isolation and molecular characterization of a brazilian strain of borrelia anserina, the agent of fowl spirochaetosis.borrelia anserina the agent of fowl spirochaetosis, has a worldwide distribution, where it is transmitted by argas spp. ticks. the present study reports the first molecular characterization and in vitro isolation of an avian spirochaete strain from brazil, presumably identified as b. anserina originated from naturally infected argas miniatus ticks. dna fragments of the rrs and flab genes were amplified by pcr and sequenced to determine phylogenetic similarities. the resulting sequences were 99.8 ...200717222877
a review of the ticks (acari, ixodida) of brazil, their hosts and geographic distribution - 1. the state of rio grande do sul, southern brazil.a review of the ticks (acari, ixodida) of the state of rio grande do sul, southern brazil, was completed as a step towards a definitive list (currently indicated as 12) of such species, their hosts and distribution. the ticks: argas miniatus (poultry), ixodes loricatus (opossums), amblyomma aureolatum (dogs), a. calcaratum (anteaters), a. cooperi (capybaras), a. nodosum (anteaters), a. tigrinum (dogs) (neotropical) and rhipicephalus sanguineus (dogs) (introduced, cosmopolitan, afrotropical) were ...200010904399
ticks (acari: ixodoidea: argasidae, ixodidae) of chile.the tick species recorded from chile can be listed under the following headings: (1) endemic or established: argas keiransi estrada-peña, venzal and gonzalez-acuña, a. neghmei kohls and hoogstraal; ornithodoros amblus chamberlin; otobius megnini (dugès); amblyomma parvitarsum neumann; a. tigrinum koch; ixodes auritulus neumann; i. chilensis kohls; i. cornuae arthur, i. sigelos keirans, clifford and corwin; i. stilesi neumann; i. uriae white; rhipicephalus sanguineus koch. (2) probably establishe ...200515777007
[biological aspects of argas (persicargas) miniatus kock, 1844, (ixodoidea; argasidae) larvae in gallus gallus].the aim of the present study was to describe the biological aspects of larvae of argas miniatus at 27+/-1 masculinec and 80+/-5% and in environmental condition. domestic fowls with age lower than one week were infested with approximately 700 larvae of a. miniatus 15 days posthatching. the period of larval fixation varied from 3 to 7 days in four repetitions. approximately 90% of larvae were recovered in the 4th and 5th day after attachment. the mean weight increased approximately 81.37 times the ...200820059814
chemical identification of tagetes minuta linnaeus (asteraceae) essential oil and its acaricidal effect on ticks.the control of tick species that affect animal production is vital for the economic welfare of the cattle industry. this study focused on testing the acaricidal activity of the essential oil from the leaves and stems of tagetes minuta against several brazilian tick species, including rhipicephalus (boophilus) microplus, rhipicephalus sanguineus, amblyomma cajennense and argas miniatus. the chemical composition of the essential oil was determined by chromatography and spectroscopy analyses, which ...201323295821
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