Document 0639 DOCN M9610639 TI Community-acquired pneumonia: impact of immune status. DT 9601 AU Mundy LM; Auwaerter PG; Oldach D; Warner ML; Burton A; Vance E; Gaydos CA; Joseph JM; Gopalan R; Moore RD; et al; Department of Medicine, Johns Hopkins Medical Institutions,; Baltimore, Maryland, USA. SO Am J Respir Crit Care Med. 1995 Oct;152(4 Pt 1):1309-15. Unique Identifier : AIDSLINE MED/96023209 AB This cross-sectional and prospective one year study evaluated adults admitted to an inner city hospital with community-acquired pneumonia. The study used extensive diagnostic methods to evaluate the etiologies of community-acquired pneumonia in hospitalized patients with differing immunologic status. Of 385 study patients, concurrent problems associated with immunosuppression were noted in 221 (57%) patients, 180 of whom were human immunodeficiency virus (HIV)-infected. The five most common causes of community-acquired pneumonia were: Streptococcus pneumoniae, Pneumocystis carinii, aspiration, Hemophilus influenzae, and gram-negative bacilli. Only 8.3% of patients had either Legionella, Chlamydia pneumoniae or Mycoplasma pneumoniae. Despite use of state-of-the-art diagnostic techniques, no diagnosis was made in 46 of 180 (25.6%) HIV-infected patients, 56 of 164 (34.1%) immunocompetent patients, and 20 of 41 (48.8%) non-HIV-infected immunosuppressed patients. The diagnostic yield of pre-antibiotic sputum culture for conventional bacteria was 99/155 (63.9%) compared to 52 of 169 patients (32.7%) with adequate post-antibiotic sputum culture (p < 0.0001). Although S. pneumonia continues to be the most commonly identified etiologic agent of community-acquired pneumonia, it is surpassed by P. carinii in the HIV-infected patient population. The apparent decline in the frequency of S. pneumoniae in our series presumably reflects administration of antibiotics prior to procurement of sputum culture. The paucity of atypical agents in this study support the current American Thoracic Society guidelines for selective use of macrolide therapy in immunocompetent adults hospitalized with community-acquired pneumonia.(ABSTRACT TRUNCATED AT 250 WORDS) DE Adult AIDS-Related Opportunistic Infections/EPIDEMIOLOGY/*IMMUNOLOGY/ MICROBIOLOGY Baltimore/EPIDEMIOLOGY Community-Acquired Infections/EPIDEMIOLOGY/IMMUNOLOGY/ MICROBIOLOGY Comparative Study Cross-Sectional Studies Female Human *Immunocompromised Host Male Middle Age Pneumonia/EPIDEMIOLOGY/*IMMUNOLOGY/MICROBIOLOGY Pneumonia, Pneumocystis carinii/EPIDEMIOLOGY/IMMUNOLOGY Prospective Studies JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).