| [interrelatio of acari ixodidae and hosts of edentata of the serra da canastra, minas gerais, brazil]. | we received for examination a small colection of ticks captured in the national park of the serra da canastra (mg), between 1979 and 1980. the authors demonstrated the existence of a broad co-accomodation of amblyomma pseudoconcolor on edentata of the family dasypodidae, being dasypodini the tribe more adjusted to this infestation. in conformity to the figs 1 and 2, dasypodini are probably the real hosts of a. pseudoconcolor and also the oldest hosts. for the first time, a. pseudoconcolor is als ... | 1989 | 2319951 |
| notes on the biology of amblyomma dissimile koch, 1844 (acari:ixodida) on bufo marinus (linnaeus, 1758) from brazil. | amblyomma dissimile is a common ectoparasite of cold blooded animals and is an accidental ectoparasite of some wild mammals. details of the biology of specimens from the state of amapá were studied in the laboratory in a humidity chamber at an average environmental temperature of 19.5 degrees c, using bufo marinus as host for the time in brazil. we also report the first record of this species in the state of minas gerais. | 1994 | 7823816 |
| rickettsiae-infected ticks in an endemic area of spotted fever in the state of minas gerais, brazil. | a study on tick-borne rickettsiosis was developed in the county of santa cruz do escalvado, state of minas gerais, brazil, where a clinical case of the disease, confirmed by necropsy, had been reported. of the 1,254 ticks collected, 1,061 belonged to the amblyomma genus, 57 to the rhipicephalus sanguineus species, 81 to boophilus microplus, and 46 to anocentor nitens. the hemolymph test associated with giménez staining showed that 18 of the 221 a. cajennense specimens, 1 of the 16 r. sanguineus, ... | 1997 | 9361740 |
| population dynamics of the free-living stages of amblyomma cajennense (fabricius, 1787) (acari: ixodidae) on pastures of pedro leopoldo, minas gerais state, brazil. | a study on the population behavior of amblyomma cajennense larvae, nymphs and adult free-living stages was carried out in pedro leopoldo county, minas gerais state, brazil, from july 1995 to july 1997. larvae were collected from pasture from april to october using the technique of drag sampling with flannelette. the maximal larval population was observed during autumn (may) representing, respectively, 48 and 82% of the total numbers recovered during the first and the second years of the experime ... | 2000 | 10996741 |
| seasonal dynamics of ticks (acari: ixodidae) on horses in the state of são paulo, brazil. | natural tick infestations were assessed every 14 days on horses over a 2-year period. amblyomma cajennense adult ticks were counted individually, without detachment from the horses. larvae and nymphs of a. cajennense were collected using a rubber scraper that scratched engorged immature ticks from the host. adult females of anocentor nitens larger than 4mm length were counted on the horses. blood samples were also obtained from the horses every 14 days and macroclimatic data were obtained for th ... | 2002 | 11879967 |
| biology of amblyomma aureolatum (pallas, 1772) (acari: ixodidae) on some laboratory hosts in brazil. | the ixodid amblyomma aureolatum is suspected to play a role in the epidemiology of wild life-cycle hemoparasites, which frequently infect dogs in rural and hunting areas in brazil. little is known about its bionomics. the objective of the present study was to evaluate some bionomic aspects of a. aureolatum ticks in brazil. one engorged female, collected from a dog (canis familiaris) in são sebastião das aguas claras, state of minas gerais, was used to establish a colony in the laboratory. subseq ... | 2002 | 12386709 |
| seasonal dynamics of the cayenne tick, amblyomma cajennense on horses in brazil. | the population dynamics of all stages of the cayenne tick, amblyomma cajennense (fabricius) (acari: ixodidae) on horses was evaluated over a period of 2 years in the district of pedro leopoldo, state of minas gerais, brazil. every 14 days, the left side of 20 horses was brushed for collection of immature stages; counts of adults were also undertaken. infestation by larvae was detected from april to august, whereas nymphs were observed from june to october. infestation by adults was detected thro ... | 2003 | 14651655 |
| detection of rickettsia rickettsii in the tick amblyomma cajennense in a new brazilian spotted fever-endemic area in the state of minas gerais. | the present study evaluated rickettsial infection in amblyomma spp. ticks collected in a farm in coronel pacheco, a brazilian spotted fever (bsf) endemic area. a total of 78 a. cajennense and 78 a. dubitatum free-living adult ticks were collected and tested by polymerase chain reaction (pcr) targeting a fragment of the rickettsial gene glta. only one pool of three a. cajennense ticks showed the expected product by pcr. this pool was further tested by pcr using sets of primers targeting the ricke ... | 2006 | 16444414 |
