Parasitology, Harold W. Manter Laboratory of
Date of this Version
6-1990
Citation
Aquaculture 87:3–4 (June 1990), pp. 237–242.
doi: 10.1016/0044-8486(90)90061-Q
Abstract
Age of Penaeus vannamei influences infections with Baculovirus penaei in different ways. The virus has less effect on host survival in the older of seven tested age-groups of shrimp experimentally administered virus; no virus-induced mortality occurred in postlarvae older than 63 days. Prevalence of newly acquired infections decreases as age increases, sometimes to zero. Prepatency periods appear to increase by a few days in infections in most successively older tested age-groups. Actual and relative numbers of affected hepatopancreatic cells decrease from 75 or 80% typically seen in postlarvae infected when 3 days old to ≤ 5% typically seen in infected individuals exposed when they were 63 to 157 days old; infections become undetectable in individuals exposed when they were 325 and 454 days old.
Comments
Copyright © 1990 Elsevier Science Publishers B.V.
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