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chemical control of the heartwater vectors.this paper reviews available literature on the efficacy of acaricides against amblyomma hebraeum and other tick species, and presents information on tests done with registered chemicals in the laboratory. little published information is available on the efficacy of chemicals specifically against a. hebraeum. a host of formulations are registered for use as acaricides on cattle, sheep, and goats in south africa and thus, by implication, against this species. resistance has only been described to ...19873329335
experimental transmission of cowdria ruminantium by the gulf coast tick amblyomma maculatum: danger of introducing heartwater and benign african theileriasis onto the american mainland.the tick amblyomma maculatum proved to be an experimental vector of cowdria ruminantium, the cause of heartwater of ruminants. transstadial transmission from larva to nymph and from larva through nymph to adult was successful; however, an experiment on transovarial transmission gave negative results. neither a americanum nor a cajennense transmitted the infection. there is a potential danger of the disease gaining access to the american mainland from the caribbean where it is known to occur and ...19826808870
detection of "candidatus rickettsia sp. strain argentina"and rickettsia bellii in amblyomma ticks (acari: ixodidae) from northern argentina.ixodid ticks were collected from vegetation and from humans, wild and domestic mammals in a rural area in the semi-arid argentine chaco in late spring 2006 to evaluate their potential role as vectors of spotted fever group (sfg) rickettsiae. a total of 233 adult ticks, identified as amblyomma parvum, amblyomma tigrinum and amblyomma pseudoconcolor, was examined for rickettsia spp. we identified an sfg rickettsia of unknown pathogenicity, "candidatus rickettsia sp. strain argentina", in a. parvum ...201020186466
gotch ear in a goat: a case report.abstract a 1-year-old castrated male saanen goat was observed to have drooping and edema of the left ear consistent with published accounts of gotch ear in cattle associated with a tick bite. the goat's left ear was edematous from the tip of the pinna to the base of the ear. no signs of trauma or infectious processes were observed. three engorged gulf coast ticks (amblyomma maculatum) were observed attached inside the ear. ticks were removed and the ear biopsied at tick attachment sites. the aff ...201121395411
gotch ear: a poorly described, local, pathologic condition of livestock associated primarily with the gulf coast tick, amblyomma maculatum.gotch ear is a condition in animals in which the ear is swollen, deformed, curled, drooped, possibly necrotic, and is usually associated with attachment by the gulf coast tick, amblyomma maculatum. little is known of the etiology or epidemiology of gotch ear in livestock. reports generally describe the condition in cattle, but it has also been reported in horses and mules and more recently in a goat. this review explores the history and etymology of the term "gotch ear" and reports on current st ...201122047764
detection of rickettsia parkeri from within piura, peru, and the first reported presence of candidatus rickettsia andeanae in the tick rhipicephalus sanguineus.domestic farm animals (n=145) were sampled for the presence of ectoparasites in northwestern peru during march, 2008. ninety domestic animals (62%) were positive for the presence of an ectoparasite(s) and produced a total collection of the following: 728 ticks [amblyomma maculatum, anocentor nitens, rhipicephalus (boophilus) microplus, rhipicephalus sanguineus, and otobius megnini], 12 lice (haematopinus suis), and 3 fleas (ctenocephalides felis). a rickettsia genus-specific qpcr assay was perfo ...201323488453
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