[case of mass infestation with mites of genus rhipicephalus sanguineus (latreile, 1806) in a warsaw apartment]. 1979516736
ehrlichiosis in wolves, dogs, and wolf-dog crosses.canine ehrlichiosis was diagnosed in wolves, dogs, and wolf-dog crosses at a small zoo in northcentral florida. five of 9 adult canids and all 8 pups confined to a common kennel died as a result of the infection. the epizootic was associated with a massive rhipicephalus sanguineus infestation. hematologic and pathologic findings in an adult wolf-dog cross that died were characteristic of canine ehrlichiosis. that animal and four other canids were seropositive for ehrlichia canis. no deaths occur ...1979521367
hosts of rhipicephalus sanguineus (acari: ixodidae) in northern mississippi, usa. 1979529267
[control of the brown dog tick rhipicephalus sanguineus l. in houses and stables]. 1979548028
rhipicephalus sanguineus: vector of a new spotted fever group rickettsia in the united states.a rickettsia related to but distinct from the spotted fever agent, rickettsia rickettsii, has been detected in 167 (18.9%) of 884 rhipicephalus sanguineus taken off dogs in central and northern mississippi. the organisms could readily be isolated in male meadow voles (microtus pennsylvanicus), where it produced massive infections in the tissues of tunica vaginalis. it was practically nonpathogenic for male guinea pigs, although inoculation of these animals with infected tunica vaginalis of voles ...1975806533
rocky mountain spotted fever (tick-borne typhus) in south carolina: an educational program and tick/rickettsial survey in 1973 and 1974.because the incidence of spotted fever is increasing in south carolina, campaigns were carried out in 1973 and 1974 to provide the public and medical practitioners, through pamphlets and news media, with information about spotted fever and the ticks which transmit the causative agent, rickettsia rickettsii. people were also invited to save and submit live ticks removed from vegetation, animals and humans, for examination by the hemolymph test. a total of 1,186 ticks consisting of 987 dermacentor ...1975811127
letter: the brown dog tick (rhipicephalus sanguineus) on an imported dog. 19751060961
the control of ticks, fleas and lice on dogs by means of a sendran--impregnated collar.plastic collars impregnated with 9,4% sendran effectively controlled adult rhipicephalus sanguineus for a period of 49 days and immature ticks for a period possibly in excess of 70 days when fitted to four dogs. four uncollared dogs served as controls. although flea burdens were extremely low the collars were apparently effective for a period in excess of 70 days. a medicated collar killed all the ticks, fleas and lice on a severely parasited dog within a period of 48 hours.19761263190
tick (acari: ixodidae) attachment cement and salivary gland cells contain similar immunoreactive polypeptides.a specific antiserum (12c) raised to a 90-kda immunogenic component of salivary glands of the tick rhipicephalus appendiculatus recognized similar 90-kda polypeptides from salivary glands of the american dog tick, dermacentor variabilis, and the lone star tick, amblyomma americanum, as well as 70-kda polypeptides in the cement of d. variabilis, a. americanum, and r. sanguineus (brown dog tick). the reduction in size of the polypeptide for these ticks suggests that it is modified in some way duri ...19921495047
isolation by a sensitive centrifugation cell culture system of 52 strains of spotted fever group rickettsiae from ticks collected in france.boutonneuse fever caused by rickettsia conorii is transmitted mainly by the brown dog tick, rhipicephalus sanguineus. we collected 540 ticks in marseille, france, and tried to isolate as many strains of rickettsia as possible. ticks were evaluated for the presence of rickettsia by the hemolymph test and by a new culture system, the centrifugation-shell vial technique. we avoided contamination in the culture system. prior to ticks being submitted to the hemolymph test, they were disinfected. only ...19901696286
evaluation of rhipicephalus sanguineus as a potential biologic vector of ehrlichia platys.the brown dog tick, rhipicephalus sanguineus (acari: ixodidae), transmits several diseases among dogs including ehrlichia canis infection. the role of rhipicephalus sanguineus as a biologic vector for e platys, the rickettsial agent of infectious canine cyclic thrombocytopenia, was studied in dogs. laboratory-cultured, pathogen-free nymph ticks were fed to repletion on dogs acutely infected with e platys. tick engorgement coincided with the development of initial parasitemia and thrombocytopenia ...19911952347
tick information sheet. the brown dog tick. rhipicephalus sanguineus. 19912014631
[babesiosis of dogs in germany: epidemiologic case analysis].between january 1987 and february 1990 babesia infections were detected in 320 dogs in germany by means of microscopical and/or serological methods. it was found, that 316 dogs were infected with babesia canis and 4 animals with babesia gibsoni. of the babesia-canis-positive dogs 184 were abroad up to 4 months before diagnosis, mainly in france, spain and italy, but also in hungary, greece, jugoslavia, portugal, morocco, togo, pakistan, sri lanka, malaysia, turkey, romania, austria and the nethe ...19912068714
problems of housing and health of people utilizing the garbage in cairo from the viewpoint of medical entomology.more than 50 arthropod species were found at two dumping-grounds with dwelling-places (mokattam and ezbet el nakhl) in cairo. their importance was evaluated from the epidemiological and epizootological points of view. of primary importance is the great prevalence of the fleas (xenopsylla cheopis) on brown rats (rattus norvegicus), since the rats are in a close contact with people. they are often simultaneously parasitized with another flea species, ctenocephalides felis felis, which is very freq ...19892634080
introduction of the tick rhipicephalus sanguineus to czechoslovakia: an additional case. 19892767559
