Select bacterium Acinetobacter calcoaceticus Actinobacillus equuli Actinobacillus lignieresii Actinobacillus pleuropneumoniae Aeromonas hydrophila Aeromonas salmonicida Arcanobacterium pyogenes Bacillus cereus Bacillus subtilis Bordetella bronchiseptica Branhamella ovis Campylobacter Citrobacter Clostridium perfringens Clostridium sporogenes Corynebacterium pseudotuberculosis Corynebacterium renale Dermatophilus congolensis Enterococcus faecalis Erysipelothrix rhusiopathiae Escherichia coli Fusobacterium necrophorum A Fusobacterium necrophorum B Klebsiella pneumoniae Listeria monocytogenes Listeria seeligeri Mannheimia haemolytica Moraxella bovis Pasteurella multocida Peptostreptococcus indolicus Proteus mirabilis Pseudomonas aeruginosa Rhodococcus equi Salmonella enterica Shigella sonnei Staphylococcus aureus Staphylococcus hyicus Staphylococcus pseudintermedius Streptococcus agalactiae Streptococcus dysgalactiae subsp dysgalactiae Streptococcus equi subsp equi Streptococcus pneumoniae Streptococcus uberis Streptococcus zooepidemicus Streptomyces albus Vibrio anguillarum Vibrio parahaemolyticus Yersinia enterocolitica Yersinia pseudotuberculosis

Arcanobacterium pyogenes
Blood Agar plate which has been incubated with 5% carbondioxide for 24 hours. Small, grey-white, convex colonies. Previous names: Corynebacterium pyogenes, Actinomyces pyogenes. Click on the pictures below to see an enlarged version.		The same Blood Agar plate examined with transmitted light. The colonies are surrounded by a zone of beta-haemolysis.
General characteristics: Gram-negative. Catalase- and oxidase-positive. Non-motile. Attacks sugars by fermentation.
Microscopy: Gram stain