Actinobacillus suis-like organisms in horses.
Actinobacillus suis-like organisms have been recognized in equine specimens at the University of California Veterinary Medical Teaching Hospital since 1975. The most common source (65%) of the organism was transtracheal washings. The organism was gram-negative, produced hemolysis on blood agar, and gave a positive reaction for oxidase, urease, o-nitrophenyl-beta-D-galactopyranoside, and esculin. Carbohydrate reactions were variable, consisting of 4 main patterns. Actinobacillus suis-like organisms were (90%) sensitive to therapeutic concentrations of amikacin, cephalothin, chloramphenicol, gentamicin, kanamycin, tetracycline, and trimethoprim-sulfamethoxazole. Other aerobic and anaerobic bacteria were recovered frequently with the organism.
D000188:Actinobacillus / Q000302:isolation & purification; D000189:Actinobacillus Infections / Q000382:microbiology / Q000662:veterinary*; D000818:Animals; D005260:Female; D006734:Horse Diseases / Q000382:microbiology*; D006736:Horses; D008297:Male