[new procedures for the elimination of the brown dog tick (rhipicephalus sanguineus l.) without contaminating room air]. 19863536413
[epizootics due to rhipicephalus sanguineus (latreille 1806) in germany]. 19734751659
tick repellents ii: n-substituted azacyclopentanones and azacyclopentenones.several n-substituted azacyclopentanones and azacyclopentenones were synthesized and evaluated as repellents for the brown dog tick rhipicephalus sanguineus. several of these compounds were more effective in our test system than were the standard repellents, n,n-diethyl-m-toluamide and butopyranoxyl.19836644605
susceptibility of indian dog tick rhipicephalus sanguineus (latreille) to insecticides. 19836674328
[characteristics of the "tache noire" of boutonneuse fever].humans show little sensitivity to the bites of healthy rhipicephalus sanguineus and the skin lesion is extremely slight. the "tache noire" - innoculation eschar - corresponding to the infecting bite of the tick with r. conori is discussed and histopathological findings reported. the patient is frequently unaware of the eschar on his body and elements relating to the duration of the infecting bite are deduced. apart from its typical features, the tache noire may be very small, with surrounding hy ...19817254648
[the brown dog tick rhipicephalus sanguineus latreille 1806 in the netherlands, an analysis of imported cases, including their veterinary and medical significance (author's transl)].eighteen cases of infestation with rhipicephalus sanguineus were reported during the past five years. of the cases, six were observed during the first seven months of 1979. of all infestations, four originated from sources within the territory of the netherlands. several cases of infestation with canine babesiosis were reported. there could have been a relationship between some of these cases and infestation with r. sanguineus. populations of this tick can survive and develop in dutch homes. for ...19807368198
cholesteryl esters on the body surfaces of the camel tick, hyalomma dromedarii (koch, 1844) and the brown dog tick, rhipicephalus sanguineus (latreille, 1806).cholesteryl esters were found to constitute a major component of the lipids coating the body cuticle of females of the camel tick, hyalomma dromedarii and the brown dog tick, rhipicephalus sanguineus. one or more cholesteryl esters, alone or in combination, have been shown to serve as the mounting sex pheromone of several species of ixodid ticks. consequently, knowledge of these compounds is important for an understanding of the mating behavior of these ticks. based on thin layer chromatography, ...19947628247
stage-specific development of a filarial nematode (dipetalonema dracunculoides) in vector ticks.this paper reports the development of the canid filarial worm, dipetalonema dracunculoides, in the brown dog tick, rhipicephalus sanguineus by determining whether development is similar within larval, nymphal and adult stages of infected ticks. this study demonstrates that only infected nymphal ticks can support the complete development of the filarial worm. infected larval ticks are not suitable intermediate hosts, nor are infected adults. development depends on some stage-specific property of ...19947829843
seasonal occurrence of rhipicephalus sanguineus in okayama prefecture, japan and effect of temperature on development of the tick.the seasonal occurrence of rhipicephalus sanguineus on dogs was examined at a kennel in okayama prefecture, japan. the number of ticks suddenly decreased after treatment with an acaricide in late august. small numbers of adults and nymphs were detected in september and october, then ticks were not seen on the dogs early in november, when the mean temperature was below 15 degrees c. then 3 dogs were found to be infested by some adult ticks toward the end of march, when the mean temperature was ab ...19968777229
phenotypic and genotypic characterization of spotted fever group rickettsiae isolated from catalan rhipicephalus sanguineus ticks.eighty-nine rhipicephalus sanguineus ticks and 21 rhipicephalus bursa ticks collected in catalonia were tested by the hemolymph test to establish their infection rate with spotted fever group rickettsiae. by giménez staining, 11.2% of the r. sanguineus isolates and 0% of the r. bursa isolates were found to contain rickettsia-like organisms. six spotted fever group rickettsial strains (bar29, bar31, gir4, tar1, tar2, and tar3) were isolated from these ticks and were characterized by phenotypic an ...19968897166
immunisation of dogs and guinea pigs against rhipicephalus sanguineus ticks using gut extract.tick-bite naive guinea pigs were inoculated three times with rhipicephalus sanguineus gut or salivary gland extracts and saponin as adjuvant. dogs were inoculated three times with gut extract only as this fraction induced a more efficient resistance in guinea pigs (lower tick recovery and lower engorged female weights). freund's adjuvant and saponin were used as adjuvants for the immunisation of dogs. freund's adjuvant was used to enhance cellular immunity. the highest level of resistance in dog ...19979066073
effect of infestation with rhipicephalus sanguineus on the antibody productivity in dogs. 19979226654
distribution of borrelia burgdorferi s.l. spirochaete dna in british ticks (argasidae and ixodidae) since the 19th century, assessed by pcr.the distribution of borrelia burgdorferi sensu lato, the lyme borreliosis agent, was surveyed in british ticks in the collection of the natural history museum, london. alcohol-preserved specimens of eight species of ticks known to attack humans were studied: ixodes ricinus, i. hexagonus, i. uriae, i. trianguliceps, dermacentor reticulatus, haemaphysalis punctata, rhipicephalus sanguineus and argas vespertilionis. the sample comprised all life stages and originated from a wide range of host speci ...19989513944
