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Background & aim: Flies are important in the region in terms of mechanical transmission of pathogens, sciatica and forensic entomological research. Identification of species in different regions is the first and most important way to control vector-borne diseases in the region. Therefore, the aim of the present study was to determine the diversity of species and relative abundance of flies of medical importance in Golestan province during 2018-2019. Methods:In the present descriptive study, the samples included medically important flies, which were sampled in both urban and rural areas, including eight stations in Ramyan city in 2018.Trapping was done monthly, on sunny days and on the hottest day of the month. Entomological nets and cone traps were used to catch adult flies. Species identification was performed based on valid keys. The collected data were analyzed using Microsoft Excel software. Results:In the present study, 10 species of Musca domestica (housefly) (53.75), Muscina stabulans (7.26), Lucilia ceasar (14.39), Lucilia sericata (7.91), Calliphora vicina (8.95), Sarcophaga africa (1.55), Sarcophaga aegyptica (0.51), Calliphora vomitoria (3.48), Sarcophaga argyrostoma (0.75), Muscina levida (0.18) in three family including Muscovidae, Sarcophagidae and Acrostida were captured. The most abundance of flies were observed in garbage collection sites and animal places. Musina levida species was reported for the first time from northern Iran in this study. Based on the results of temperature and humidity fluctuations, it was established that the higher temperature and decreasing humidity, the more abundance of flies' population were obsereved. Conclusion:Due to the high abundance of flies in waste collection sites and animal sites, rapid transfer of non-residential areas and their sanitary burial is necessary to reduce the population of flies. It is necessary to move animals out of residential areas and provide health advice to people and health centers on diseases transmitted by flies in the warmer months of the year.

Background: Seasonal activity patterns of mosquitoes are essential as baseline knowledge to understand the transmission dynamics of vector-borne diseases. This study was conducted to evaluate the monthly dynamics of the mosquito populations and their relation to meteorological factors in Mazandaran Province, north of Iran.Methods: Mosquito adults and larvae were collected from 16 counties of Mazandaran Province using different sampling techniques, once a month from May to December 2014. “Index of Species Abundance” (ISA) along with “Standardized ISA” (SISA) was used for assessing the most abundant species of mosquitoes based on the explanations of Robert and Hsi. Pearson’s correlation coefficient (R) was used to assess the relationships between the monthly population fluctuations and meteorological variables. Results: Overall, 23750 mosquitoes belonging to four genera and nineteen species were collected and identified. The highest population density of mosquitoes was in July and the lowest in May. The ISA/SISA indices showed the values of ISA/SISA: 1(larvae) and 1.25/0.973 (adult) in total catch human and shelter pit (ISA/SISA:1.68/0.938) for Culex pipiens and Culex tritaeniorhynchus, respectively, species that had the highest activity peak in July. A significant positive correlation was observed between Cx. tritaeniorhynchus and mean temperature (R: 0.766, P < 0.027).Conclusions: The results indicated that the mosquitoes are more active in July, Cx. pipiens and Cx. tritaeniorhynchus were the most abundant species, due to the potential of these species as vectors of numerous pathogens, control programmes can be planed based on their monthly activity pattern in the area.