|Streptococcus pyogenes pneumonia in rabbits
- short communication -
DVM Costin Stoica
A "German giant" rabbits breeder reported occasionally deads without significant clinical
signs. He brougt a dead female for investigations.
Necropsy revealed fibrinous and haemorrhagic pneumonia with 2-3 mm, haemorrhagic
spots on the left lung and large fibrin deposits on the right lung.
API 20 Strep biochemical tests:
Alkaline phosphatase, leucine aminopeptidase,
acidification of lactose, trehalose, raffinose, and
starch were positive.
Voges-Proskauer test, hyppurate hydrolysis,
esculin hydrolysis (beta-glucosidase), pyrolidonyl
beta-galactosidase, beta-glucuronidase, arginine
dihydrolase, acidification of: arabinose, ribose,
mannitol, sorbitol, inulin, and glycogen were
ABIS 9 online software result was Streptococcus pyogenes 83% (with a question mark on the negative pyrolidonyl
arylamidase, arginine dihydrolase and acidification of raffinose).
Streptoccus strain was sensible to Penicillin, Phosphomycin, Doxycycline, Lincomycin+Spectinomycin,
Oxitetracycline, Florfenicol, Amoxicillin, intermediate to Erithromycin and resistant to Gentamycin, Colistin sulphate
(c) Costin Stoica
A Streptococcus pyogenes strain has been isolated from the right lung. Bacteriological
exam from liver, heart and bone marrow was negative.
Morphological and biochemical properties of the strain:
Gram-positive cocci, grouped in long chains.
After 24 h incubation at 37 ºC, on 5% sheep blood agar colonies were pinpoint, <1 mm in
diameter, beta-hemolytic. No growth on MacConkey agar. Low turbidity and thin deposit in
nutrient broth. Aerobic and anaerobic growth. Catalase negative. Oxidase positive.