Enterocytozoon hepatopenaei (EHP)

Enterocytozoon hepatopenaei is a microsporidian first discovered in Penaeus monodon in Thailand in 2004. EHP affects both P. monodon and P. vannamei. Although EHP does not cause mortality, it will retard the growth. Loose shell disease is associated with EHP infection, cause huge economical problem. From 2009 onwards, Asian farmers start to monitor EHP.

Clinical Signs : No clinical sign but retarded growth

Mode of transmission : Horizontal transferMortality : Slow growth