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Carreto-Binaghi, Laura E.; Morales-Villarreal, Fernando R.; García-de la Torre, Guadalupe; Vite-Garín, Tania; Ramirez, Jose-Antonio; Aliouat, El-Moukhtar; Martínez-Orozco, Jose-Arturo; Taylor, Maria-Lucia
International journal of infectious diseases, September 2019, 2019-Sep, 2019-09-00, 20190901, 2019-09-01, Volume: 86Journal Article
•H. capsulatum and P. jirovecii cause pulmonary diseases.•Coinfection with both fungal pathogens is an interesting clinical problem.•H. capsulatum and P. jirovecii coinfection also affects immunocompetent patients. Histoplasma capsulatum and Pneumocystis jirovecii are respiratory fungal pathogens that principally cause pulmonary disease. Coinfection with both pathogens is scarcely reported. This study detected this coinfection using specific molecular methods for each fungus in the bronchoalveolar lavage (BAL) of patients from a tertiary care hospital. BAL samples from 289 hospitalized patients were screened by PCR with specific markers for H. capsulatum (Hcp100) and P. jirovecii (mtLSUrRNA and mtSSUrRNA). The presence of these pathogens was confirmed by the generated sequences for each marker. The clinical and laboratory data for the patients were analyzed using statistical software. The PCR findings separated three groups of patients, where the first was represented by 60 (20.8%) histoplasmosis patients, the second by 45 (15.6%) patients with pneumocystosis, and the last group by 12 (4.2%) patients with coinfection. High similarity among the generated sequences of each species was demonstrated by BLASTn and neighbor-joining algorithms. The estimated prevalence of H. capsulatum and P. jirovecii coinfection was higher in HIV patients.
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