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chapter 1 Microbiology 9<br />

Bacilli<br />

Anaerobic<br />

Aerobic<br />

Lactobacillus<br />

Propionibacterium<br />

Actinomyces<br />

Clostridium<br />

Corynebacterium<br />

Listeria<br />

Lactobacillus<br />

Gardnerella<br />

Bacillus<br />

Pairs/Chains<br />

Catalase –<br />

α-hemolysis<br />

β -hemolysis<br />

Nonhemolytic<br />

Streptococcus<br />

pneumoniae<br />

Viridans<br />

streptococci<br />

Streptococcus<br />

pyogenes (Grp A)<br />

Streptococcus<br />

agalactiae (Grp B)<br />

Enterococcus<br />

faecium<br />

Enterococcus<br />

faecalis<br />

blood cultures, Gram-positive bacilli often represent common skin<br />

contaminants (such as Propionibacterium, Corynebacterium, and<br />

Bacillus species). Detection of Gram-positive bacilli from necrotizing<br />

wound infections suggests clostridial infection, whereas the finding<br />

of Gram-positive bacilli in CSF cultures raises the concern for<br />

Listeria.

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