Aeromonas caviae

ALSO KNOWN AS: Motile Aeromonas Septicemia (MAS)

Aeromonas caviae is a Gram-negative, facultatively anaerobic, rod-shaped bacterium commonly found in aquatic environments. In fish, infections can lead to hemorrhagic septicemia, characterized by external signs such as fin rot, body ulcers, and hemorrhaging at the base of fins and vent. Internally, infected fish may exhibit organ hemorrhages and an enlarged spleen. Outbreaks are often associated with environmental stressors, including poor water quality and temperature fluctuations.

Distribution: Worldwide in freshwater and brackish environments.

Detection Methods: Bacterial culture on general media such as Tryptic Soy Agar (TSA).

Hosts: Various freshwater fish species, including catfish.

Target Tissue: Blood and internal organs.