Abstract
This field study compared the infection level of Linguatula arctica in 14 treated and 19 control calves of the reindeer host Rangifer tarandus. Eighty calves were each treated subcutaneously with 1 ml (200-250 Mg/kg) ivermectin primo December, to ensure that a sufficient number of treated animals later would be selected by the herders for slaughtering. The target parasite L. arctica was then in the reproductive stage of its life cycle. The reindeer were slaughtered in ultimo February. In the treated group, one reindeer was found infected (prevalence 7.1, relative density 0,1), whereas the infection level for the 19 untreated animals was much higher (prevalence 68.4, relative density 7,3). Our conclusion is that ivermectin is an effective agent against L. arctica, (and possibly against other pentastomids because of their similar arthropodal nerve system). This is the first report of ivermectin treatment against a pentastomid species. Additionally, the study confirmed that ivermectin was fully effective against the nose bot fly Cephenemyia trompe.
Highlights
Treatment in reindeer Ivermectin is a systemically active and very efficient compound against many nematodes, parasitic insects and acarines, but it has no effect against trematodes, cestodes, protozoa and bacteria ( Campbell et al 1983; Campbell 1985; Bruce 1987; Jackson 1989)
Ivermectin has proved to be highly efficient i n the treatment of endoparasitic arthropods causing myiasis (Jackson 1989), including myiasis i n reindeer (Rangifer tarandus (L.))
Antiparasitic treatment has been used by reindeer veterinarians for a long time (Nordkvist 1967; Nieminen 1984)
Summary
Treatment in reindeer Ivermectin is a systemically active and very efficient compound against many nematodes, parasitic insects and acarines, but it has no effect against trematodes, cestodes, protozoa and bacteria ( Campbell et al 1983; Campbell 1985; Bruce 1987; Jackson 1989). Ivermectin has proved to be highly efficient i n the treatment of endoparasitic arthropods causing myiasis (Jackson 1989), including myiasis i n reindeer (Rangifer tarandus (L.)). Antiparasitic treatment has been used by reindeer veterinarians for a long time (Nordkvist 1967; Nieminen 1984). N o r d - Rangifer, 13 (3), 1993 kvist et al (1983) considered ivermctin to be the overall most effective drug against reindeer parasites. Since 1983 many herding districts have started using this broad-spectrum agent to control parasites like the myiasis-inducing larvae of the nose bot f l y and the warble f l y , gastrointestinal nematodes and the nematodes causing elaphostrongylosis and dictyocaulosis ( Nordkvist et al 1983; 1984; Nieminen 1989; Soveri et al 1990; Dieterich and Craigmill 1990)
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