A Review of the Emerging White Chick Hatchery Disease.
Viruses
; 13(12)2021 12 04.
Article
in En
| MEDLINE
| ID: mdl-34960704
ABSTRACT
White chick hatchery disease is an emerging disease of broiler chicks with which the virus, chicken astrovirus, has been associated. Adult birds typically show no obvious clinical signs of infection, although some broiler breeder flocks have experienced slight egg drops. Substantial decreases in hatching are experienced over a two-week period, with an increase in mid-to-late embryo deaths, chicks too weak to hatch and pale, runted chicks with high mortality. Chicken astrovirus is an enteric virus, and strains are typically transmitted horizontally within flocks via the faecal-oral route; however, dead-in-shell embryos and weak, pale hatchlings indicate vertical transmission of the strains associated with white chick hatchery disease. Hatch levels are typically restored after two weeks when seroconversion of the hens to chicken astrovirus has occurred. Currently, there are no commercial vaccines available for the virus; therefore, the only means of protection is by good levels of biosecurity. This review aims to outline the current understanding regarding white chick hatchery disease in broiler chick flocks suffering from severe early mortality and increased embryo death in countries worldwide.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Poultry Diseases
/
Chickens
/
Astroviridae Infections
/
Communicable Diseases, Emerging
/
Avastrovirus
Limits:
Animals
Language:
En
Journal:
Viruses
Year:
2021
Document type:
Article
Affiliation country:
Reino Unido