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Marek’s disease: time to review the emerging threat in Indian poultry.

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Title Marek’s disease: time to review the emerging threat in Indian poultry.
Not Available
 
Creator TR Kannaki and Vasudevan Gowthaman
 
Subject Marek’s disease; re-emerging disease; India
 
Description Not Available
Marek’s disease (MD) is one of the re-emerging diseases in Indian
poultry. MD outbreaks are reported from different parts of the country
in spite of vaccination, causing major economic losses. Flock mortality
of 10–40% have still been observed in vaccinated flocks during outbreaks, although MD is considered to be well controlled with vaccination. Almost 100% of the commercial poultry flocks are vaccinated in
the hatchery. Bivalent (HVT+SB1 or HVT+301B/1) or monovalent (HVT)
vaccines are used in India. In spite of intensive vaccination, outbreaks
are still reported from different parts of the world including India. MD
virus (MDV) Indian field isolates from different outbreaks during the
last decade are categorised into virulent (vMDV) and very virulent
(vvMDV) pathotypes, based on different serotype 1 specific gene
sequencing and in vivo pathotyping. The emergence of virulence in
MDV is attributed to compromised bio-security, concurrent immunosuppressive diseases and vaccination failure. MD outbreaks in vaccinated Indian poultry flocks cause annual losses of approximately
40 million Indian rupees. Country-wide surveillance and reporting of
MD outbreaks and further characterisation of the Indian field isolate
should be taken as a priority. Reviewing current vaccination strategy
and examining the need for the introduction of more effective vaccines that give better protection against more virulent strains should
be considered with equal importance along with improved biosecurity measures, management practices and more effective control
of immunosuppressive diseases.
Not Available
 
Date 2021-03-26T09:13:35Z
2021-03-26T09:13:35Z
2020-03-19
 
Type Review Paper
 
Identifier T. R. Kannaki & Gowthaman Vasudevan (2020): Marek’s disease: time to review the emerging threat in Indian poultry, World's Poultry Science Journal, DOI: 10.1080/00439339.2020.1729674
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/46310
 
Language English
 
Relation Not Available;
 
Publisher Taylor and Francis