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PREVALENCE, SPECIES COMPOSITION AND SPATIAL DISTRIBUTION OF COCKROACHES AS INFECTIOUS DISEASES VECTOR IN AHVAZ, SOUTHWEST IRAN

Author : Mona Sharififard, Ismaeil Alizadeh*, Elham Jahanifard, Amal Saki Malehi

Abstract

Background: Cockroaches are a serious health problem in urban areas which transmit infectious diseases pathogens and also intensify allergic reactions in human beings. The aims of this study were to evaluate the prevalence and spatial distribution of cockroaches in residential houses in Ahvaz city, Iran. This cross-sectional study was done in 520 randomly selected residential houses in 52 areas of Ahvaz city during 2017. Methods: Cockroaches were caught using sticky traps. Traps were collected after a week and transferred to the Medical Entomology laboratory and data was records through a checklist. Species were identified by the identification key. Spatial distribution was investigated through Arc GIS 9.3 software. Results: The collected cockroach species from residential houses in Ahvaz city were identified as Blatella germanica (25.8%), Periplaneta americana (11%), Supella longipalpa (5.6%), Blatta lateralis (3.3%) and Blatta orientalis (2.7%). The prevalence rate of cockroaches infestation was 36.3% in Ahvaz city. Cockroaches infestation was recorded from 49 out of 52 study areas in Ahvaz city except for Naft, Fulad and Polis areas. In total, 94% of the sampled areas were infected with cockroaches. Of 520 residential houses, 189 (36.3%) were infected and 331 (62.7%) showed non-cockroach infestation. Of the infected houses, 11.1%, 66.7% and 22.2% had low, moderate and severe cockroach infestation. The average of adults and nymphs at infected houses was respectively founded to be 37.5, 10, 2.5 and 102.8, 32.7, 17. Conclusion: Digital maps will provide authorities more information about the high risk areas that would assist in the control activities. Key words: Cockroach; GIS; Infestation; Distribution; Urban pest.

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