| [characterization of rickettsia spp. circulating in a silent peri-urban focus for brazilian spotted fever in caratinga, minas gerais, brazil]. | the present study was intended to characterize rickettsia spp. circulating in arthropod vectors in caratinga, minas gerais, brazil, by pcr and to investigate the presence of antibodies against the spotted fever rickettsiae group (sfrg) in dogs and horses. 2,610 arthropods were collected and taxonomically identified. dna samples obtained from these vectors were submitted to pcr and cycle-sequenced. ctenocephalides and amblyomma cajennense showed sequences presenting 100.0% homology with r. felis. ... | 2006 | 16583093 |
| sero-prevalence and risk indicators for canine ehrlichiosis in three rural areas of brazil. | ehrlichia canis has a worldwide geographic distribution, occurring particularly in tropical and subtropical areas. in brazil, the main vector in urban areas is believed to be the brown dog tick rhipicephalus sanguineus, but little is known about the occurrence, transmission and other epidemiological aspects of canine ehrlichiosis in rural areas, where amblyomma ticks are found more frequently than r. sanguineus. a sero-prevalence study of canine ehrlichiosis was carried out in three distinct rur ... | 2007 | 17204439 |
| [strategic control of amblyomma cajennense (fabricius, 1787) (acari: ixodidae) on horses, minas gerais, brazil - part i]. | the aim of this study was to verify the efficiency of a strategic control program of amblyomma cajennense in horses under field conditions. acaricide treatments were applied at seven days intervals and divided in two series, the first one beginning in april 2004 (eight treatments), and the second one beginning in july 2004 (five treatments), aiming to control larvae and nymphs of the tick. a pyrethroid chemical base cypermethrin 0.015% was used for spraying the horses. there was a reduction of 4 ... | 2007 | 18373899 |
| canine babesiosis caused by babesia canis vogeli in rural areas of the state of minas gerais, brazil and factors associated with its seroprevalence. | this epidemiological survey on canine babesiosis was carried out in three distinct rural regions (lavras, belo horizonte and nanuque) of the state of minas gerais, brazil. ticks and blood samples were collected during a dry season (lavras, n=92; belo horizonte, n=50; nanuque, n=102) and the subsequent rainy season (lavras, n=71; belo horizonte, n=28; nanuque, n=66) from dogs living on farms. plasma samples were analyzed by the indirect fluorescent antibody test for detection of anti-babesia cani ... | 2009 | 18723199 |
| rickettsial spotted fever in capoeirão village, itabira, minas gerais, brazil. | the present study investigated the infection by spotted fever rickettsia in an endemic area for brazilian spotted fever (bsf; caused by rickettsia rickettsii) in minas gerais state, brazil. human, canine and equine sera samples, and amblyomma cajennense adult ticks collected in a rural area of itabira city, minas gerais state were tested for rickettsial infection. through immunofluorescence assay (ifa) we demonstrated the presence of antibodies anti-r. rickettsii in 8.2%, 81.3% and 100% of the h ... | 2008 | 18949349 |
| [characterization of ectoparasites on dogs in the nucleus of urban expansion of juiz de fora, minas gerais, brazil]. | the present work studied the characterization of ectoparasites on dogs in the nucleus of urban expansion of juiz de fora, minas gerais, brazil. the collections were conducted from july to september 2003, examining 101 dogs of no defined breed. the ectoparasites were collected through visual and tactile inspection of the animals' bodies, and were then placed in bottles with 70 degrees gl ethanol and identified under a stereomicroscope. specimens were clarified and mounted on slides for analysis u ... | 2008 | 19265575 |
| francisella-like endosymbiont dna and francisella tularensis virulence-related genes in brazilian ticks (acari: ixodidae). | ticks are vectors of a variety of pathogens, including francisella tularensis. bacteria in the genus francisella have been identified mostly in the northern hemisphere and include tick endosymbionts. francisella has never been described in brazil, where amblyomma spp. ticks are known as the vector of many bacterial zoonotic pathogens. in the present work, we have identified bacterial dna sequences with identity to francisella genes in amblyomma dubitatum neumann dermacentor nitens (neumann), and ... | 2009 | 19351090 |
| ticks (acari: ixodidae) within various phytophysiognomies of a cerrado reserve in uberlândia, minas gerais, brazil. | cerrado biome, the south american savannah, covers about 2 million km(2) and is very rich in endemic species but threatened by agriculture. in this report free-living tick species are presented, and their seasonal and relative distribution within the various phytophysiognomies in a small cerrado reserve in minas gerais state, brazil. overall 2,694 free-living ticks were found during a 2 years sampling period with co(2) traps and cloth dragging. of these, 73.5% were amblyomma cajennense and 0.6% ... | 2010 | 19693680 |