saliva of rhipicephalus sanguineus tick impairs t cell proliferation and ifn-gamma-induced macrophage microbicidal this study, we investigated tick saliva effects on t cell proliferation, antigen presentation and ifn-gamma-induced macrophage activation, events which are associated with host immune defense mechanisms. mice repeatedly infested with rhipicephalus sanguineus ticks, similarly to dogs, did not develop resistance to further infestations. we determined that r. sanguineus tick saliva inhibited, in a dose-dependent manner, both con-a and specific antigen-induced splenic t cell proliferation. tick s ...19989730222
seasonal distribution of rhipicephalus sanguineus ticks (acari: ixodidae) on dogs in an urban area of morelos, mexico.between 1993 and 1995, we examined 1742 dogs at two veterinary clinics in cuernavaca city in mexico for the presence of rhipicephalus sanguineus ticks. the overall tick infestation prevalence was 20% and there were no significant differences (p > 0.05) between different years. the prevalence was somewhat higher in spring, summer and autumn (20% or more) than in winter (13.7%). a positive correlation (p < 0.01) was found between prevalence of ticks and rainfall in spring, summer and autumn, where ...199910356770
sequential histopathology at the rhipicephalus sanguineus tick feeding site on dogs and guinea pigs.the tick rhipicephalus sanguineus is a very common parasite of dogs worldwide. dogs seem unable to acquire resistance against this tick species, whereas guinea pigs demonstrate a very strong resistance following primary infestation. we studied the inflammatory reaction at the r. sanguineus tick feeding site on dogs and guinea pigs during primary and tertiary infestations at different time intervals after attachment. biopsies were collected after 4, 24, 48 and 96 hours. changes that were found in ...199910668866
efficacy of selamectin against experimentally induced tick (rhipicephalus sanguineus and dermacentor variabilis) infestations on controlled studies were conducted to investigate the efficacy of selamectin against weekly infestations of dogs with rhipicephalus sanguineus and dermacentor variabilis. treatments (selamectin or vehicle alone) were applied topically at weekly, 2-week, or monthly intervals or in a "monthly plus" regimen (monthly treatment with an additional treatment at 14 days after the first treatment). selamectin was supplied in unit dose tubes designed to deliver a minimum dosage of 6mgkg(-1). the stud ...200010940535
hepatozoon canis infection associated with dog ticks of rural areas of rio de janeiro state, brazil.hepatozoon canis is a tick-borne protozoan that infects dogs and has been reported throughout the world. manifestation of h. canis infection varies from being sub-clinical in apparently healthy dogs to severe illness. the main vector of the infection is the dog tick, rhipicephalus sanguineus although other species may also transmit this agent. h. canis has been reported previously in brazil, but mostly as an occasional finding during laboratory exams and always associated with other diseases. th ...200111113545
prevalence of vectors of the spotted fever group rickettsiae and murine typhus in a bedouin town in israel.a survey of the vectors of spotted fever group rickettsiae and of murine typhus was carried out in rahat, a bedouin town in the negev desert, where the diseases are endemic. houses with known cases of spotted fever group rickettsiae or murine typhus were compared with those without reported clinical cases. a neighboring jewish community, lehavim, where no cases of spotted fever group rickettsiae and murine typhus were reported in recent years, was used as a control. in the houses of patients wit ...200111372975
[toxic effects and in vitro inefficacy of deltamethrin on larvae of rhipicephalus sanguineus from goiânia, goiás, brazil].it has been observed that formulations of deltamethrin developed for disinsectization of infested places and control of parasitic arthropods of bovines and equines have frequently been used by breeders of dogs to control ticks in their animals and kennels, but without due consideration of the correct dosage or means of application. with the purpose of evaluating the efficacy of this product on rhipicephalus sanguineus, bioassays were realized with larvae at 27+/-1 degrees c, ur>80% and light per ...200111391437
analysis of the use of fenthion via epicutaneous in dogs for rhipicephalus sanguineus control.the action of fenthion was studied in a 15% epicutaneous formulation upon rhipicephalus sanguineus, which may transmit pathogens to men and other animals, such as ehrlichia, babesia and ricketsia. dogs were artificially infected for the trial. the fenthion bioassays were begun four months after artificial infestation. the test group, having a mean of 186 ticks per dog, received the formulation dosage according to body weight on the neck region. tick counts were performed, considering diameters > ...200111562726
importation of the brown dog or kennel tick (rhipicephalus sanguineus) into the uk. 200211878449
[complications of mediterranean spotted fever].mediterranean spotted fever is an infectious disease due to rickettsia conori transmitted to man by the dog tick rhipicephalus sanguineus. the review of a consecutive series of 525 cases, admitted to caltagirone hospital in the last 20 years, permits the classic clinical picture to be identified by fever, maculopapular eruption and tache noire, and any complications to be visualized. usually the course of the disease is good, but 12.7% of our cases reported complications such as renal failure, m ...200112087217
the dog factor in brown dog tick rhipicephalus sanguineus (acari: ixodidae) infestations in and near human dwellings.three cases of the tick rhipicephalus sanguineus infiltration in or near human dwellings caused by dogs, and their influence on epidemiological features of human habitats have been investigated. (a) the observation of dogs kept indoors proved that single tick females could engorge and oviposit inside apartments followed by the development of subadults. (b) abundant micropopulations of ticks were formed in small yards or gardens near the dwellings where dogs lived in kennels. (c) a huge field pop ...200212141741
