post-inoculation (PI)] was 100%, group B (10 wks PI) was 86%, group C (15 wks PI) was 74% and group D (20 wks PI) was 28% positive for IBV. Virus titre was found negatively correlated with the PI duration.

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Published

2004-07-15

Issue

Vol. 3 No. 8 (2004)

Section

Research Article

License

Copyright (c) 2004 Asian Network for Scientific Information

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.

How to Cite

Mahmood, M., Siddique, M., & Hussain, I. (2004). Carrier State Studies of Infectious Bronchitis Virus in Asymptomatic Layer in Pakistan. International Journal of Poultry Science, 3(8), 547–549. https://doi.org/10.3923/ijps.2004.547.549