| Lutzomyia intermedius | One of a group of sandfly species that are vectors of Leishmania braziliensis, the agent of espundia. (05 Mar 2000) |
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| Streptococcus | <bacteria, organism> A genus of bacteria that are gram-positive cocci, often occurring in chains of varying length. Some pathogenic species produce exotoxins. In man, streptococcal species are responsible for numerous infections such as scarlet fever, tonsillitis, erysipelas (skin infection), endocarditis, rheumatic fever, glomerulonephritis, impetigo, pneumonia, meningitis, pharyngitis, lymphadenitis and wound infections. Streptococcus pneumoniae is the main culprit in lobar and bronchopneumonia. Streptococci have anti-phagocytic components (hyaluronic acid rich capsule and M protein) and release various toxins streptolysins O and s, erythrogenic toxin) and enzymes streptokinase, streptodornase, hyaluronidase and proteinase. Haemolytic streptococci (viridans streptococci) produce limited haemolysis on blood agar, include Streptococcus mutans, Streptococcus salivarius and Streptococcus pneumoniae. Beta haemolytic streptococci, of which Streptococcus pyogenes is the only species, though there are many serotypes, produce a broad zone of almost complete haemolysis on blood agar as a result of streptolysin O and S release. Alpha streptococci are nonhaemolytic (e.g. Streptococcus faecalis). (30 Sep 1997) |
| Streptococcus acidominimus | A species found in the bovine vagina and on the skin of calves. (05 Mar 2000) |
| streptococcus agalactiae | A bacterium which causes mastitis in cattle and occasionally in man. (12 Dec 1998) |
| Streptococcus anginosus | A species found in the human throat, sinuses, abscesses, vagina, skin, and faeces; this organism has been associated with glomerular nephritis and various types of mild respiratory diseases. (05 Mar 2000) |
| streptococcus bovis | A species of gram-positive, coccoid bacteria commonly found in the alimentary tract of cows, sheep, and other ruminants. It occasionally is encountered in cases of human endocarditis. This species is nonhemolytic. (12 Dec 1998) |
| Streptococcus constellatus | A species found in tonsils, purulent pleurisy, appendix, the nose, throat, and gums, and infrequently on the skin and in the vagina. (05 Mar 2000) |
| Streptococcus durans | A species found in dried milk powder and in the intestines of humans and other animals. (05 Mar 2000) |
| Streptococcus dysgalactiae | A species causing acute mastitis in cattle. (05 Mar 2000) |
| streptococcus equi | A species of gram-positive, coccoid bacteria isolated from abscesses in submaxillary glands and mucopurulent discharges of the upper respiratory tract of horses. This organism belongs to group c streptococci with regards to antigen response and is known to cause strangles. The subspecies s. Zooepidemicus is also considered a pathogen of horses. (12 Dec 1998) |
| Streptococcus equinus | A species that is the predominant organism in the intestines of horses. (05 Mar 2000) |
| Streptococcus equi zooepidemicus | A species causing mastitis in cattle. (05 Mar 2000) |
| streptococcus erythrogenic toxin | A culture filtrate of lysogenised group A strains of beta-haemolytic streptococci, erythrogenic when inoculated into the skin of susceptible persons, and neutralised by antibodies that appear during scarlet fever convalescence; three immunological types (A, B, and C) are recognised. Synonym: Dick test toxin, erythrogenic toxin, scarlet fever erythrogenic toxin. (05 Mar 2000) |
| Streptococcus faecalis | A species found in human faeces and in the intestines of many warm-blooded animals; occasionally found in urinary infections and in blood and heart lesions in cases of subacute endocarditis; associated with European foul brood of bees and with mild outbreaks of food poisoning. (05 Mar 2000) |
| Streptococcus faecalis metalloproteinase | <enzyme> Bacterial metalloproteinase from streptococcus faecalis Registry number: EC 3.4.24.- Synonym: streptococcus faecalis metalloendopeptidase, metalloproteinase (streptococcus faecalis), sf-metalloproteinase (26 Jun 1999) |