transmission of hepatozoon americanum (apicomplexa: adeleorina) by ixodids (acari: ixodidae).american canine hepatozoonosis (ach) caused by hepatozoon americanum vincent-johnson, macintire, lindsay, lenz, baneth, and shkap is an emerging, often fatal, tick-borne protozoal disease of dogs in the united states of america. dogs acquire infection by ingesting ticks that contain oocysts. to understand the invertebrate (definitive) host range of h. americanum, experiments were carried out using four ixodids, rhipicephalus sanguineus (latreille), dermacentor variabilis say, amblyomma americanu ...200212144294
gynandromorphism in amblyomma cajennense and rhipicephalus sanguineus (acari: ixodidae).during a survey of ticks on horses in november 2000, at the university of são paulo farm in pirassununga county, são paulo, brazil, 1 gynandromorph of amblyomma cajennense was collected from a naturally infested horse. in another survey on dogs in march 2001, in the urban area of monte negro, rondônia, brazil, a gynandromorph of rhipicephalus sanguineus was collected from a naturally infested dog. both specimens are described and classified as perfect bipartite protogynanders.200212197141
development of resistance to nymphs of amblyomma cajennense ticks (acari:ixodidae) in dogs.ticks have long been regarded as constraints to humans and domestic animals, but hosts often develop resistance to ticks after repeated infestations. the purpose of this investigation was to study the possible acquisition of immunity in domestic dogs to nymphs of a. cajennense by determining the tick alimentary performance after successive controlled infestations. mean engorged weight of nymphs was not significantly different among the three infestations; molting rate from nymph to adult ticks, ...200212381587
efficacy of three dose volumes of topically applied 65% permethrin against ctenocephalides felis and rhipicephalus sanguineus on dogs weighing 30 kg or more.twenty-five dogs were evenly and randomly allocated by weight to five treatment groups: untreated control, 2 ml 65% permethrin (dogs weighing 15 to 29 kg, "average dogs"), and 2, 3, or 4 ml 65% permethrin (dogs weighing > or = 30 kg, "big dogs"). each dog was infested with 125 unfed, adult cat fleas, ctenocephalides felis, and 50 unfed, adult brown dog ticks, rhipicephalus sanguineus, on days -3 (ticks only), -2 (fleas only), 3, 7, 14, 17, 21, 24, and 28. fleas and ticks were counted 1 and 3 or ...200212584681
identification of ctenocephalides felis fleas as a host of rickettsia felis, the agent of a spotted fever rickettsiosis in yucatań, search for the vector of the recently recognized spotted fever rickettsiosis of the yucatán, ticks, fleas, and lice were collected from vegetation and dogs in localities where seropositive persons had been found. the arthropods were examined by polymerase chain reaction (pcr) using primers for the genus-specific 17-kda protein gene followed by restriction fragment length polymorphism (rflp) and dna sequencing. eleven (20%) of 54 pools of ctenocephalides felis fleas contained dna of rickettsia ...200212653300
tick infestation of dogs in thessaloniki, northern greece.ticks were collected from 249 dogs, admitted over a one-year period (1996-1997) to a veterinary teaching hospital and four private veterinary practices located in the county of thessaloniki, greece. a total of 2812 ticks (acari: ixodidae) were collected, of which 2511 (89.3%) were rhipicephalus sanguineus (latreille) adults (1070 males, 1441 females), 156 (5.5%) r. turanicus pomerantsev adults (35 males, 121 females), 100 (3.6%) rhipicephalus spp. nymphs and 45 (1.6%) rhipicephalus spp. larvae. ...200312680933
two species of canine babesia in australia: detection and characterization by pcr.the haemoprotozoan babesia canis has been recognized in australia for many years, and a second, smaller species has recently been discovered. amplification and sequencing of a partial region of the 18s small subunit ribosomal rna (rrna) gene enabled detection and characterization of the large and small canine babesiae of australia for the first time. isolates from northern australia were genetically characterized to be 99% homologous to babesia canis vogeli, confirming previous speculation about ...200312760669
antibody and blood leukocyte response in rhipicephalus sanguineus (latreille, 1806) tick-infested dogs and guinea pigs.the dog is considered to be the natural host of rhipicephalus sanguineus and is unable to develop appreciable resistance even after repeated feedings. the guinea pig develops strong resistance after one infestation with adult ticks. antibody (igg) titres against tick salivary gland antigens (sgas) and blood leukocyte numbers in dogs and guinea pigs undergoing experimental r. sanguineus tick infestations were measured to detect a possible correlation with susceptibility or resistance of hosts. si ...200312860067
detection of astrakhan fever rickettsia from ticks in kosovo.astrakhan fever is a summer spotted fever resembling mediterranean spotted fever, endemic in astrakhan, a region of russia located by the caspian sea. its agent is a spotted fever group rickettsia, member of the rickettsia conorii complex, transmitted to humans by rhipicephalus sanguineus and rhipicephalus pumilio ticks. in summer 2001, french united nations troops in kosovo collected 2 ticks on asymptomatic soldiers (1 r. sanguineus and 1 hyalomma marginatum) and 10 ticks on dogs (7 r. sanguine ...200312860620
ixodid ticks on domestic animals in samut prakan province, thailand.the prevalence of tick-harboring domestic animals, tick density, and the species of ticks were studied throughout the year 2000, in muang samut prakan, bang phli and phra pradaeng districts of samut prakan province. the animals examined were canis lupus familiaris (450), bos indicus (cross-bred) (189), bos taurus (30), bubalus bubalis (171) and sus scrofa domestica (450). the total number of collected ticks was 1,491. the pigs did not harbor ticks. the stages of ticks collected were larvae, nymp ...200212971472
the isolation of coxiella burnetii from rhipicephalus sanguineus on naturally infected dogs. 195313022569
