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J Med Microbiol 52 (2003), 693-696; DOI: 10.1099/jmm.0.05080-0
© 2003 Society for General Microbiology
ISSN 0022-2615

Outer-membrane-protein subtypes of Haemophilus influenzae isolates from North India

R. Kaur, A. Sharma, S. Majumdar, N. K. Ganguly and A. Chakraborti

Department of Experimental Medicine and Biotechnology, Postgraduate Institute of Medical Education and Research, Chandigarh –160012, India

Correspondence A. Chakraborti superoxide{at}sify.com

Received September 23, 2002
Accepted April 28, 2003

Haemophilus influenzae serotype b and non-typable isolates from blood, cerebrospinal fluid, sputum and throat swabs of patients and carriers in North India were analysed by outer-membrane protein (OMP) profiling. OMP analysis could differentiate the samples into 18 different subtypes. The non-typable isolates were more variable than the serotype b samples. OMP subtypes 1–6 were found only among the serotype b isolates and subtypes 7–18 among the non-typable isolates, while subtypes 2 and 8 were exhibited by both. The OMP profiles of isolates from blood, cerebrospinal fluid and sputum are in complete agreement with their ribotypes and RAPD fingerprints. The present study demonstrates for the first time the subtyping of Indian H. influenzae isolates by an easy and less-expensive method that is applicable to developing countries like India.

Abbreviations: CSF, cerebrospinal fluid; Hib, H. influenzae serotype b; NTHi, non-typable H. influenzae; OMP, outer-membrane protein.






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