Larvae and early post-larvae of Penaeus monodon (Fabricius)
experimentally infected with white spot syndrome virus (WSSV) show no
significant mortality
K.
Yoganandhan, R.B. Narayanan, A.S.
Sahul Hameed-2003
Journal
of Fish Diseases, 26(7): 385
Abstract:
The
pathogenicity of white spot syndrome virus (WSSV) was tested with different
developmental stages of Penaeus monodon, i.e. nauplius, protozoeae,
mysis, early post-larvae (PL1-10), late post-larvae (PL11-20) and juveniles.
WSSV challenge was done by immersion and oral routes. No disease occurred in
the larvae and early post-larvae but they were positive for WSSV by nested
polymerase chain reaction (PCR) assay. Significant mortality was observed in
late post-larvae and juveniles and both single and nested PCR assays gave
positive results with these samples. The results demonstrated that WSSV
virulence in P. monodon increases with advancing stages of
development and that WSSV infection does not result in disease for larvae
and post-larvae younger than PL10.
(Centre for Biotechnology, Anna
University, Chennai 600 025, Tamil Nadu, India, e-mail of A.S. Sahul
Hameed: cah_sahul@hotmail.com)