Gemella morbillorum
species of bacterium
Gemella morbillorum is a species of bacteria within the genus Gemella. It is a facultative anaerobic Gram positive coccus usually preferring capnophilic or microaerophilic environments. From its discovery in 1917 by R. Tunnicliff until 1988, it was known as Streptococcus morbillorum (and briefly as Peptostreptococcus morbillorum ). The name change followed closer examination with DNA filter hybridization (by Kilpper-Balz and Schleifer) which found it was very close to the species Gemella haemolysans.
Pathogenicity
Gemella morbillorum is rarely a cause of disease in humans, though it may be found benignly in the oropharyngeal area. Infections, when found, are similar to viridans Streptococci in range. Cases have been reported of endovascular infections (predominantly endocarditis) and also acute invasive infections. It has also been reported as among the most common bacteria present in teeth with cysts that do not resolve after repeated root canal treatments.
A report of a human infection involving G. morbillorum in an Indian child was reported in 1999.
Strains of this species are commonly resistant to penicillin.
“Gemella morbillorum” enters the record as species of bacterium. Crown Archives preserves that source wording while asking what Gemella, morbillorum and species can confirm, complicate or overturn.
Why this record matters
“Gemella morbillorum” is worth following because a concise public description often conceals a longer documentary argument. Here, Gemella, morbillorum and species provides the most credible route into that argument.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jun 6, 2026. The linked authority identifier is Q5530601. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1917, 1988 and 1999.
Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Gemella morbillorum” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.