Actinomycetes: Difference between revisions
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==Background== |
==Background== |
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*Filamentous, mostly branching [[Stain::Gram-positive]] [[ |
*Filamentous, mostly branching [[Stain::Gram-positive]] [[Shape::bacillus|bacilli]] |
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*The order Actinomycetales includes the aerobic actinomycetes |
*The order Actinomycetales includes the aerobic actinomycetes |
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**Actinomycetales also include [[ |
**Actinomycetales also include [[Corynebacterium]] (non-branching, non-acid-fast), [[Mycobacterium]] (non-branching, fully acid-fast), and [[Tropheryma whipplei]] |
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*Environmental organisms found in soil |
*Environmental organisms found in soil |
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*More commonly seen in fungal cultures |
*More commonly seen in fungal cultures |
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Latest revision as of 16:59, 25 January 2022
Background
- Filamentous, mostly branching Gram-positive bacilli
- The order Actinomycetales includes the aerobic actinomycetes
- Actinomycetales also include Corynebacterium (non-branching, non-acid-fast), Mycobacterium (non-branching, fully acid-fast), and Tropheryma whipplei
- Environmental organisms found in soil
- More commonly seen in fungal cultures
- Typically not acid-fast, though some are partially acid-fast
Organisms
| Genus | Infections |
|---|---|
| Partially acid-fast (cell wall contains mycolic acid) | |
| Nocardia | mycetoma, lymphocutaneous infections, skin abscesses; in immunocompromised hosts, invasive pulmonary and disseminated infections |
| Rhodococcus | pulmonary infections, bacteremia, skin and wound infections, UTIs, endophthalmitis, peritonitis, CLABSI, abscess in prostate, spleen, thyroid, kidney, or brain, osteomyelitis; associated with horses |
| Gordonia | skin infections, chronic pulmonary disease, CLABSI, wound infections, bacteremia |
| Tsukamurella | peritonitis, CLABSI, skin infection |
| Not partially acid-fast (cell wall does not contain mycolic acid) | |
| Streptomyces | commonly contaminant; inoculation skin infection including mycetoma |
| Actinomadura | inoculation skin infection including mycetoma |
| Dermatophilus | inoculation skin infection from insects or thorns |
| Nodardiopsis | |
| Oerskovia | |
