BACTERIAL GENERA 



319 



into short, thick rods. Anaerobic or facultative. Non-motile. Filaments sometimes 

 granular. No aerial hyphae or conidia. Parasites or facultative parasites. 

 Type species. LeptotricJiia buccalis. 



SCHIZOMYCETES. 



Order. 

 Myxobacterialea 

 Thiobacteriales 

 Chlamydobacteriales 



Family. 



Tribe. 



Actinomycetales- 



Actinomycetacese ■ 



Mycobacteriacese- 



Eubaoteriales- 



"Nitrobacteriaceae- 



'Nitrobactereae- 



Azotobactereae- 



Pseudomonadaceae- 

 Spirillaceae 



Coccaceae- 



'Neissereae- 



Streptococceae- 



Micrococceae- 



Bacteriaceai- 



Chromobactereae- 



Zopfeae- 



Bactereae- 



Lactobacilleae- 

 Pasteurelleae — 

 Haemophilese- 



Bacillaceae- 



■Actinobacillus 

 Leptotrichia 

 ActinomyceB 

 Erysipelothrix 



'Mycobacterium 

 Corynebacterium 

 Fusiformis 



_PfeiffereIla 

 Hydrogenomonas 

 Methanomonas 

 Carboxydomonas 

 Acetobacter 

 Nitrcsomonas 



Nitrobacter 



Azotobacter 



Rhizobium 



— Pseudomonas 

 I Vibrio 



|_Spirillum 

 — Neisseria 

 Leuconostoc 

 Streptococcus 



Staphylococcus 



Micrococcus 



Sarcina 



Rhodococcus 



— Chromobacterium 



— Achromobacterium 



— Zopfius 



"Proteus 

 Bacterium 

 Salmonella 



Shigella 



— Lactobacillus 



— Pasteurella 



—Haemophilus 



— Brucella 



I Bacillus 



I Clostridium 



i 



Fig. 47. 



Actinomyces. — Organisms growing in the form of a much-branched myceUum, which 

 may break up into segments or produce " spores." Aerial mycelium often formed under 

 suitable conditions. Mainly aerobic, but may be microaerophUic or even anaerobic. 

 Usually saprophytic, but some species are parasitic on plants or animals, and may give 

 rise to disease. In animal body organisms are frequently arranged in colonies composed 

 of radiating threads with clubbed ends. Non-motile. Some species are acid-fast. 



Type species. Actinomyces hovis Harz. 



Erysipelothrix. — Rod-shaped organisms with a tendency to the formation of 

 long filaments, which may show branching. The filaments may also thicken and show 



