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Susceptibility of Culicidae Mosquitoes to Some Insecticides Recommended by WHO in a Malaria Endemic Area of Southeastern Iran.

Fathian M, Vatandoost H, Moosa-Kazemi SH, Raeisi A, Yaghoobi-Ershadi MR, Oshaghi MA, Sedaghat MM - J Arthropod Borne Dis (2014)

Bottom Line: Anopheles culicifacies and Anopheles dthali were found susceptible or tolerant to insecticides.Culex pipiens was found resistance to DDT, propoxur, lambda-cyhalothrin and cyfluthrin whereas observed susceptible to malathion and tolerant to deltamethrin.Ochlerotatus caspius sl. was resistant to DDT, whereas found susceptible to other insecticides.

View Article: PubMed Central - PubMed

Affiliation: Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

ABSTRACT

Background: According to the national strategy plan on monitoring of insecticides resistance, this study was carried out to determine the base line susceptibility of the Culicidae mosquitoes to the WHO-recommended insecticides in an endemic focus of malaria in southeastern Iran.

Methods: Larval collection was carried out by dipping method and adult collection occurred by suction tube from January to December 2010. The susceptibility test was assessed to DDT 4 %, malathion 5 %, propoxur 0.1 %, deltamethrin 0.05 %, lambda-cyhalothrin 0.05 %, and cyfluthrin 0.15 % at different interval times (discriminative dose) followed by 24 h recovery period. The LT50 and LT90 values were calculated for plotting the regression line using Microsoft office Excel software ver. 2007.

Results: Anopheles stephensi was quite resistant to DDT and showed susceptible or tolerant to other insecticides. The LT50 and LT90 values to DDT in this species were 29.07, and 98.26 minutes, respectively. Anopheles culicifacies and Anopheles dthali were found susceptible or tolerant to insecticides. Culex pipiens was found resistance to DDT, propoxur, lambda-cyhalothrin and cyfluthrin whereas observed susceptible to malathion and tolerant to deltamethrin. Ochlerotatus caspius sl. was resistant to DDT, whereas found susceptible to other insecticides. Culisita longiareolata was susceptible to deltamethrin, whereas tolerant to other insecticides. The LT50 and LT90 values of Cs. longiareolata to DDT were 17.82, and 51.26 minutes.

Conclusion: We suggested the same study in different parts of the country for monitoring and evaluation of control measures.

No MeSH data available.


Related in: MedlinePlus

Location of study area in southeastern Iran, 2010
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Related In: Results  -  Collection


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Figure 1: Location of study area in southeastern Iran, 2010

Mentions: The study was carried out in Chabahar City, Siatan and Baluchistan Province, southeastern Iran (25°17′GN, 60°37′GE) (Fig. 1). The people engaged to agriculture, horticulture, livestock, fishing sailing, and hand Crafts including needlework, making carpet and musical instruments. The absolute maximum and average of temperature was reported 36 °C and 16.5 °C, respectively (Meteorological Organization of Iran, 2010). Average annual rainfall and humidity was 90mm and 79 %, respectively. Kajoo and Bishmont rivers are the largest rivers located in this area. Chabahar County with 24, 729 square kilometers (19.3%) comprised 3 cities, 5 distracts and 11 rural districts. The population of Chabahar reported 211,081 including 143,535 rural (68%) and 67,546 urban (32%). Naval Base near the 22 Bahman Squar (25° 18′GN,60°37′GE) in Chabahar city selected as fix station including, 30 households, and 114 population. Baluchi-Adam village (25° 47′GN, 61°16′GE) with 71 households, and 379 populations, and Bahoo-kalat village (25°43′GN, 61°25′GE), 198 households and 1064 population selected randomly as fixed stations. Sampling methods such as larval collection, Hand catch was carried out during January to December 2010 (WHO 1975, WHO 1975). These studies were conducted once every 15 days and collected mosquitoes were identified by specific systematic keys (Shahgudian 1960, Zaim and Cranston 1986).


