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  • Title: Evidence that sulfisoxazole, an antibacterial sulfonamide, can adversely affect the development of Brugia pahangi in Aedes aegypti mosquitoes.
    Author: Jaffe JJ, Doremus HM, Meymarian E, Chrin LR.
    Journal: J Parasitol; 1978 Apr; 64(2):193-7. PubMed ID: 641660.
    Abstract:
    The average number of infective larvae recovered from Brugia pahangi-infected Aedes aegypti was approximately one-half that recovered from the controls after the former group of infected mosquitoes had ingested a 1.0% solution of sulfisoxazole diolamine (SXZ) in 10% sucrose-water for 4 consecutive days, beginning 4 days after infection. Most of the filarial larvae from the SXZ-treated mosquitoes were small and sluggish compared with those from the controls. There was no increased mortality of mosquitoes that ingested 1.0% SXZ in sugar-water for 4 days. Average filarial larval burdens were not decreased in mosquitoes that ingested a solution of 10(-6) M methotrexate (MTX), a potent dihydrofolate reductase inhibitor, in sugar-water for 4 days, beginning 4 days after infection. The distributional pattern of larval burdens in mosquitoes that ingested combined 1.0% SXZ and 10(-6) M MTX in sugar-water for 4 days closely resembled that seen in mosquitoes that had imbibed 1.0% SXZ only. Average filarial larval burdens were not decreased in mosquitoes with 4-day-old B. pahangi infections that fed upon jirds which received intraperitoneal injections of SXZ (2 g/kg) and MTX (1 mh/kh), alone and in combination, 1 hr previously. Survival of the mosquitoes that fed upon the drug-treated hosts was unaffected, as was the hatchability of their eggs and subsequent growth and development of the mosquito larvae.
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