Isolation of a zoonotic pathogen Aeromonas hydrophila from freshwater stingray (Potamotrygon motoro) kept in a Korean aquarium with ricefish (Oryzias latipes)

Abstract

In the present study, Aeromonas (A.) hydrophila was isolated from a captive-bred adult freshwater stingray (Potamotrygon motoro) reared at a commercial aquarium in Korea. The stingray had bites on its fins, hemorrhages on the ventral part, and congested internal organs. A bacterium was isolated from kidney and subsequently identified as A. hydrophila. Based on phylogenetic analysis results, the isolate in the present study (SNUAh-LA1) was most closely related to A. hydrophila AH10 (China) and A. hydrophila AKR1 (Korea). It is most likely that the pathogen infection resulted from Potamotrygon motoro cohabiting with ricefish (Oryzias latipes).

Phenotypic Characterization, Genetic Analysis and Antibiotic Sensitivity of Aeromonas Hydrophila Isolates Causing Abdominal Dropsy in Labeo Rohita Collected From Punjab, Pakistan

“…MT193203) which is more recently discovered strain from Tamilnadu, India. The results of present study confirm that A. hydrophila strains are geographically more related to those in India 48,49 , Bangladesh 33,50 , China 51,52 and South Korea 17 .…”

“…Shahzad et al 22 from Pakistan and Kusdarwati et al 53 from Indonesia obtained similar results on the chosen antibiotics. Resistance of A. hydrophila isolates against amoxicillin and penicillin has previously been reported from fish affected with bacterial diseases in India 54 , United Arab Emirates 55 , Bangladesh 56 , Egypt 57 and South Korea 17 . Subsequently from this study, fish farmers will be benefited for controlling Abdominal dropsy and other infectious diseases caused by A. hydrophila by the administration of specific therapeutants.…”

“…In a variety of freshwater species, the existence and pathogenicity of A. hydrophila has previously been reported in different fish species particularly Carassius auratus 13 , Cyprinus carpio 13 , Anabas testudineus 14 , Clarias gariepinus 15 , Oncorhynchus mykiss 16 and Potamotrygon motoro 17 . It has been recently reported that A. hydrophila is the key bacterial pathogen that causes diseases in freshwater fish species 18 .…”