Lancefield group F and related streptococci

Lung abscesses in 2 patients with Lancefield group F streptococci (Streptococcus milleri group).

Lung abscess presents as a circumscribed accumulation of pus in the lungs, which is more common in patients predisposed to aspiration, immunosuppressed patients, and patients with chronic lung disease, malignancies, or diabetes mellitus.1 Lung abscess is also associated with dental caries, alcohol abuse, and uncontrolled epilepsy. Many reports associate lung abscess with the presence of anaerob...

Streptococcus sinensis may react with Lancefield group F antiserum.

Lancefield group F streptococci have been found almost exclusively as members of the 'Streptococcus milleri' group, although they have been reported very occasionally in some other streptococcal species. Among 302 patients with bacteraemia caused by viridans streptococci over a 6-year period, three cases were caused by Streptococcus sinensis (type strain HKU4T, HKU5 and HKU6). All three patient...

XV Lancefield Symposium on Streptococci and Streptococcal Diseases.

Clinical application of immunofluorescence. 3. Identification of Lancefield group B streptococci.

The identification of Lancefield group B streptococci with immunofluorescence was studied after significant differences between the precipitin and immunofluorescent results were noted. It was found that strains of group B streptococci, unlike groups A, C, and G streptococci, do not reliably react with a fluorescein isothiocyanate-labeled conjugate that contains antibodies mainly against C polys...

Lancefield group C streptococcal endocarditis.