brown dog tick. 195813522465
the use of a 4% (w/w) deltamethrin collar (scalibor protectorband) in the extended control of ticks on dogs.deltamethrin (4%, w/w) formulated in a polymer matrix system (scalibor protectorband, intervet international bv) was evaluated for the prevention of ticks on dogs. controlled laboratory trials were conducted, wherein dogs wearing anti-tick collars were compared with control dogs and artificially infested by adult ixodes ricinus and/or rhipicephalus sanguineus ticks. the activity of the collars increased from 24 to 48 h post-treatment (pt) wherein tick numbers were reduced to 78.7% for i. ricinus ...200214570144
parasites of domestic and wild animals in south africa. xliii. ixodid ticks of domestic dogs and cats in the western cape province.ticks were collected at monthly intervals for 16 consecutive months from individual dogs by their owners in or close to the town of stellenbosch, western cape province. they were also collected for 27 consecutive months from dogs presented for a variety of reasons at three veterinary clinics in stellenbosch, and from dogs upon admission to an animal welfare shelter. at one of the veterinary clinics ticks were also collected from cats. dog owners collected six ixodid species from their pets and t ...200314621314
canine ehrlichiosis.ehrlichia spp. are obligate intracellular bacteria with tropism for hematopoietic cells. monocytic ehrlichioses in dogs and humans are transmitted by ticks and primarily caused by e. canis and e. chaffeensis, respectively. e. canis causes canine monocytic ehrlichioses (cme), a potentially fatal disease in dogs that requires rapid and accurate diagnosis in order to initiate appropriate therapy leading to a favorable prognosis. cme is characterized by three stages; 1) acute, 2) subclinical and 3) ...200314677903
cloning and sequencing of putative calreticulin complementary dnas from four hard tick species.calreticulin (crt) is a calcium-binding protein and has many functions in eukaryotic cells. crt is possibly involved in parasite host immune system evasion. to better understand the molecular basis of crt in ticks, we cloned and sequenced 4 full-length complementary dnas (cdnas) from the hard tick species, dermacentor variabilis, haemaphysalis longicornis, ixodes scapularis, and rhipicephalus sanguineus, using the technique of rapid amplification of cdna ends. the deduced amino acid sequences sh ...200415040669
efficacy of a collar impregnated with amitraz and pyriproxyfen for prevention of experimental tick infestations by rhipicephalus sanguineus, ixodes ricinus, and ixodes scapularis in compare the efficacy of collars impregnated with 9% amitraz or 9% amitraz and 0.5% pyriproxyfen (ppf) for control of newly established tick infestations by rhipicephalus sanguineus, ixodes ricinus, and ixodes scapularis in dogs and determine whether egg production by surviving female ticks was decreased.200515706971
ixodid ticks on dogs in southern mozambique.the objective of this study was to determine the species and distribution of ticks infesting domestic dogs in southern mozambique. to this end 89 collections were taken from dogs and the geographic coordinates of the localities at which they were made noted. fifty-eight of these collections were from animals in the city of maputo and 16 from animals at rural settlements close to maputo. a further 15 collections were made from dogs in rural environments north of maputo. ten ixodid tick species, o ...200415732454
efficacy of a combination of imidacloprid 10%/permethrin 50% versus fipronil 10%/(s)-methoprene 12%, against ticks in naturally infected dogs.preventing tick bites is a fundamental step towards reducing the impact of tick-borne protozoal, bacterial and viral diseases (tbds) in humans and animals. the aim of this study was to evaluate the efficacy of a combination of imidacloprid 10%/permethrin 50% and of fipronil 10%/s-methoprene 12% against ticks in naturally infected dogs and to assess methodological parameters to calculate drug efficacy on tick immature stages. from july to august 2004, 45 privately owned dogs of various sexes, age ...200515893431
interception of the brown dog tick, rhipicephalus sanguineus, infesting man. 198616031283
histopathology of tick-bite lesions in naturally infested capybaras (hydrochoerus hydrochaeris) in the present work features of tick-bite lesions were evaluated in capybaras naturally infested with amblyomma cajennense and amblyomma dubitatum ticks. gross appearance of tick bite site was characterized by a mild swelling and erythema. microscopic examination revealed the cement cone, a tube-like homogenous eosinophilic mass penetrating deep into the dermis. this structure was surrounded in the dermis by a cellular infiltrate and free eosinophilic granules and was associated to edema of vari ...200516323054
new diseases and increased risk of diseases in companion animals and horses due to transport.dogs and horses are transported within the european union for a number of reasons. the transport per se may cause physical problems, exemplified by hyperthermia in dogs and pleuropneumonia in horses, and the stress may reactivate latent infections such as canine herpesvirus-1 and equine herpesvirus-1. preventive treatments are vital to protect dogs from ticks and mosquitoes transmitting their potentially lethal infectious agents, such as leishmania donovani infantum, babesia canis, ehrlichia can ...200316429803
a study of ectoparasites of canis lupus familiaris in mueang district, khon kaen, thailand.we studied ectoparasites found on canis lupus familiaris sampled in five areas in mueang district, khon kaen province, thailand. the prevalence of fleas and ticks as well as their density were determined in 100 dogs that did not receive treatments. a total number of 458 ectoparasites was found corresponding to two species: 25.8% ctenocephalides canis and 74.2% rhipicephalus sanguineus. r. sanguineus was the most abundant species, and ct. canis was the only flea species found. the stages of r. sa ...200516438201
