June 23, 2020
Several Taiwanese shrimp, crayfish farms hit by DIV1 virus
A highly infectious virus has hit two shrimp farms and over 10 crayfish farms in Taiwan, CNA reported on June 18.
The development was made known publicly by local government agencies and the Council of Agriculture (COA). According to COA, the virus, called Decapod iridescent virus 1, or DIV1, poses a deadly threat to certain species of shrimp. It was first discovered in China in 2014.
Pacific white shrimp (Litopenaeus vannamei), specifically, are very vulnerable to the virus which can cause high mortality to the species, said COA Deputy Minister Huang Chin-cheng. Other species greatly affected by DIV1 include giant tiger prawn (Penaeus monodon) and giant river prawn (Macrobrachium rosenbergii).
Crayfish do not display symptoms of the disease upon infection.
The COA started inspecting all local shrimp and crayfish farms following a DIV1 outbreak in China in April, said Huang.
11 out of some 30 crayfish farms in Taiwan have been infected, Huang told CNA.
One of the infected farms is located in Hsinchu County, while two are located in the south, with one in Yunlin County and one in Kaohsiung, local government agencies reported.
So far, 1,521 kilogrammes of crayfish at affected sites were destroyed.
Two farms in eastern Yilan County that breed Pacific white shrimp have also been infected, the county's Animal and Plant Disease Control Center said. The infected areas total 1.5 hectares, which the city government has disinfected, the center said, adding that the shrimps in the farms had not yet been sold as they were not fully grown.