| 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.
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
arylamidase, alpha-galactosidase,
beta-galactosidase, beta-glucuronidase, arginine
dihydrolase, acidification of: arabinose, ribose,
mannitol, sorbitol, inulin, and glycogen were
negative.
Alkaline phosphatase, leucine aminopeptidase,
acidification of lactose, trehalose, raffinose, and
starch were positive.
Voges-Proskauer test, hyppurate hydrolysis,
esculin hydrolysis (beta-glucosidase), pyrolidonyl
arylamidase, alpha-galactosidase,
beta-galactosidase, beta-glucuronidase, arginine
dihydrolase, acidification of: arabinose, ribose,
mannitol, sorbitol, inulin, and glycogen were
negative.
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
and Sulphamethoxazole+Trimethoprim.
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
and Sulphamethoxazole+Trimethoprim.
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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.
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.
| Streptococcus pyogenes |
| Lung petechiae |