canine babesiosis in france.canine babesiosis has a high prevalence in france and continues to constitute a diagnostic challenge. this paper presents essential data derived from epidemiological surveys in order to define the main features of this disease. atypical forms are frequent, the diagnosis must be confirmed by blood smears and treatment is based on the use of imidocarb. prophylaxis currently remains insufficient.200616507334
[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. ...200616583093
isolation and identification of rickettsia massiliae from rhipicephalus sanguineus ticks collected in arizona.twenty rhipicephalus sanguineus ticks collected in eastern arizona were tested by pcr assay to establish their infection rate with spotted fever group rickettsiae. with a nested pcr assay which detects a fragment of the rickettsia genus-specific 17-kda antigen gene (htra), five ticks (25%) were found to contain rickettsial dna. one rickettsial isolate was obtained from these ticks by inoculating a suspension of a triturated tick into monolayers of vero e6 monkey kidney cells and xtc-2 clawed toa ...200616885311
an outbreak of rocky mountain spotted fever associated with a novel tick vector, rhipicephalus sanguineus, in arizona, 2004: preliminary report.this study describes preliminary results of an investigation of rmsf in arizona associated with the brown dog tick, rhipicephalus sanguineus. high numbers of dogs and heavy infestations of ticks created a situation leading to human disease.200617114736
an investigation into the distribution, host-preference and population density of ixodid ticks affecting domestic animals in study the distribution, host-preference and population density of ixodid ticks in bangladesh, an attempt was made to collect adult ticks from various host animals in three distinct topographic zones, viz. flood plains, hills and steppe 'barind'. five species of ixodid ticks were recorded, namely, boophilus microplus (56.3%), haemaphysalis bispinosa (11.3%), rhipicephalus sanguineus (14.7%), hyalomma anatolicum anatolicum (15.0%) and amblyomma testudinarium (2.8%). the data showed that b. micr ...200617243476
hepatozoon canis infection in slovakia: imported or autochthonous?tissue samples from nine red foxes (four samples of striated muscle tissue and five samples of heart tissue) that originated from the michalovce district (slovakia), an area with endemic occurrence of canine babesiosis were examined by pcr method using primers amplifying a fragment of the 18s rrna spanning the v4 region of babesia and theileria. an unexpected determination of 450 bp dna fragment of hepatozoon canis was found in four samples. partial sequences of the 18s rrna gene from the h. can ...200717627439
real-time pcr-based prevalence study, infection follow-up and molecular characterization of canine hemotropic mycoplasmas.hemotropic mycoplasmas (hemoplasmas) have been reported in several mammalian species including dogs. infections may lead to hemolytic anemia, but investigations in the dog had been hampered by the lack of adequate diagnostic methods. only recently sensitive pcr-based assays were reported for the two canine hemoplasmas, mycoplasma haemocanis and candidatus mycoplasma haematoparvum. by applying these assays, 15.4% of 460 dogs from the south of france tested hemoplasma positive. it was hypothesized ...200817656047
confirmation of the efficacy of a novel formulation of metaflumizone plus amitraz for the treatment and control of fleas and ticks on dogs.a novel spot-on formulation containing metaflumizone plus amitraz (promeris/promeris duo for dogs, fort dodge animal health, overland park, ks) was evaluated in four laboratory studies to confirm efficacy against fleas and ticks on dogs for 1 month. three different strains of cat flea (ctenocephalides felis felis) and four tick species were used. rhipicephalus sanguineus and dermacentor variabilis were evaluated concurrently in two studies and ixodes scapularis and amblyomma americanum in one st ...200717923330
dose determination of a novel formulation of metaflumizone plus amitraz for control of cat fleas (ctenocephalides felis felis) and brown dog ticks (rhipicephalus sanguineus) on dogs.a novel spot-on formulation containing metaflumizone and amitraz (promeris/promeris duo for dogs, fort dodge animal health, overland park, ks) was evaluated in a laboratory study to determine the appropriate dose for efficacy against fleas and ticks on dogs for 1 month. thirty-six beagles were randomly allocated to six equal groups and individually housed. one group remained nontreated. another was treated with a placebo formulation (solvents with no active ingredients). three groups of dogs wer ...200717931781
the effect of water and shampooing on the efficacy of a pyriprole 12.5% topical solution against brown dog tick (rhipicephalus sanguineus) and cat flea (ctenocephalides felis) infestations on dogs.the efficacy of a single treatment with a 12.5% pyriprole spot-on formulation against induced infestations with r. sanguineus ticks and cat fleas (c. felis) as well as its persistence after repeated washing and shampooing was investigated in four separate studies. in a first study on r. sanguineus involving 32 beagle dogs, the efficacy at various time-points during the 30 days that followed treatment assessed 48 h after re-infestation ranged from 100% to 99.3%. no engorged ticks, alive or dead, ...200818061355
rickettsia infection in five areas of the state of são paulo, brazil.this study investigated rickettsial infection in animals, humans, ticks, and fleas collected in five areas of the state of são paulo. eight flea species (adoratopsylla antiquorum antiquorum, ctenocephalides felis felis, polygenis atopus, polygenis rimatus, polygenis roberti roberti, polygenis tripus, rhopalopsyllus lugubris, and rhopalopsyllus lutzi lutzi), and five tick species (amblyomma aureolatum, amblyomma cajennense, amblyomma dubitatum, ixodes loricatus, and rhipicephalus sanguineus) were ...200718094887
