Propagation of Chandipura virus in chick embryos

Area of Science:

• Virology
• Infectious Diseases
• Arbovirology

Background:

• Chandipura virus (CHPV) is an emerging arbovirus responsible for significant human morbidity and mortality, particularly encephalitis in children.
• Current methods for CHPV isolation and cultivation rely on laboratory animals or cell cultures, which can be expensive and complex.
• Identifying alternative, cost-effective, and efficient host systems for CHPV is crucial for research and diagnostics.

Purpose of the Study:

• To evaluate the susceptibility of 10-day-old chick embryos to Chandipura virus (CHPV).
• To determine the replication efficiency and viral titers of CHPV isolates in chick embryos.
• To assess the potential of chick embryos as an alternative host system for CHPV cultivation and isolation.

Main Methods:

• Three Indian Chandipura virus (CHPV) isolates were inoculated into the allantoic cavity of 10-day-old chick embryos.
• Virus replication and titers were assessed using the 50% egg infectious dose (EID50) method.
• Comparative analysis with existing laboratory animal and cell culture systems was considered.

Main Results:

• All three CHPV isolates successfully replicated in the inoculated chick embryos.
• High viral titers were achieved, ranging from log 10(12) to log 10(13) EID50.
• Chick embryos demonstrated susceptibility to CHPV infection and supported significant virus growth.

Conclusions:

• Chick embryos are a suitable and efficient host system for the cultivation and isolation of Chandipura virus (CHPV).
• This system offers advantages over traditional laboratory animals and cell cultures, including lower cost and ease of use.
• The use of chick embryos for CHPV can facilitate vaccine development and the creation of diagnostic reagents.