Streptococcus pseudopneumoniae
| Streptococcus pseudopneumoniae | |
|---|---|
| Scientific classification | |
| Domain: | Bacteria |
| Phylum: | Firmicutes |
| Class: | Bacilli |
| Order: | Lactobacillales |
| Family: | Streptococcaceae |
| Genus: | Streptococcus |
| Species: | S. pseudopneumoniae |
| Binomial name | |
| Streptococcus pseudopneumoniae Arbique et al. 2004 | |
Streptococcus pseudopneumoniae is a gram-positive coccus that may cause pneumonia in humans.[1][2] It was first described in 2004.[1] The organism is often mistaken for S. pneumoniae[1] and its clinical importance is as yet uncertain. It seems likely that most cases of S. pseudopneumoniae pneumonia are misdiagnosed as S. pneumoniae.[2]
The bacterium has a number of features that allows it to be distinguished from S. pneumoniae:[2]
- There is no pneumococcal capsule (and is therefore not typable).[2]
- It is not soluble in bile.[2]
- It is sensitive to optochin when incubated in ambient air, but appears resistant or to have indeterminate susceptibility when incubated in 5% carbon dioxide.[2]
- Commercial DNA probe hybridization tests (e.g., AccuProbe Streptococcus pneumoniae culture identification test; Gen-Probe, San Diego, CA) are falsely positive.[2]
Penicillin is the treatment of choice.[2] Most reported isolates are resistant to erythromycin and to tetracycline.
References
- 1 2 3 Arbique JC, Poyart C, Trieu-Cuot P, et al. (2004). "Accuracy of phenotypic and genotypic testing for identification of Streptococcus pneumoniae and description of Streptococcus pseudopneumoniae sp. nov.". J Clin Microbiol 42 (10): 4686–4696. doi:10.1128/JCM.42.10.4686-4696.2004.
- 1 2 3 4 5 6 7 8 Keith ER, Podmore RG, Anderson TP, Murdoch DR (2006). "Characteristics of Streptococcus pseudopneumoniae isolated from purulent sputum samples". J Clin Microbiol 44 (3): 923–927. doi:10.1128/JCM.44.3.923-927.2006.
Further reading
- Hideaki, Kawakami; Yuko, Nakane; Hiroko, Inuzuka; Tominori, Fukagawa; Toshihiro, Muto; Kiyofumi, Mochizuki; Kiyofumi, Okhusu; Hiroyuki, Suematsu; Yuka, Yamagishi; Hiroshige, Mikamo (2014). "Late-onset bleb-related endophthalmitis caused by Streptococcus pseudopneumoniae". International Ophthalmology 34 (3): 643–646. doi:10.1007/s10792-013-9835-2.
- Shahinas, Dea; Thornton, Christina S.; Tamber, Gurdip Singh; Arya, Gitanjali; Wong, Andrew; Jamieson, Frances B.; Ma, Jennifer H.; Alexander, David C.; Low, Donald E.; Pillai, Dylan R. (2013). "Comparative Genomic Analyses of Streptococcus pseudopneumoniae Provide Insight into Virulence and Commensalism Dynamics". PLoS ONE 8 (6): e65670. doi:10.1371/journal.pone.0065670.
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