S. Boonyaratpalin et al., NON-OCCLUDED BACULO-LIKE VIRUS, THE CAUSATIVE AGENT OF YELLOW HEAD DISEASE IN THE BLACK TIGER SHRIMP (PENAEUS-MONODON), Gyobyo kenkyu, 28(3), 1993, pp. 103-109
A new non-occluded baculo-like virus was detected from black tiger shr
imp (Penaeus monodon) with yellow head disease in the southern part of
Thailand. Virus particles observed in necrotic tissues of gills and l
ymphoid organ were bacilliform in shape, ranging from 150-200nm in len
gth and 40-50nm in diameter, and were enveloped singly by a trilaminar
unit membrane. From the experimental infection trials, it was assumed
that this virus was the most virulent among the viruses which have be
en known in the black tiger shrimp, to date. Pathogenicity and some ch
aracters of the virus as well as pathological changes caused by this v
irus were described.