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Effects of permethrin on the salivary glands and neuroendocrine organs of unfed female Hyalomma (Hyalomma) dromedarii (Ixodoidea: Ixodidae). 2000

F S Mohamed, and M M Abbassy, and Z E Darwish, and G E Tetreault, and A S Marzouk, and M A Shoukry, and D J Fryauff, and G M Beavers
Vector Biology Research Program, U.S. Naval Medical Research Unit Number Three, Cairo, Egypt.

Permethrin-impregnated fabric has been shown to be an effective repellent against various tick species. However, some tick species are not repelled by this chemical. In Hyalomma dromedarii (Koch), permethrin exposure is reported to actually enhance the tick's attachment behavior. This study evaluated the histological effects of permethrin exposure on the salivary glands and neuroendocrine organs of unfed, virgin H. dromedarii ticks of uniform age. Three fabric treatments consisting of unwashed-untreated (control), washed after treatment (0.125 mg [AI] / cm2) and unwashed-treated were used after 5- and 10-min exposure times for unfed, unmated females. For all of the organs examined, the cellular structure of treated ticks differed from controls as evidenced by increases in cellular activity, as well as significant increases in the size of the cells of the organs under study (P < 0.05). These data conclusively demonstrate that an unexpected enhanced attachment response observed in this tick species after permethrin exposure is the direct result of increased neurosecretory and salivary gland activity induced by that exposure.

UI MeSH Term Description Entries
D007306 Insecticides Pesticides designed to control insects that are harmful to man. The insects may be directly harmful, as those acting as disease vectors, or indirectly harmful, as destroyers of crops, food products, or textile fabrics. Insecticide
D009490 Neurosecretory Systems A system of NEURONS that has the specialized function to produce and secrete HORMONES, and that constitutes, in whole or in part, an ENDOCRINE SYSTEM or organ. Neuroendocrine System,Neuroendocrine Systems,Neurosecretory System,System, Neuroendocrine,System, Neurosecretory,Systems, Neuroendocrine,Systems, Neurosecretory
D005260 Female Females
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000821 Animal Feed Foodstuff used especially for domestic and laboratory animals, or livestock. Fodder,Animal Feeds,Feed, Animal,Feeds, Animal,Fodders
D012469 Salivary Glands Glands that secrete SALIVA in the MOUTH. There are three pairs of salivary glands (PAROTID GLAND; SUBLINGUAL GLAND; SUBMANDIBULAR GLAND). Gland, Salivary,Glands, Salivary,Salivary Gland
D026023 Permethrin A pyrethroid insecticide commonly used in the treatment of LICE INFESTATIONS and SCABIES. Cyclopropanecarboxylic Acid, 3-(2,2-dichloroethenyl)-2,2-dimethyl-, (3-phenoxyphenyl)methyl ester,(m-Phenoxybenzyl)-cis,trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate,3-Phenoxybenzyl-(+-)-cis,trans-2,2-dichlorovinyl-2,2-dimethyl-cyclopropylcarboxylic acid, ester,3-Phenoxybenzyl-cis,trans-(1RS)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate,Ambush,Elimite,FMC-33297,NIA-33297,NRDC-143,NRDC-147,Nittifor,PP-557,Permethrin, (1R-cis)-Isomer,Permethrin, (1R-trans)-Isomer,Permethrin, (1S-cis)-Isomer,Permethrin, (1S-trans)-Isomer,Permethrin, (cis)-Isomer,Permethrin, (cis-(+-))-Isomer,Permethrin, (trans)-Isomer,Permethrin, (trans-(+-))-Isomer,Permethrin, trans-(1RS)-Isomer,S-3151,cis-(1RS)-permethrin,cis-permethrin,permethrin, cis-(1RS)-isomer,trans-(1RS)-Permethrin,trans-permethrin,FMC 33297,FMC33297,NIA 33297,NIA33297,NRDC 143,NRDC 147,NRDC143,NRDC147,PP 557,PP557,S 3151,S3151,cis permethrin,trans permethrin
D026863 Ixodidae A family of hardbacked TICKS, in the subclass ACARI. Genera include DERMACENTOR and IXODES among others. Ticks, Hardbacked,Hard Ticks,Hard Tick,Hardbacked Tick,Hardbacked Ticks,Tick, Hard,Tick, Hardbacked,Ticks, Hard

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