PMID- 12904374 OWN - NLM STAT- MEDLINE DCOM- 20031023 LR - 20220311 IS - 0095-1137 (Print) IS - 1098-660X (Electronic) IS - 0095-1137 (Linking) VI - 41 IP - 8 DP - 2003 Aug TI - Detection of circulating gp43 antigen in serum, cerebrospinal fluid, and bronchoalveolar lavage fluid of patients with paracoccidioidomycosis. PG - 3675-80 AB - Paracoccidioidomycosis (PCM) is an important systemic fungal disease, particularly among individuals living and working in rural areas of endemicity in Latin America, who, without antifungal therapy, may develop fatal acute or chronic infection. For such patients, the detection of antibody responses by immunodiffusion is of limited value due to false-negative results. In contrast, the detection of Paracoccidioides brasiliensis gp43 circulating antigen may represent a more practical approach to the rapid diagnosis of the disease. Accordingly, an inhibition enzyme-linked immunosorbent assay (inh-ELISA) was developed for the detection of a 43-kDa P. brasiliensis-specific epitope incorporating a species-specific murine monoclonal antibody. With sera from patients with acute and chronic forms of the disease (n = 81), the overall sensitivity of the test was found to be 95.1%, while specificity was found to be 97.5% compared to that with normal human sera from blood donors (n = 93) and sera from patients with other chronic fungal infections (histoplasmosis [n = 33] and cryptococcosis [n = 20]). The inh-ELISA detected circulating antigen in 100% of patients with the acute form of PCM and in 95.31 and 100% of patients with the chronic multifocal and unifocal forms of PCM according to the patient's clinical presentation. Cerebrospinal fluid from 14 patients with neuroparacoccidioidomycosis and 13 samples of bronchoalveolar lavage fluid from patients with pulmonary unifocal PCM were also tested for gp43 detection, with the test showing 100% sensitivity and specificity. This novel, highly specific inh-ELISA represents a significant addition to the existing tests for the diagnosis of PCM. FAU - Marques da Silva, Silvia Helena AU - Marques da Silva SH AD - Department of Microbiology, Immunology and Parasitology, Federal University of Sao Paulo, Sao Paulo, Brazil. FAU - Colombo, Arnaldo Lopes AU - Colombo AL FAU - Blotta, Maria Heloisa Souza Lima AU - Blotta MH FAU - Lopes, Jose Daniel AU - Lopes JD FAU - Queiroz-Telles, Flavio AU - Queiroz-Telles F FAU - Pires de Camargo, Zoilo AU - Pires de Camargo Z LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Clin Microbiol JT - Journal of clinical microbiology JID - 7505564 RN - 0 (43 kDa protein, Paracoccidioides) RN - 0 (Antibodies, Monoclonal) RN - 0 (Antigens, Fungal) RN - 0 (Fungal Proteins) RN - 0 (Glycoproteins) SB - IM MH - Antibodies, Monoclonal MH - Antibody Formation MH - Antigens, Fungal/*blood/cerebrospinal fluid MH - Brazil MH - Bronchoalveolar Lavage Fluid/*microbiology MH - Enzyme-Linked Immunosorbent Assay/methods MH - Fungal Proteins/*blood/cerebrospinal fluid MH - Glycoproteins/*blood/cerebrospinal fluid MH - Humans MH - Paracoccidioides/isolation & purification MH - Paracoccidioidomycosis/blood/cerebrospinal fluid/*diagnosis/immunology MH - Reproducibility of Results PMC - PMC179774 EDAT- 2003/08/09 05:00 MHDA- 2003/10/24 05:00 PMCR- 2003/08/01 CRDT- 2003/08/09 05:00 PHST- 2003/08/09 05:00 [pubmed] PHST- 2003/10/24 05:00 [medline] PHST- 2003/08/09 05:00 [entrez] PHST- 2003/08/01 00:00 [pmc-release] AID - 0063 [pii] AID - 10.1128/JCM.41.8.3675-3680.2003 [doi] PST - ppublish SO - J Clin Microbiol. 2003 Aug;41(8):3675-80. doi: 10.1128/JCM.41.8.3675-3680.2003.