TY - JOUR T1 - A case of <em>Haemophilus parainfluenzae</em>pneumonia JF - Thorax JO - Thorax SP - 623 LP - 624 DO - 10.1136/thorax.55.7.623 VL - 55 IS - 7 AU - A Pillai AU - J L Mitchell AU - S L Hill AU - R A Stockley Y1 - 2000/07/01 UR - http://thorax.bmj.com/content/55/7/623.abstract N2 - A 41 year old woman presented with community acquired pneumonia (CAP) which failed to resolve following treatment with amoxycillin and cefaclor prior to referral. Quantitative culture of sputum revealed a pure growth of Haemophilus parainfluenzae and, following antibiotic susceptibility testing of the isolate, ciprofloxacin was prescribed resulting in resolution of the infection. Immunological investigations showed that the patient had a high titre of H parainfluenzae specific IgM. The combination of a pure growth of H parainfluenzae, a response to appropriate antimicrobial therapy, and the presence of a specific antibody response indicated that this organism had a pathogenic role in the patient's pneumonia and should be considered in the differential diagnosis of CAP. ER -