A Survey of Cultured Penaeid Shrimp in Taiwan for Viral and Other Important Diseases

D. V. Lightner, Ronald Hedrick, J. L. Fryer, S. N. Chen, G. H. Kou, I. C. Liao

Research output: Contribution to journalArticle

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Abstract

A survey of disease problems adversely affecting cultured shrimp at farms in Southern Taiwan was conducted in March of 1986. Farms selected for inclusion in the survey were experiencing a variety disease problems in their shrimp stocks, including mortality, poor growth, and reduced food conversion efficiency. Some apparently healthy cultured penaeid stocks were also sampled and examined for signs of subclinical disease. Most of the eight facilities surveyed cultured Penaeus monodon exclusively, although two also contained other species (P. penicillatus, P. vannamei, and P. semisulcatus). These were also sampled and examined. Important virus pathogens found during the survey included the P. monodon-type baculovirus (MBV) found in both P. monodon and P. semisulcatus, and infectious hypodermal and hematopoietic necrosis (IHHN) virus disease in P. vannamei. MBV was the most prevalent major pathogen encountered in the survey, and it was found in samples of P. monodon from seven of the eight locations surveyed and in the single sample of P. semisulcatus. These findings indicate that MBV is a common infectious agent in cultured stocks of these species in Taiwan. The disease hemocytic enteritis (HE) was also commonly observed in shrimp from five of the eight locations surveyed. This may indicate that the disease, which may be caused by an enteric toxin produced by certain types of blue-green algae, is an important disease of cultured shrimp in Taiwan. Also found in the study were two idiopathic syndromes which often, but not always, occurred together in the same shrimp. The first of these syndromes was a generalized diffuse inflammatory disease (II), which was found in several populations of P. monodon and in two stocks of P. penicillatus. The other idiopathic condition, often was observed in shrimp with II, was characterized by hypertrophy of Oka's lymphoid organ, and disassociation and metastasis of spherical clumps of cells derived from the hypertrophied organ. A number of apparently ubiquitous penaeid epicommensals were observed on the gills, appendages, and general body surface of many shrimp sampled in the survey, and some were associated with disease and mortality.

Original languageEnglish (US)
Pages (from-to)127-140
Number of pages14
JournalFish Pathology
Volume22
Issue number3
DOIs
StatePublished - Jan 1 1987

Fingerprint

Penaeidae
Taiwan
Penaeus monodon
shrimp
Baculoviridae
Monodon
Fenneropenaeus penicillatus
pathogens
Penaeus semisulcatus
disease surveys
Infectious hematopoietic necrosis virus
virus
farms
pathogen
food conversion
farm
Litopenaeus vannamei
enteritis
mortality
appendages

ASJC Scopus subject areas

  • Aquatic Science
  • Animal Science and Zoology

Cite this

Lightner, D. V., Hedrick, R., Fryer, J. L., Chen, S. N., Kou, G. H., & Liao, I. C. (1987). A Survey of Cultured Penaeid Shrimp in Taiwan for Viral and Other Important Diseases. Fish Pathology, 22(3), 127-140. https://doi.org/10.3147/jsfp.22.127

A Survey of Cultured Penaeid Shrimp in Taiwan for Viral and Other Important Diseases. / Lightner, D. V.; Hedrick, Ronald; Fryer, J. L.; Chen, S. N.; Kou, G. H.; Liao, I. C.

In: Fish Pathology, Vol. 22, No. 3, 01.01.1987, p. 127-140.

Research output: Contribution to journalArticle

Lightner, D. V. ; Hedrick, Ronald ; Fryer, J. L. ; Chen, S. N. ; Kou, G. H. ; Liao, I. C. / A Survey of Cultured Penaeid Shrimp in Taiwan for Viral and Other Important Diseases. In: Fish Pathology. 1987 ; Vol. 22, No. 3. pp. 127-140.
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