coccus

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coccus

 [kok´us] (pl. coc´ci) (L.)
a spherical bacterium, usually slightly less than 1 μ in diameter, belonging to the Micrococcaceae family. It is one of the three basic forms of bacteria, the other two being bacillus (rod-shaped) and spirillum (spiral-shaped). A pathogenic coccus can almost always be classified as either a staphylococcus (occurring in clusters), or a streptococcus (occurring in short or long chains). Both staphylococci and streptococci are gram-positive and do not form spores.

The staphylococci are responsible for many serious infections, especially Staphylococcus aureus, which is the causative agent in boils, abscesses, osteomyelitis, and a large variety of other infections. Staphylococci have received much attention in recent years because of the ability of most strains to develop a resistance to antibiotics.

The most dangerous streptococci are those of the beta-hemolytic type. Various species of streptococci cause sore throat, scarlet fever, mastoiditis, and septicemia.
Cocci.

coc·cus

, pl.

coc·ci

(kok'ŭs, kok'sī), Avoid mispronouncing the plural form kok'ī.
1. A bacterium of round, spheroid, or ovoid form.
2. Synonym(s): cochineal
[G. kokkos, berry]

coccus

/coc·cus/ (kok´us) pl. coc´ci   [L.] a spherical bacterium, less than 1 μm in diameter.coc´cal

coccus

(kŏk′əs)
n. pl. cocci (kŏk′sī, kŏk′ī)
A bacterium having a spherical or spheroidal shape.

coc′cal (kŏk′əl) adj.

coccus

[kok′əs] pl. cocci
Etymology: Gk, kokkos, berry
a bacterium that is round, spheric, or oval, such as gonococcus, pneumococcus, staphylococcus, and streptococcus. coccal, adj.

coc·cus

, pl. cocci (kokŭs, -sī)
1. A bacterium of round, spheroid, or ovoid form.
2. Synonym(s): cochineal.
[G. kokkos, berry]

coccus

A common type of spherical or spheroidal bacterium. Cocci connected in line are called STREPTOCOCCI; those in bunches are called STAPHYLOCOCCI.

coccus

a bacterium having a spherical or globular form.

coc·cus

, pl. cocci (kokŭs, -sī)
A bacterium of round, spheroid, or ovoid form.
[G. kokkos, berry]

coccus

pl. cocci [L.] a spherical bacterium, usually slightly less than 1 μm in diameter, belonging to the Micrococcaceae family. It is one of the three basic forms of bacteria, the other two being bacillus (rod-shaped) and spirillum (spiral-shaped). Almost all of the pathogenic cocci are either staphylococci, which occur in clusters, or streptococci, which occur in short or long chains. Both staphylococci and streptococci are gram-positive and do not form spores.
References in periodicals archive ?
An increased incidence of gram-positive cocci that are resistant to vancomycin is expected to increase in this circumstance.
luteus was used as a surrogate for Gram-positive cocci, because M.
Two families of gram-positive cocci which are facultative anaerobes are common inhabitants of the vertebrate gut (Smith 1965; Drasar & Hill 1974).
20) A Lactobacillus-based probiotic of undisclosed derivation given to 3 species of macaws--spix (Cyanopsitta spixii), Lear's (Anodorhynchus leari), and hyacinth (Anodorhynchus hyacinthinus)--caused a shift from predominantly gram-positive cocci flora back to predominantly gram-positive rod flora.
Gram-positive cocci in pairs and chains (GPCPC) from positive blood cultures, were included in the study.
Gram stain would reveal an abundance of inflammatory cells, many Gram-positive cocci, and no or rare lactobacilli in a middle-age or post-menopausal vaginal specimen.
For instance, an increased creatinine value may be considered "critical" only if it is a new finding and the patient is not admitted to the dialysis unit; a late-night blood culture demonstrating rare gram-positive cocci in clusters may be called immediately for inpatients but not until the following morning for outpatients; or Dr.
What two main bacterial groups of gram-positive cocci does the catalase test distinguish between?
TABLE 1 Bacteriostatic activity of chlorhexidine on some bacteria Organism Mean MIC Range (mg/l) (mg/l) Gram-positive cocci Staphylococcus aureus 1.
The commonest organisms involved are Gram-positive cocci, notably Staphylococcus aureus.

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