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 ?
Rapid identification and antimicrobial susceptibility testing of Gram-positive cocci in blood cultures by direct inoculation into the BD Phoenix system.
An antimicrobial resistance surveillance of gram-positive cocci isolated from 12 teaching hospitals in China in 2009.
An additional gram-positive rod and gram-positive cocci (oehemolytic) were identified but could not be further speciated.
The Bruker Biotyper was also validated for identification of Corynebacterium species, generally perceived as a more challenging group of organisms to identify to the species level compared to common gram-negative bacilli and gram-positive cocci.
In a previous work performed between 2009-2011, our group surveyed 155 students and obtained a total of 455 gram-positive cocci (49.
Within 24 hours, blood cultures identified gram-positive cocci which were preliminarily reported as alpha Streptococci spp.
Evaluation of several commercial biochemical and immunologic methods for rapid identification of gram-positive cocci directly from blood cultures.
Nearly all microorganisms can cause infective endocarditis especially gram-positive cocci and the so-called HACEK microorganisms (1).
The post mortem recorded cause of death as being toxic shock due to gram-positive cocci (bacterial) infection.
Among the most prevalent of these infections are those caused by airborne Gram-positive cocci (e.
4 Providencia sturtii 1 Salmonella typhimurium 5 Salmonella barielly 1 Corynebacterium aquaticum 3 Unidentified Gram-negative 7 Gram-positive cocci (n=309) Staphylococcus aureus 201 Coagulase-negative staphylococci 65 Enterococcus faecalis 35 Enterococcus species 5 Streptococcus viridans 2 Streptococcus species 1 Gram-negative cocci (n=1) Moraxella catarrhalis 1 Fungi (n=21) Candida 20 Mycelial fungi 1 Table 2.
Gram-positive cocci, such as staphylococcus aureus, streptococcus pneumoniae, and enterococcus predominate as a cause of nosocomial and community-acquired infections.

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