Listed below are the reported aquatic animal diseases submitted by countries in the Asia-Pacific region, which covers the fourth quarter of 2023. The original and updated reports can be accessed from the QAAD page.

Finfish Diseases

• Infection with epizootic haematopoietic necrosis virus (EHN): Australia in wild adults and juveniles redfin perch (Perca fluviatilis).
• Infection with Aphanomyces invadans (EUS): Bangladesh in mrigal (Cirrhinus mrigala) and rohu (Labeo rohita); and, India in snakehead (Channa marulius).
• Infection with red seabream iridovirus (RSIV): Chinese Taipei in hybrid grouper (Epinephelus fuscoguttatus x E. lanceolatus), seabass (Lates calcarifer) and silver seabream (Rhabdosagrus sarba); and, India (reported as ISKNV) in seabass (Lates calcarifer).
• Infection with tilapia lake virus (TiLV): India in tilapia (Oreochromis niloticus), and Philippines in fingerlings, grow-out and adult tilapia (Oreochromis sp.).
• Viral encephalopathy and retinopathy (VER): Chinese Taipei in hybrid grouper and giant grouper (E. lanceolatus).
• Grouper iridoviral disease (GIV): Chinese Taipei in hybrid grouper and giant grouper (E. lanceolatus).

Molluscan Diseases

• Infection with Perkinsus olseni: India in mussel (Perna viridis) and clam (Arca sp.).

Crustacean Diseases

• Infection with white spot syndrome virus (WSSV):  Chinese Taipei in whiteleg shrimp (P. vannamei); India in P. vannamei; and, the Philippines in P. vannamei (fry, PL, grow-out culture, and adult) and wild crabs.
• Infection with infectious hypodermal and haematopoietic necrosis virus (IHHNV): Philippines in P. vannamei (PL).
• Acute hepatopancreatic necrosis disease (AHPND): The Philippines in P. vannamei (PL).
• Infection with Infectious myonecrosis virus (IMNV): India in P. vannamei.
• Hepatopancreatic microsporidiosis caused by Enterocytozoon hepatopenaei (EHP): Chinese Taipei in P. vannamei; India in P. vannamei; and, the Philippines in P. vannamei (PL and grow out culture) and P. monodon (PL).

Amphibian Diseases

• Infection with Batrachochytrium dendrobatidis: Australia in Myxophyes australis, Lymnodynastes peronii and an unknown frog species in Victoria.

Other Diseases

• Bangladesh reported Infection with Aeromonas spp. in stinging catfish (Heteropneustes fossilis), gulsha (Mystus cavasius), pangas catfish (Pangasianodon hypophthalmus), pabda (Ompok bimaculatus). India reported Infection with tilapia parvovirus in O. niloticus.

E.M. Leaño
Senior Programme Officer
Health and Biosecurity