Aeromonas hydrophila-associated septicemia in captive crocodiles (Crocodylus johnstoni and Crocodylus porosus).
Five 25-yr-old crocodiles (Crocodylus johnstoni and Crocodylus porosus) were diagnosed with Aeromonas hydrophila-associated septicemia accelerated by improper thermoregulation. At necropsy, pulmonary congestion and pleural effusion were the main lesions in the thorax. Necrotizing enteritis, intestinal hemorrhage, fibrinous serositis, hepatitis, and pancreatitis were observed in the abdominal cavities of all five crocodiles. Aeromonas hydrophila was identified in the pleural effusions and abdominal ascites of all necropsied crocodiles by using an API system 20NE. Aeromonas hydrophila infection and evaluation of virulence were confirmed by polymerase chain reaction targeting the 16S rRNA and extracellular hemolysin gene. The crocodiles in the present case were housed in an indoor facility at a private zoo that failed to optimize land and water portions of the enclosure, exposing the animals to impeded thermoregulation, and it is suggested that the pathogenesis was accelerated by the improper thermoregulation-induced stress. This is the first description of A. hydrophila pathogenicity associated with impeded thermoregulation in reptiles.
Bio-Safety Research Institute, Department of Pathology, College of Veterinary Medicine, Chonbuk National University, Jeonju City 561-756, Korea.
Yoon-Seok
YS
Roh
Heejin
H
Park
Hyun-Ung
HU
Cho
Ara
A
Cho
Mohammad Rafiqul
MR
Islam
Ho-Seong
HS
Cho
Chae Woong
CW
Lim
Bumseok
B
Kim
D016980:Aeromonas hydrophila; D000489:Alligators and Crocodiles; D000818:Animals; D000836:Animals, Zoo; D017809:Fatal Outcome; D016905:Gram-Negative Bacterial Infections / Q000382:microbiology / Q000662:veterinary*; D018805:Sepsis / Q000382:microbiology / Q000662:veterinary*