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Comparison of cockroach fungal contamination in the clinical and non-clinical environments from Iran

B. Davari, A.E. Hassanvand, H. Nasirian, S.A. Ghiasian, A. Salehzadeh, M. Nazari
  • B. Davari
    Department of Medical Entomology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran, Islamic Republic of
  • A.E. Hassanvand
    Department of Medical Entomology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran, Islamic Republic of
  • H. Nasirian
    Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran, Islamic Republic of | hanasirian@yahoo.com
  • S.A. Ghiasian
    Department of Parasitology and Mycology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran, Islamic Republic of
  • A. Salehzadeh
    Department of Medical Entomology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran, Islamic Republic of
  • M. Nazari
    Department of Medical Entomology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran, Islamic Republic of

Abstract

Cockroaches have been associated with human environments threatening human health. A cross-sectional study about cockroach fungal contamination in the hospital, restaurant and household environments from Khorramabad, Lorestan province of Iran between August 2015 and March 2016 was done. Sampling was uniformly carried out monthly from the randomly selected sites. Fungi were isolated from the external surfaces of cockroaches using standard method. Periplaneta americana (66.7%) was found the most infested cockroach, less percentage were observed in Blattella germanica (18.6%) and Blatta orientalis (14.7%). Hospitals (66.7%) were found the most infested places in comparison with households (18.6%) and restaurants (14.7%). Households (64.3%) were found the most cockroach fungal contaminated places than hospitals (49.0%) and restaurants (59.1%). The highest and the lowest infestation of cockroaches were observed in January (30.0%) and March (7.0%) respectively, while the highest and the lowest cockroach fungal contamination were observed in November (73.3%) and March (14.3%). B. germanica (60.7%) was the most fungal contaminated cockroach. Candida, Geotrichum and Penicillium were the most frequent cockroach fungal contaminating genera. Statistical analysis revealed significant differences between cockroach infestation places (P=0.022), locality (P=0.03), and monthly (P=0.0001) cockroach fungal contamination, respectively. As a conclusion, the highest cockroach fungal contamination was observed in B. germanica, followed by P. americana and B. orientalis. Some human fungal opportunistic pathogens were also found among the fungal contaminated cockroaches. Recent epidemiological survey showed that the mortality rates of the infective diseases were increased, indicating cockroaches involved in their transferring.

Keywords

Blattella germanica; Blatta orientalis; clinical and nonclinical environments; cockroach fungal contamination; Periplaneta americana

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Submitted: 2017-04-19 10:00:02
Published: 2017-09-28 11:13:10
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Copyright (c) 2017 B. Davari, A.E. Hassanvand, H. Nasirian, S. A. Ghiasian, A. Salehzadeh, M. Nazari

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