molecular and parasitological survey of hepatozoon canis (apicomplexa: hepatozoidae) in dogs from rural area of sao paulo state, brazil.hepatozoon canis is a protozoan that infects dogs and is transmitted by the ingestion of the brown dog tick, rhipicephalus sanguineus. two distinct species of hepatozoon genus can infect dogs, h. canis and h. americanum. routine tests to detect the disease are based on direct examination of gametocytes on giemsa-stained blood smears. the objectives of this study were the investigation of infection prevalence in rural area dogs, the comparison of diagnostics by blood smear examination and polymer ...200818188597
molecular survey of rickettsia spp. in sick dogs in italy.the aim of this retrospective study was to investigate the prevalence of rickettsia spp. dna in the blood of sick dogs from italy. canine blood samples (n=650) submitted for molecular testing of rickettsia spp. to a diagnostic laboratory from february 2003 to march 2006 were studied. the rickettsia spp. dna detection was performed by light cycler real-time pcr using hybridization probes separately conducted with specific primers and probes. the total percentage of rickettsia spp.-positive dog sa ...200818631232
new epidemiological data on brazilian spotted fever in an endemic area of the state of são paulo, brazil.the present work evaluated rickettsial infection in dogs and their ticks in an area endemic for brazilian spotted fever (bsf) in the metropolitan area of são paulo, brazil, where the tick amblyomma aureolatum was presumed to be the vector of the disease. ticks were collected on dogs from 185 houses, encompassing single infestations by rhipicephalus sanguineus, amblyomma aureolatum, amblyomma longirostre, or amblyomma sp. in dogs from 60 (32.4%), 77 (41.6%), 2 (1.1%), and 25 (13.5%) houses, respe ...200818847319
external and intestinal parasites of pet dogs with reference to zoonotic toxocariasis.examination of 3000 pet dogs over two years at the veterinary teaching hospital, faculty of veterinary medicine revealed external and internal parasites. the external parasites were rhipicephalus sanguineus, ctenocephalus felis, sarcoptes canis, and sarcoptes scabiei. the internal parasites were echinococcus granulosus, dipylidium caninum, rare heterophyes heterophyes, and toxocara canis. toxocara eggs were detected in 9.83%. the results were discussed with reference to zoonotic toxocariasis.200919530631
deciphering the relationships between rickettsia conorii conorii and rhipicephalus sanguineus in the ecology and epidemiology of mediterranean spotted fever.mediterranean spotted fever is the most important tick-borne disease occurring in southern europe and north africa. the first case of this life-threatening zoonosis was reported in 1910. in the 1930s, the role of the brown dog tick, rhipicephalus sanguineus, and the causative agent, rickettsia conorii were described. however, basic questions regarding the relationships between the rickettsia and its tick vector are still unresolved, and the life cycle of r. conorii is incompletely known. there i ...200919538263
ectoparasites of dogs and cats in hundred eighty-one dogs and 26 short-hair cats from suburban areas around tirana, albania were examined for ectoparasite infestation. the dogs were examined on several occasions from 2005 through 2009 representing three seasons: winter (december-february), spring (march-may), and summer (june-august); the cats were examined in late autumn (november). in addition, deep ear swab specimens of 30 dogs were examined for ear mites. the arthropod ectoparasite fauna of the dogs included two tick spe ...200919690887
ectoparasite infestation on rural dogs in the municipality of são vicente férrer, pernambuco, northeastern brazil.this article presents the results of a study on ectoparasites infesting rural dogs in pernambuco, northeastern brazil. forty-one dogs from a rural community of pernambuco were examined and 70.7% were infested by ectoparasites. the prevalence rates of infestation by ticks, fleas, and lice were 58.5, 43.9 and 22%, respectively. of 24 dogs parasitized by ticks, 15 were exclusively infested by rhipicephalus sanguineus (latreille) (32 females, 66 males, 9 nymphs; prevalence, 48.8%; mean intensity, 5. ...200919772781
discovery of ectoparasiticidal hydrazonotrifluoromethanesulfonanilides.a series of hydrazonotrifluorosulfonanilide derivatives were synthesized and evaluated for in vitro activity against the ectoparasites ctenocephalides felis and rhipicephalus sanguineus. some compounds with excellent activity against tick were identified.201019962303
molecular and clinical evidence of ehrlichia chaffeensis infection in cameroonian patients with undifferentiated febrile the u.s.a., human monocytotropic ehrlichiosis (hme) caused by ehrlichia chaffeensis is an emerging tick-transmitted zoonosis. in cameroon, where e. canis, e. chaffeensis and e. ewingii have recently been detected in dogs and/or ticks (rhipicephalus sanguineus), the potential exists for human infections. patients from the coastal region of cameroon who had acute fevers of unknown aetiology were therefore checked for ehrlichial infection, using a real-time pcr that amplifies part of a genus-spe ...200920030996
evidence of exposure to spotted fever group rickettsiae among arizona dogs outside a previously documented outbreak area.since 2003, two communities in eastern arizona have experienced a sustained outbreak of rocky mountain spotted fever (rmsf), caused by rickettsia rickettsii, associated with transmission by rhipicephalus sanguineus, the brown dog tick; 70 human cases, including eight deaths, were reported from these communities during 2003 through 2008. in both of the affected communities, antibodies to spotted fever group rickettsiae (sfgr) were present in dogs before the notice of the first human cases, sugges ...201120042069
