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- Thin, branching (filamentous or beaded) Gram-positive bacillus [Fig 1].
- Microaerophilic, grow best anaerobically.
- VERY fastidious, often does not grow in culture.
- Agents: A. israelii, A. naeslundii, A. odontolyticus, A. viscosus, A. meyer and Propionibacterium propionicum and A. gereneseriae.
- Virtually all cases are mixed infections with other bacteria including Eikenella corrodens, Bacteroides spp, S. aureus, Streptococcus spp., Aggregatibacter actinomycetemcomitans, and/or Fusobacterium sp.
- Normal flora of mouth, gut, genital tract.
- Diagnosis is often made by histopathology -- not by culture, even when suspected.
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Last updated: December 6, 2018
TY - ELEC
T1 - Actinomyces
ID - 540005
A1 - Bartlett,John,M.D.
AU - Fabre,Valeria,M.D.
Y1 - 2018/12/06/
BT - Johns Hopkins ABX Guide
UR - https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540005/all/Actinomyces
PB - The Johns Hopkins University
DB - Pediatrics Central
DP - Unbound Medicine