| infection by rickettsia bellii and candidatus "rickettsia amblyommii" in amblyomma neumanni ticks from argentina. | the tick species, amblyomma neumanni (acari: ixodidae) is the most frequent tick parasitizing humans in northwestern argentina. the present study evaluated the rickettsial infection among 55 a. neumanni adult free-living ticks collected in dean funes, córdoba province. ticks were individually processed by the hemolymph test with gimenez staining, isolation of rickettsia in vero cell culture by the shell vial technique, and polymerase chain reaction (pcr) targeting the citrate synthase rickettsia ... | 2007 | 17264991 |
| detection of a novel spotted fever group rickettsia in amblyomma parvum ticks (acari: ixodidae) from argentina. | the present study evaluated the rickettsial infection in amblyomma parvum ticks collected in northwestern córdoba province, argentina. each tick was subjected to dna extraction and tested by polymerase chain reaction (pcr) targeting fragments of the rickettsial genes glta and ompb. nine (69.2%) out of 13 adult ticks yielded expected pcr products for the two rickettsial genes. products from the ompb pcr were sequenced, generating dna sequences 100% identical for the nine pcr-positive ticks. three ... | 2007 | 17768597 |
| the natural hosts of larvae and nymphs of amblyomma tigrinum koch, 1844 (acari: ixodidae). | the hosts of larvae and nymphs of amblyomma tigrinum, a tick whose adults feed on wild and domestic canidae in south america, are uncertain. a 17 months survey was carried out trapping wild vertebrates in north-western córdoba, argentina, to evaluate their parasitism with a. tigrinum subadults. larvae and nymphs of this tick species were identified conventionally and by comparison of 16s rdna sequences with genbank deposited sequences. a total of 207 small and medium-sized rodents and 182 birds ... | 2006 | 16682121 |
| the natural hosts for larvae and nymphs of amblyomma neumanni and amblyomma parvum (acari: ixodidae). | based on the hypothesis that birds and rodents are important hosts for subadults of the neotropical amblyomma neumanni and amblyomma parvum ticks, a survey of these type of hosts was carried out from july 2004 to march 2006, in quilino (a. parvum) and dean funes (a. neumanni), córdoba province, argentina. additionally, monthly tick counts were performed on cattle and goats with occasional tick search in other domestic hosts. records of questing height of subadult ticks on vegetation were also ca ... | 2006 | 17006739 |
| ticks (acari: ixodida: argasidae, ixodidae) infesting humans in northwestern cordoba province, argentina. | ticks infesting humans were collected from september 2004 to august 2005 in northwestern córdoba in an area with a southern limit in the locality of dean funes (30 degrees 25's 64 degrees 20'w) and san josé de las salinas (30 degrees 00's 64 degrees 37'w) in the north. the collections consisted in ticks found attached on man obtained from three sources: 1) specimens fixed on two workers during two successive days per month of field work in the northern part of the area which belongs to western c ... | 2006 | 16871909 |
| seasonal distribution of larvae and nymphs of amblyomma tigrinum koch, 1844 (acari: ixodidae). | the seasonality of immature stages of amblyomma tigrinum was studied in an area of the chaco phytogeographical province in córdoba, argentina by monthly collection of larvae from ground feeding birds and sigmodontinae rodents, and nymphs from caviidae rodents from may 2005 to april 2007. an apparent peak of abundance was found from december to may but differences with other months of the year were not significant (p>0.05). these and previous results suggest that the parasitic stages of a. trigri ... | 2009 | 19833442 |