| biological parameters of ticks (amblyomma cajennense fabricius, 1787) under field and laboratory conditions in pedro leopoldo, state of minas gerais, brazil. | this study evaluated the biological parameters of the duration of the pre-oviposition and egg incubation periods and maximum survival of unfed larvae, under field and laboratory conditions, with the aim of providing support for more rational measures for controlling amblyomma cajennense. this study was conducted at the experimental farm of the veterinary school of the federal university of minas gerais. every 14 days, from september 1997 to march 1998 and from october 1998 to april 1999, six net ... | 2008 | 20059808 |
| [seasonal dynamics of the free-living stages of amblyomma cajennense and amblyomma dubitatum (acari: ixodidae) in an endemic area for spotted fever in coronel pacheco region, minas gerais state]. | a study on the population behavior of amblyomma cajennense and amblyomma dubitatum larvae, nymphs and adult free-living stages was carried out in coronel pacheco county, minas gerais state, brazil, a spotted feverendemic area from may 2006 to april 2008. larvae of amblyomma sp. were collected from pasture using the technique of drag sampling with flannelette during may to october 2006, starting from february 2007 to november 2007 and starting from march 2008. well-defined peaks of populations oc ... | 2008 | 20059821 |
| ticks (acari: ixodidae) on dogs from uberlândia, minas gerais, brazil. | uberlândia in minas gerais state, southeastern brazil, has 622 000 inhabitants and is located in the cerrado biome, the south american savannah. the city dog population is estimated at 82 000 and identification of tick species and infestation prevalence on this host has not been determined. a major infectious disease of dogs in the city, canine ehrlichiosis, is transmitted by rhipicephalus sanguineus ticks. at the same time, autochthonous leishmaniosis has been recently described in the city and ... | 2010 | 20537111 |
| rickettsial infections of dogs, horses and ticks in juiz de fora, southeastern brazil, and isolation of rickettsia rickettsii from rhipicephalus sanguineus ticks. | the present study was performed in an area endemic for brazilian spotted fever (bsf) in juiz de fora, state of minas gerais, brazil, during the years 2007 and 2008, when fatal cases of bsf (caused by rickettsia rickettsii) were reported. adult ticks (acari: ixodidae) identified as rhipicephalus sanguineus (latreille) and amblyomma cajennense (fabricius) were collected from dogs and horses, respectively, and tested by polymerase chain reaction (pcr). overall, 13.1% of the rh. sanguineus ticks and ... | 2010 | 20950356 |
| ticks on birds in a forest fragment of brazilian cerrado (savanna) in the municipality of uberlândia, state of minas gerais, brazil. | this is a report of tick species, parasite prevalence and infestation intensity of birds in a forest fragment (18° 56' 57'' s and 48° 12' 14'' w) within the brazilian cerrado (savanna), in the municipality of uberlândia, state of minas gerais, brazil. a total of 162 birds from 26 species were captured. one adult tick, 296 larvae and 67 nymphs were found on passerine birds. of these, it was identified 31 larvae and 27 nymphs of amblyomma longirostre, 17 nymphs of a. nodosum, one a. cajennense lar ... | 2010 | 21184702 |
| detection of theileria and babesia in brown brocket deer (mazama gouazoubira) and marsh deer (blastocerus dichotomus) in the state of minas gerais, brazil. | intraerythrocytic protozoan species of the genera theileria and babesia are known to infect both wild and domestic animals, and both are transmitted by hard-ticks of the family ixodidae. the prevalences of hemoprotozoa and ectoparasites in 15 free-living mazama gouazoubira, two captive m. gouazoubira and four captive blastocerus dichotomus from the state of minas gerais, brazil, have been determined through the examination of blood smears and the use of nested polymerase chain reaction (npcr). t ... | 2010 | 21354704 |
| rickettsia species infecting amblyomma ticks from an area endemic for brazilian spotted fever in brazil. | this study reports rickettsial infection in amblyomma cajennense and amblyomma dubitatum ticks collected in an area of the state of minas gerais, brazil, where brazilian spotted fever is considered endemic. for this purpose, 400 adults of a. cajenennse and 200 adults of a. dubitatum, plus 2,000 larvae and 2,000 nymphs of amblyomma spp. were collected from horses and from the vegetation. the ticks were tested for rickettsial infection through polymerase chain reaction (pcr) protocols targeting po ... | 2011 | 22166385 |