Susceptibility of Culicidae Mosquitoes to Some Insecticides Recommended by WHO in a Malaria Endemic Area of Southeastern Iran.

Fathian M, Vatandoost H, Moosa-Kazemi SH, Raeisi A, Yaghoobi-Ershadi MR, Oshaghi MA, Sedaghat MM - J Arthropod Borne Dis (2014)

Location of study area in southeastern Iran, 2010
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4478415&req=5

Figure 1: Location of study area in southeastern Iran, 2010
Mentions: The study was carried out in Chabahar City, Siatan and Baluchistan Province, southeastern Iran (25°17′GN, 60°37′GE) (Fig. 1). The people engaged to agriculture, horticulture, livestock, fishing sailing, and hand Crafts including needlework, making carpet and musical instruments. The absolute maximum and average of temperature was reported 36 °C and 16.5 °C, respectively (Meteorological Organization of Iran, 2010). Average annual rainfall and humidity was 90mm and 79 %, respectively. Kajoo and Bishmont rivers are the largest rivers located in this area. Chabahar County with 24, 729 square kilometers (19.3%) comprised 3 cities, 5 distracts and 11 rural districts. The population of Chabahar reported 211,081 including 143,535 rural (68%) and 67,546 urban (32%). Naval Base near the 22 Bahman Squar (25° 18′GN,60°37′GE) in Chabahar city selected as fix station including, 30 households, and 114 population. Baluchi-Adam village (25° 47′GN, 61°16′GE) with 71 households, and 379 populations, and Bahoo-kalat village (25°43′GN, 61°25′GE), 198 households and 1064 population selected randomly as fixed stations. Sampling methods such as larval collection, Hand catch was carried out during January to December 2010 (WHO 1975, WHO 1975). These studies were conducted once every 15 days and collected mosquitoes were identified by specific systematic keys (Shahgudian 1960, Zaim and Cranston 1986).

Bottom Line: Anopheles culicifacies and Anopheles dthali were found susceptible or tolerant to insecticides.Culex pipiens was found resistance to DDT, propoxur, lambda-cyhalothrin and cyfluthrin whereas observed susceptible to malathion and tolerant to deltamethrin.Ochlerotatus caspius sl. was resistant to DDT, whereas found susceptible to other insecticides.

View Article: PubMed Central - PubMed

Affiliation: Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

ABSTRACT

Background: According to the national strategy plan on monitoring of insecticides resistance, this study was carried out to determine the base line susceptibility of the Culicidae mosquitoes to the WHO-recommended insecticides in an endemic focus of malaria in southeastern Iran.

Methods: Larval collection was carried out by dipping method and adult collection occurred by suction tube from January to December 2010. The susceptibility test was assessed to DDT 4 %, malathion 5 %, propoxur 0.1 %, deltamethrin 0.05 %, lambda-cyhalothrin 0.05 %, and cyfluthrin 0.15 % at different interval times (discriminative dose) followed by 24 h recovery period. The LT50 and LT90 values were calculated for plotting the regression line using Microsoft office Excel software ver. 2007.

Results: Anopheles stephensi was quite resistant to DDT and showed susceptible or tolerant to other insecticides. The LT50 and LT90 values to DDT in this species were 29.07, and 98.26 minutes, respectively. Anopheles culicifacies and Anopheles dthali were found susceptible or tolerant to insecticides. Culex pipiens was found resistance to DDT, propoxur, lambda-cyhalothrin and cyfluthrin whereas observed susceptible to malathion and tolerant to deltamethrin. Ochlerotatus caspius sl. was resistant to DDT, whereas found susceptible to other insecticides. Culisita longiareolata was susceptible to deltamethrin, whereas tolerant to other insecticides. The LT50 and LT90 values of Cs. longiareolata to DDT were 17.82, and 51.26 minutes.

Conclusion: We suggested the same study in different parts of the country for monitoring and evaluation of control measures.

No MeSH data available.


Related in: MedlinePlus