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[Resistance in Haemophilus influenzae in Spain. 2d study (1990)]
E J Perea1, M C García, M J Clavijo
1Servicio de Microbiología, Hospital Universitario Virgen Macarena, Sevilla.
Enfermedades Infecciosas Y Microbiologia Clinica
|January 1, 1993
Summary
Antimicrobial resistance in *Haemophilus influenzae* strains increased slightly in Spain between 1986 and 1990. Resistance varied geographically, with high rates of beta-lactamase production and multi-drug resistance observed.
Area of Science:
- Microbiology
- Infectious Diseases
- Antimicrobial Resistance
Background:
- *Haemophilus influenzae* is a significant human pathogen.
- Multicentric studies are crucial for understanding national antimicrobial resistance patterns.
Purpose of the Study:
- To assess the antimicrobial resistance of *Haemophilus influenzae* strains isolated in Spain in 1990.
- To compare resistance trends with previous findings from 1986.
Main Methods:
- A total of 308 *H. influenzae* strains were collected from 10 Spanish cities.
- Antimicrobial susceptibility testing was performed using microdilution in Isosensitest broth.
Main Results:
- 35% of strains produced beta-lactamase, prevalent in systemic infections and specific cities (Madrid, Barcelona).
- High resistance rates were observed for chloramphenicol (28.6%), tetracycline, cotrimoxazole (67.5%), and cefaclor (60.7%).
- Only 9.1% of strains were susceptible to all tested antimicrobials, with 39% exhibiting multi-drug resistance.
Conclusions:
- A slight increase in antimicrobial resistance was noted compared to 1986.
- Geographical variations in resistance were significant, particularly for beta-lactamase production, chloramphenicol, tetracycline, and cotrimoxazole.