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Prevalence of Neisseria meningitidis in family members of patients with meningococcal infection

Published online by Cambridge University Press:  25 March 2010

J. A. Saez-Nieto
Affiliation:
Servicio de Bacteriología, Centro Nacional de Microbiología, Virología e Inmunología Sanitarias, Majadahonda, Madrid, Spain
J. Campos
Affiliation:
Servicio de Microbiología y Unidad de Cuidados Intensivos, Hospital de San Juan de Dios, Barcelona, Spain
C. Latorre
Affiliation:
Servicio de Microbiología y Unidad de Cuidados Intensivos, Hospital de San Juan de Dios, Barcelona, Spain
T. Juncosa
Affiliation:
Servicio de Microbiología y Unidad de Cuidados Intensivos, Hospital de San Juan de Dios, Barcelona, Spain
M. Sierra
Affiliation:
Servicio de Microbiología y Unidad de Cuidados Intensivos, Hospital de San Juan de Dios, Barcelona, Spain
T. Garcia-Tornell
Affiliation:
Servicio de Microbiología y Unidad de Cuidados Intensivos, Hospital de San Juan de Dios, Barcelona, Spain
B. Garcia-Barreno
Affiliation:
Servicio de Bacteriología, Centro Nacional de Microbiología, Virología e Inmunología Sanitarias, Majadahonda, Madrid, Spain
C. Lopez-Galindez
Affiliation:
Servicio de Bacteriología, Centro Nacional de Microbiología, Virología e Inmunología Sanitarias, Majadahonda, Madrid, Spain
J. Casal
Affiliation:
Servicio de Bacteriología, Centro Nacional de Microbiología, Virología e Inmunología Sanitarias, Majadahonda, Madrid, Spain
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Summary

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The aim of the study was first, to determine the prevalence of Neisseria meningitidis among the family members living with patients suffering from meningococcal infections, and second, to ascertain the distribution among these family members of strains epidemiologically related to those isolated from patients.

Forty-two family groups were studied and 135 nasopharyngeal samples were taken from family members living with patients.

Twenty family groups were found to contain meningococcal carriers, and of these 20, 13 contained a carrier of the strain that caused the infection (65%). Among the family members who were carriers, the mother and father most frequently yielded the strain which caused the illness.

The serotypes most frequently encountered both in patients and carriers were 2 and 8, as well as nontypable strains.

The polyacrylamide gel electrophoretic patterns (PAGE) most frequently found were II and IV. A notable feature of the study is the high resistance of the strains to sulphadiazine, since more than 90% of the strains found in patients and more than 75% of those from carriers possessed a minimum inhibitory concentration greater than or equal to 10μg/ml.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1982

References

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