scholarly journals Report on ticks collected in the Southeast and Mid-West regions of Brazil: analyzing the potential transmission of tick-borne pathogens to man

1999 ◽  
Vol 32 (6) ◽  
pp. 613-619 ◽  
Author(s):  
Luiz Tadeu Moraes Figueiredo ◽  
Soraya Jabur Badra ◽  
Luiz Eloy Pereira ◽  
Matias Pablo Juan Szabó
Keyword(s):  
Close Contact ◽  
Spotted Fever ◽  
Rhipicephalus Sanguineus ◽  
Domestic Animals ◽  
Boophilus Microplus ◽  
Amblyomma Cajennense ◽  
Wild Mammals ◽  
Rickettsia Rickettsii ◽  
Boophilus Annulatus ◽  
Hydrochaeris Hydrochaeris

Specimens of ticks were collected in 1993, 1996, 1997, and 1998, mostly from wild and domestic animals in the Southeast and Mid-West regions of Brazil. Nine species of Amblyommidae were identified: Anocentor nitens, Amblyomma cajennense, Amblyomma ovale, Amblyomma fulvum, Amblyomma striatum, Amblyomma rotundatum, Boophilus microplus, Boophilus annulatus, and Rhipicephalus sanguineus. The potential of these tick species as transmitters of pathogens to man was analyzed. A Flaviviridade Flavivirus was isolated from Amblyomma cajennense specimens collected from a sick capybara (Hydrochaeris hydrochaeris). Amblyomma cajennense is the main transmitter of Rickettsia rickettsii (=R. rickettsi), the causative agent of spotted fever in Brazil. Wild mammals, mainly capybaras and deer, infested by ticks and living in close contact with cattle, horses and dogs, offer the risk of transmission of wild zoonosis to these domestic animals and to man.

scholarly journals Ticks on birds in a savanna (Cerrado) reserve on the outskirts of Uberlândia, Minas Gerais, Brazil

2013 ◽  
Vol 22 (1) ◽  
pp. 46-52 ◽  
Author(s):  
Jamile de Oliveira Pascoal ◽  
Marcus do Prado Amorim ◽  
Maria Marlene Martins ◽  
Celine Melo ◽  
Eurípedes Luciano da Silva Júnior ◽  
...  
Keyword(s):  
Urban Area ◽  
Tick Species ◽  
Tick Infestation ◽  
Rhipicephalus Sanguineus ◽  
Domestic Animals ◽  
Minas Gerais ◽  
Boophilus Microplus ◽  
Amblyomma Cajennense ◽  
Mean Intensity ◽  
Natural Reserve

We report tick infestations on birds, in the environment and on domestic animals in a non-forested phytophysiognomy, the savanna-like Cerradosensu stricto, in a natural reserve on the outskirts of the urban area of Uberlândia, Minas Gerais, Brazil. Overall, 238 birds within 50 species, 15 families and six orders were caught. Passeriformes were the most numerous, with 216 birds (90.75%), among which 22 had ticks (n = 31). Within this order, the prevalence of tick infestation was 10.2%, and the abundance and mean intensity were 0.14 and 1.41, respectively. Only immature ticks of the species Amblyomma nodosum were found on the birds. The tick species found both on animals (Rhipicephalus sanguineus,Rhipicephalus (Boophilus)microplus, Amblyomma cajennense andDermacentor nitens) and in the environment (Amblyomma dubitatum, Rhipicephalus(B.) microplus andAmblyomma cajennense) were as expected. This difference in tick species between the environment and birds possibly occurred because the sampling of the environment was limited to the ground. This study also highlights the importance of the diverse microenvironments used by ticks and hosts in the same area and the complex ecology of bird-tick relationships. Ecological and epidemiological aspects of the findings are discussed.

scholarly journals Caracterização da população de ectoparasitos em cães de núcleos de expansão urbana de Juiz de Fora, Minas Gerais, Brasil

2008 ◽  
Vol 17 (4) ◽  
pp. 185-188 ◽  
Author(s):  
Denise F. Rodrigues ◽  
Erik Daemon ◽  
André Flávio S.F. Rodrigues
Keyword(s):  
Rhipicephalus Sanguineus ◽  
Minas Gerais ◽  
Ctenocephalides Felis ◽  
Boophilus Microplus ◽  
Amblyomma Cajennense ◽  
Tunga Penetrans

