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21. Peptide methionine sulfoxide reductase (MsrA) is a virulence determinant in Mycoplasma genitalium

Author

Dhandayuthapani, S., Blaylock, M. W., Bebear, C. M., Rasmussen, W. G., and Baseman, J. B.

Subjects
Bacteriology -- Research, Peptides -- Analysis, Methionine -- Physiological aspects, Mycoplasma -- Physiological aspects, Enzymes -- Genetic aspects, Peptides -- Genetic aspects, Biological sciences
Abstract

Research has been conducted on the mycoplasma cytadherence of Mycoplasma genitalium. The identification of the new loci regulating this cytadherence has been carried out and the results indicate that msrA encodes the antioxidant repair enzyme peptide methionine sulfoxide reductase.

Published
2001

40. Epidemiologic and molecular investigations of genital mycoplasmas from women and neonates at delivery

Author

Grattard F, Soleihac B, De Barbeyrac B, Bebear C, Seffert P, and Bruno POZZETTO

Subjects
Microbiology (medical), Biovar, Mycoplasmataceae, Mycoplasma hominis, urologic and male genital diseases, medicine.disease_cause, Polymerase Chain Reaction, Microbiology, law.invention, Mycoplasma, fluids and secretions, Pregnancy, law, Prevalence, medicine, Humans, Mycoplasma Infections, Colonization, Prospective Studies, Polymerase chain reaction, Molecular Epidemiology, Labor, Obstetric, biology, Ureaplasma Infections, Infant, Newborn, bacterial infections and mycoses, biology.organism_classification, medicine.disease, Infectious Disease Transmission, Vertical, female genital diseases and pregnancy complications, Bacterial Typing Techniques, Infectious Diseases, Pediatrics, Perinatology and Child Health, Mollicutes, bacteria, Female, Ureaplasma urealyticum, Premature rupture of membranes
Abstract

The rates of colonization by Ureaplasma urealyticum and Mycoplasma hominis were evaluated in 208 women at delivery and in their neonates. Mycoplasmas were isolated from the cervicovaginal specimens of 100 mothers (48.1%) and from the gastric secretions of 40 neonates (19.2%). The prevalences of U. urealyticum and M. hominis were 47.6% and 11.0% in women and 19.2% and 1.0% in neonates, respectively. Premature rupture of membranes was significantly associated with colonization of women by U. urealyticum (P = 0.031), and colonization of their neonates by U. urealyticum (P = 0.002) and/or M. hominis (P = 0.023). Forty-four selected strains of mycoplasmas were further characterized by arbitrarily primed polymerase chain reaction. All strains of U. urealyticum belonged to the parvo biovar of the species. Arbitrarily primed polymerase chain reaction demonstrated the similarity of strains isolated from mother-neonate pairs, confirming the importance of vertical transmission of mycoplasmas at delivery.

Published
1995

42. In Vitro Activity of Trovafloxacin Compared to Those of Five Antimicrobials against Mycoplasmas Including Mycoplasma hominis and Ureaplasma urealyticum Fluoroquinolone-Resistant Isolates That Have Been Genetically Characterized

Author

Bebear, C. M., Renaudin, H., Charron, A., Gruson, D., Lefrancois, M., and Bebear, C.

Subjects
Ofloxacin, Drug Resistance, Microbial, Microbial Sensitivity Tests, biochemical phenomena, metabolism, and nutrition, bacterial infections and mycoses, urologic and male genital diseases, female genital diseases and pregnancy complications, Anti-Bacterial Agents, Erythromycin, Mycoplasma hominis, Susceptibility, Ciprofloxacin, Doxycycline, bacteria, Humans, Naphthyridines, Ureaplasma urealyticum, Fluoroquinolones
Abstract

The in vitro activity of trovafloxacin against 125 strains of Mycoplasma species and Ureaplasma urealyticum, including fluoroquinolone-susceptible and fluoroquinolone-resistant species, was compared to those of other fluoroquinolones, doxycycline, and erythromycin. The MIC at which 90% of isolates are inhibited for all fluoroquinolone-susceptible strains was 0.25 microg/ml. Whatever the associated mutations, trovafloxacin exhibited greater activity than the other fluoroquinolones tested against fluoroquinolone-resistant Mycoplasma hominis and U. urealyticum isolates.

Published
2000

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