efficacy of the fipronil 10%+(s)-methoprene 9% combination against rhipicephalus sanguineus in naturally infested dogs: speed of kill, persistent efficacy on immature and adult stages and effect of water.this field trial was designed to test the efficacy, in terms of treatment and prevention, of the fipronil 10%+(s)-methoprene 9% combination against immature and adult stages of rhipicephalus sanguineus in naturally infested dogs, and to assess the effect of a single plain water exposure. twenty-four dogs of various age, sex, weight and coat length were divided into two homogeneous groups, treated (t) and control (c), and housed into twin outdoor kennels. trial baseline was designed as day 0, whe ...201020185241
co-feeding as a route for transmission of rickettsia conorii israelensis between rhipicephalus sanguineus ticks.rickettsia conorii is widely distributed in europe, asia, and africa. the brown dog tick, rhipicephalus sanguineus, is the recognized vector of r. conorii. in this study, we assessed the efficiency of r. conorii israelensis transmission between co-feeding rh. sanguineus ticks. infected rh. sanguineus adults and uninfected nymphs were fed simultaneously upon either naïve dogs or a dog previously exposed to this agent. when ticks were placed upon naïve dogs, 92-100% of nymphs acquired the infectio ...201020589416
rhipicephalus sanguineus on dogs: relationships between attachment sites and tick developmental stages.the brown dog tick, rhipicephalus sanguineus, is the most widespread tick in the world and infests primarily domestic dogs. studies on the bio-ecology of r. sanguineus have been carried out worldwide, but little is known of the on-dog relationships of tick developmental stages and their possible role on tick feeding performance, reproduction and pathogen transmission. we studied the relationships between different developmental stages of r. sanguineus on particular body areas of naturally infest ...201020957414
seasonal variation in the effect of climate on the biology of rhipicephalus sanguineus in southern europe.rhipicephalus sanguineus is the most widespread tick in the world and a vector of many pathogens infecting dogs and humans. to date, there have been no investigations on the biology of r. sanguineus under natural mediterranean climatic conditions.201021078221
rickettsial infection in domestic mammals and their ectoparasites in el valle de antón, coclé, panamá.the present research evaluated the presence of rickettsia spp. on ectoparasites of horses and dogs (using pcr techniques), and their sera (using immunofluorescence assay) in el valle de antón town in panama. a total of 20 horses and 20 dogs were sampled, finding four species of ectoparasites on dogs (the ticks rhipicephalus sanguineus, amblyomma ovale, amblyomma oblongoguttatum, and the flea ctenocephalides felis), and two tick species on horses (amblyomma cajennense and dermacentor nitens). dna ...201021144663
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 ...201021184702
experimental primary and secondary infections of domestic dogs with ehrlichia this study, the infection dynamics of ehrlichia ewingii, causative agent of granulocytotropic ehrlichiosis in dogs and humans, was examined in experimentally infected dogs by using a combination of physical examination, hematologic and biochemical analyses, and molecular and serologic assays. for the experimental trials, blood from an e. ewingii-infected dog was inoculated intravenously into two na+»ve dogs and two dogs with prior experimental exposure to e. ewingii (both were negative for e. ...201121397411
mathematical modelling of the impact of climatic conditions in france on rhipicephalus sanguineus tick activity and density since 1960.rhipicephalus sanguineus, the brown dog tick, has a worldwide distribution in areas with a relatively warm climate, including mild winters. this tick plays an important role as vector for various animal and human pathogens, including bacteria and protozoa. based on precise daily meteorological data from the past 40 years, combined with mathematical modelling designed to predict tick activity, two modelling approaches were developed. the first examined the evolution of the number of weeks with fa ...201121590676
babesiosis in an egyptian boy aquired from pet dog, and a general review.human babesiosis has been documented in many countries. it is a zoonotic protozoan disease of medical, veterinary and economic importance. in this study, a twelve years old boy was referred to the hospital with intermittent fever of unknown origin. on clinical, parasitological and serological bases the case proved to be babesiosis. the boy acquired the infection from his pet dog which was heavily infested with rhipicephalus sanguineus and suffered a mild feature of animal babesiosis. the patient ...201121634246
efficacy of a novel topical combination of fipronil, amitraz and (s)-methoprene for treatment and control of induced infestations of brown dog ticks (rhipicephalus sanguineus) on dogs.four laboratory studies were conducted to demonstrate that a single topical dose of a novel spot-on combination containing fipronil, amitraz and (s)-methoprene (certifect™, merial limited, ga, usa) is efficacious against the brown dog tick, rhipicephalus sanguineus. in each study, 6-8 male and 6-8 female purpose-bred, laboratory mongrels, terrier cross or beagles were randomly assigned to one of two study groups (treated and untreated), based on pre-treatment parasite counts. starting on the day ...201121777733
distribution of rickettsia rickettsii in ovary cells of rhipicephalus sanguineus (latreille1806) (acari: ixodidae).abstract:201122117572
identification of rickettsia felis in fleas but not ticks on stray cats and dogs and the evidence of rickettsia rhipicephali only in adult stage of rhipicephalus sanguineus and rhipicephalus haemaphysaloides.rickettsia spp. are zoonotic pathogens and mainly transmitted by various arthropod vectors, such as fleas, ticks, and lice. previous epidemiological studies indicated that ectoparasites infested on dogs or cats may be infected by rickettsia spp., and transmit them to human beings accidentally. in this study, the prevalence of rickettsia infection was evaluated using fleas and ticks from stray dogs and cats in taiwan. a total of 158 pools made by 451 cat fleas (ctenocephalides felis) from 37 dogs ...201122000945
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