Nontypable Haemophilus influenzae (Biotype 4) as a Neonatal, Maternal, and Genital Pathogen

Wallace, Richard J.; Baker, Carol J.; Quinones, Frank J.; Hollis, D G; Weaver, Robert E.; Wiss, K

doi:10.1093/clinids/5.1.123

Cited by 174 publications

(115 citation statements)

References 55 publications

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“…Nearly half of the genital isolates were biotype IV, in contrast with only 4% of the respiratory-tract strains. This finding supports the view that biotype IV should be considered as a genital pathogen (Wallace et al, 1983), although preferential survival in the genital tract could be another explanation for this phenomenon.…”

supporting

confidence: 87%

“…Recently it has been suggested that Haemophilus influenzae biotype IV should be considered to be a genital and neonatal pathogen (Wallace et al, 1983), but other biotypes of this species have been reported to be involved in infections of the genital tract (Albritton et al, 1978;Messing et al, 1983). Although this site of infection is a rare one for H .…”

Section: Introductionmentioning

confidence: 99%

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Isolation of Haemophilus influenzae and Haemophilus parainfluenzae from genital-tract specimens with a selective culture medium

Sturm

1986

Journal of Medical Microbiology

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Summary.A series of 2027 genital tract specimens was cultured for Haemophilus species on non-selective chocolate agar and on a selective medium (Choc-VBCA). The latter gave a significantly higher isolation rate. H . injluenzae was isolated from 27 specimens and H . parainfluenzae from 81 specimens by use of the selective medium. The biotype distribution of both species was compared with that of an equal number of isolates from respiratory-tract secretions. H . influenzae biotypes I1 and IV were found to predominate in genital strains and biotypes I1 and I11 in respiratory strains. With H . parainjluenzae, biotype I1 was most frequent in both sites. Two new biotypes of H . parainfluenzae (VI and VII) are described. The significance of the use of selective media and of biotype distribution are discussed.

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supporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Isolation of Haemophilus influenzae and Haemophilus parainfluenzae from genital-tract specimens with a selective culture medium

Sturm

1986

Journal of Medical Microbiology

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“…The anatomic origins of the isolates are listed in Table 1. Some of the isolates have been described previously (Wallace et al, 1983;Kleiman et al, 1983;Campognone & Singer, 1986;Musser et al, 1986a;Quentin et al, 1987Quentin et al, , 1989.…”

Section: Methodsmentioning

confidence: 99%

“…Genital and mother-infant infections, neonatal septicaemia and meningitis episodes caused by Haernophilus injluenzae were reported with increased frequency in the 1980s (Wallace et al, 1983;Kleiman et al, 1983;Friesen & Cho, 1986;Quentin et al, 1987). Unlike strains recovered from invasive episodes in children occurring after the first month of life, those isolated from neonates are usually non-typable.…”

Section: Introductionmentioning

confidence: 99%

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Urogenital, maternal and neonatal isolates of Haemophilus influenzae: identification of unusually virulent serologically non-typable clone families and evidence for a new Haemophilus species

Quentin

Goudeau

Wallace

et al. 1990

Journal of General Microbiology

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A collection of 117 strains of Haemophilus influenzae, including 112 non-typable isolates recovered predominantly in the USA and France from genital, obstetric and neonatal sources, was characterized by the electrophoretic mobilities of 10 metabolic enzymes. Eighty-six distinctive multilocus chromosomal genotypes (electrophoretic types, ETs) were distinguished on the basis of allele profiles at the enzyme loci. Isolates of five allied biotype IV ETs were highly divergent from all other strains and hybridization of chromosomal DNA revealed that they undoubtedly represent a previously unrecognized species of Haemophilus. Isolates representing these ETs were recovered predominantly from obstetric infections and serious neonatal diseases and apparently possess specific tropism for the genital tract. Strains of these five ETs were present in samples from both the USA and France, but only in the USA did they cause bacteraemia and meningitis, an occurrence which probably reflects differences in patient management between the two countries. Although strains assigned to H. influenzae (sensu stricto) were strongly polymorphic in multilocus enzyme genotype, 69 % of isolates recovered from patients with meningitis and/or septicaemia were assigned to only two clone families, a result suggesting that some serologically nontypable strains of H. influenzae originating from the genital tract are unusually virulent.

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Hemophilus influenzae as a Cause of Urinary Tract Infections in Men

Gabre-Kidan¹

1984

Arch Intern Med

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Nontypable Haemophilus influenzae (Biotype 4) as a Neonatal, Maternal, and Genital Pathogen

Cited by 174 publications

References 55 publications

Isolation of Haemophilus influenzae and Haemophilus parainfluenzae from genital-tract specimens with a selective culture medium

Isolation of Haemophilus influenzae and Haemophilus parainfluenzae from genital-tract specimens with a selective culture medium

Urogenital, maternal and neonatal isolates of Haemophilus influenzae: identification of unusually virulent serologically non-typable clone families and evidence for a new Haemophilus species

Hemophilus influenzae as a Cause of Urinary Tract Infections in Men

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