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Any of various extremely small bacteria of the genus Mycoplasma that lack cell walls, are usually nonmotile, and are often pathogenic or parasitic in mammals.

[New Latin genus name : myco- + plasma.]

my′co·plas′mal adj.


(Microbiology) any prokaryotic microorganism of the genus Mycoplasma, some species of which cause disease (mycoplasmosis) in animals and humans


(ˌmaɪ koʊˈplæz mə)

n., pl. -mas.
any of a group of very small microorganisms without cell walls, of the prokaryote class Mollicutes, that are a common cause of pneumonia and urinary tract infections.
[1955–60; < New Latin (1929), a genus; see myco-, plasma]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.mycoplasma - any of a group of small parasitic bacteria that lack cell walls and can survive without oxygen; can cause pneumonia and urinary tract infection
eubacteria, eubacterium, true bacteria - a large group of bacteria having rigid cell walls; motile types have flagella
genus Mycoplasma - type and sole genus of the family Mycoplasmataceae
pleuropneumonialike organism, PPLO - a mycoplasma resistant to antibiotics that causes a kind of pneumonia in humans
References in periodicals archive ?
Tubal and cervical cultures in acute salpingitis with special reference to Mycoplasma hominis and T-strain mycoplasmas.
Female genital-tract HIV load correlates inversely with Lactobacillus species but positively with bacterial vaginosis and Mycoplasma hominis.
This infection occurs when the normal Lactobacillus bacteria in the vagina are disrupted and subsequently replaced by predominantly anerobic bacteria such as Gardnerella vaginalis, Mycoplasma hominis, Prevotella and Peptostreptococcus.
Ureaplasma urealytycum and Mycoplasma hominis have also been implicated in vaginal infections leading to vaginal discharge (Onvural et al.
Urethral swabs and urine samples obtained from patients were subjected to semi-quantitative culture for Mycoplasma hominis and Ureaplasama urealyticum, whereas M.
Although Ureaplasma urealyticum and Mycoplasma hominis are found in 80 percent of vaginal and cervical fluids, infants are not generally screened for these bacterial infections.
Hydrogen peroxide-producing lactobacilli were associated with a significant decrease in cervicovaginal lavage HIV RNA concentrations, and Trichomonas vaginalis, Prevotella bivia, Mycoplasma hominis, and other anaerobes were associated with increases in cervicovaginal lavage HIV RNA concentrations.
Hydrogen peroxide-producing lactobacilli, for example, were associated with a significant decrease in cervicovaginal lavage (CVL) HIV RNA concentrations, and Trichomonas vaginalis, Prevotella bivia, and Mycoplasma hominis.
In contrast, Ureaplasma urealyticum, Mycoplasma hominis, and Streptococci, although transmissible through artificial insemination procedures, exist in many healthy, sexually active adults, and their pathogenicity to the recipient of reproductive cells or tissue is of questionable clinical significance.

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