Seasonal Activity of Adult Mosquitoes (Diptera: Culicidae) in a Focus of Dirofilariasis and West Nile Infection in Northern Iran

  • Shahyad Azari-Hamidian Research Center of Health and Environment, Guilan University of Medical Sciences, Rasht, Iran and School of Health, Guilan University of Medical Sciences, Rasht, Iran
  • Behzad Norouzi Research Center of Health and Environment, Guilan University of Medical Sciences, Rasht, Iran
  • Ayoob Noorallahi Department of Disease Control and Prevention, Health Vice-Chancellorship, Guilan University of Medical Sciences, Rasht, Iran
  • Ahmad Ali Hanafi-Bojd Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
Keywords: Dirofilaria, Flavivirus, Flaviviridae, Vectors, Iran

Abstract

Background: Mosquito-borne arboviruses such as West Nile, dengue, Rift Valley fever, and Sindbis viruses and the nematode Dirofilaria are reported in Iran, but there is little information on the seasonal activity of their vectors in the country. We aimed to determine the seasonal activity of adult mosquitoes (Diptera: Culicidae) in a focus of diro­filariasis and West Nile infection in Guilan Province, northern Iran.  Methods: Collections were carried out using light traps in seven counties at least two times from random sites and every two weeks from a fixed site (Pareh Village, Rudbar County) during Aug–Dec 2015 and Apr–Oct 2016. Results: Overall, 16357 adult mosquitoes comprising 18 species representing seven genera were identified. The most prevalent species were Cx. theileri (23.59%), Cx. tritaeniorhynchus (20.75%), Cx. pipiens (19.37%), Ae. vexans (18.18%), An. pseudopictus (10.92%) and An. maculipennis s.l. (5.48%). Aedes pulcritarsis and Cx. perexiguus were found for the first time in Guilan Province. The active season of adult mosquitoes extended from early May to early Oct in the fixed site. There was no significant regression between the abundance of adult mosquitoes and the meteor­ological data during active season in the fixed site (P> 0.05, R2= 0.31). Conclusion: Though no significant regression between the abundance of mosquitoes and the meteorological data was observed during active season, temperature and rice fields had a great influence in starting and ending active season in the region.

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Published
2018-10-12
How to Cite
1.
Azari-Hamidian S, Norouzi B, Noorallahi A, Hanafi-Bojd AA. Seasonal Activity of Adult Mosquitoes (Diptera: Culicidae) in a Focus of Dirofilariasis and West Nile Infection in Northern Iran. J Arthropod Borne Dis. 12(4):398-13.
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Original Article