Prevalence of Pneumocystis jirovecii pneumonia (2010–2013): The first Croatian report

Babic-Erceg, Andrea and Vilibic-Cavlek, Tatjana and Erceg, Marijan and Mlinaric-Missoni, Emilija and Begovac, Josip (2014) Prevalence of Pneumocystis jirovecii pneumonia (2010–2013): The first Croatian report. Acta Microbiologica et Immunologica Hungarica, 61 (2). pp. 181-188. ISSN 1217-8950

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Abstract

Pneumocystis jirovecii is an important cause of interstitial pneumonia particularly among immunocompromised hosts. We analysed the prevalence of P. jirovecii pneumonia (PCP) among HIV-infected and HIV-uninfected patients presented with interstitial pneumonia or acute respiratory syndrome hospitalized in six Croatian tertiary care hospitals. Over four-year period (2010–2013), a total of 328 lower respiratory tract samples: 253 (77.1%) bronchoalveolar lavage fluid, 43 (13.1%) tracheal aspirates and 32 (9.8%) bronchial aspirates from 290 patients were examined by real-time polymerase chain reaction (PCR). PCP was detected in 23 (7.9%) patients. The prevalence of PCP differed significantly among tested groups (χ² = 95.03; d.f. = 3; p < 0.001). HIV-infected patients were more often positive (56.6%, 95%CI = 37.3–72.4) compared to other groups (patients with malignant disease 7.7%, 95%CI = 2.6–20.3; transplant patients 7.7%, 95%CI = 2.2–24.1; patients with other diagnosis 1.5%, 95%CI = 0.5–4.4). Majority of HIV-positive patients (80%) were newly diagnosed cases. Our results indicate that HIV-infected patients still represents the main risk group for P. jirovecii infection. PCP is responsible for pneumonia in 56.6% HIV-positive patients in Croatia, primarily those who do not know that they are HIV infected.

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