Yellow head viruses and disease
Issued Date
2022-01-01
Resource Type
Scopus ID
2-s2.0-85143333937
Journal Title
Aquaculture Pathophysiology: Volume II. Crustacean and Molluscan Diseases
Volume
2
Start Page
137
End Page
152
Rights Holder(s)
SCOPUS
Bibliographic Citation
Aquaculture Pathophysiology: Volume II. Crustacean and Molluscan Diseases Vol.2 (2022) , 137-152
Suggested Citation
Soowannayan C., Dong X. Yellow head viruses and disease. Aquaculture Pathophysiology: Volume II. Crustacean and Molluscan Diseases Vol.2 (2022) , 137-152. 152. doi:10.1016/B978-0-323-95434-1.00018-8 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/83356
Title
Yellow head viruses and disease
Author(s)
Other Contributor(s)
Abstract
Yellow head disease (YHD) is caused by yellow head virus genotype 1 (YHV-1), which is a positive-sense (+) ssRNA virus that belongs to the genus Okavirus, family Roniviridae, order Nidovirales. There are currently eight recognized genotypes. The virions are rod-shaped (bacilliform) and approximately 35–60nm×140–200nm with rounded ends. YHD was first recognized in Thailand where outbreaks of YHD caused substantial economic losses in the 1990s, but losses decreased after the widespread introduction of specific pathogen-free (SPF) seedstocks of Penaeus vannamei around 2002. YHV genotype 8 (YHV-8), recently described from China also appears to have high virulence. The infection of YHV can be transmitted vertically and horizontally. Control of YHD is focused on the use of SPF stocks in biosecure culture settings.