No presente trabalho caracterizou-se a população de ectoparasitos em cães de núcleo de expansão urbana de Juiz de Fora, MG. As coletas foram realizadas de julho a setembro de 2003, examinando-se 101 cães SRD (sem raça definida). Os ectoparasitos foram coletados através de inspeção visual e tátil dos animais e acondicionados em frascos com etanol 70°GL e identificados sob estereoscopia. Espécimes foram clarificados e montados para análise em microscopia fotônica. Dentre os sifonápteros, Ctenocephalides felis foi mais prevalente (64,35%) com intensidade média de 6,12 ± 5,37 sifonápteros/cão, seguido por Rhopalopsyllus lutzi (3,96%), híbrida C. felis X C. canis (1,98%), Tunga penetrans (1,98%). Aúnica espécie de fitiráptero encontrada foi Trichodectes canis (7,92%) com 1,3 ± 0,51 fitiráptero/cão. Dentre os ixodídeos, Rhipicephalus sanguineus foi a espécie mais prevalente (49,50%) com intensidade média de 6,44 ± 10,2 ixodídeos/ cão, seguido por Amblyomma cajennense (3,96%), Boophilus microplus (2,97%), A. ovale (1%) e A. aureolatum (1%). As ninfas de ixodídeos foram separadas em ninfas de Amblyomminae (58,41%) com 10,11 ± 10,09 ninfas/cão e ninfas Rhipicephalinae (24,75%) com 2,64 ± 3,25 ninfas/cão. Em 3,96 % dos cães foram encontradas larvas de ixodídeo.

scholarly journals Efficacy of Novaluron + Pyriproxyfen (Tekko Pro) Insect Growth Regulators Against Amblyomma americanum (Acari: Ixodidae), Rhipicephalus (Boophilus) annulatus, Rhipicephalus (Boophilus) microplus, and Rhipicephalus sanguineus

2019 ◽  
Vol 56 (5) ◽  
pp. 1338-1345 ◽  
Author(s):  
Allan T Showler ◽  
William A Donahue ◽  
Jessica L Harlien ◽  
Michael W Donahue ◽  
Bret E Vinson ◽  
...  
Keyword(s):  
Growth Regulators ◽  
Metabolic Activity ◽  
Residual Activity ◽  
Rhipicephalus Sanguineus ◽  
Amblyomma Americanum ◽  
Boophilus Microplus ◽  
Insect Growth Regulators ◽  
Insect Growth ◽  
Boophilus Annulatus ◽  
Cattle Fever Tick

Abstract Ixodids are globally distributed pests that transmit many disease agents. Increasing resistance to conventional acaricides raises the need for alternative tactics. Novaluron and pyriproxyfen are insect growth regulators (IGRs) that have variable potencies against acarines. We conducted in vitro and in vivo experiments to assess novaluron + pyriproxyfen (marketed as Tekko Pro) against four ixodid species. Laboratory assays on the brown dog tick, Rhipicephalus sanguineus (Latreille) (Ixodida: Ixodidae), and the lone star tick, Amblyomma americanum (L.) (Ixodida: Ixodidae), reduced metabolic activity in larvae and nymphs. Concentrations of novaluron + pyriproxyfen dried on filter paper impeded molting of larval R. sanguineus (less effective against nymphs). Molting A. americanum larvae were reduced by >95% using 4 and 8 µg/cm2 eliminated molting; nymphal molting was reduced but not halted even at 16 µg/cm2. On calves, novaluron + pyriproxyfen stopped larval A. americanum metabolic function 1 d post-treatment and larvae did not molt. When larvae were released 30 d after treatment, metabolic activity was reduced by 95% and molting was reduced by 94%. Southern cattle fever tick, Rhipicephalus (Boophilus) microplus (Canestrini) (Ixodida: Ixodidae), larvae released 1 d after treatment on calves were 99% prevented from reaching adulthood. The treatment did not interfere with larval development when larvae were released 52 d after treatment. The cattle fever tick, Rhipicephalus (Boophilus) annulatus (Say) (Ixodida: Ixodidae), failed to reach adulthood when larvae were released on calves a day after treatment (residual activity was not assessed for R. annulatus). These IGRs, and possibly others, offer an alternative to conventional acaricides for ixodid control on cattle.

scholarly journals Detection of Rickettsia rickettsii in the tick Amblyomma cajennense in a new Brazilian spotted fever-endemic area in the state of Minas Gerais

2005 ◽  
Vol 100 (8) ◽  
pp. 841-845 ◽  
Author(s):  
Elizângela Guedes ◽  
Romário C Leite ◽  
Márcia CA Prata ◽  
Richard C Pacheco ◽  
David H Walker ◽  
...  
Keyword(s):  
Endemic Area ◽  
Spotted Fever ◽  
Minas Gerais ◽  
The State ◽  
Amblyomma Cajennense ◽  
Rickettsia Rickettsii ◽  
Brazilian Spotted Fever

scholarly journals Studies on the Vertical Distribution of Ticks of Domestic Animals and Their Public Health Importance in Nilgiri Hills and Adjoining Areas of Tamil Nadu State (India)

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Kaushal Kumar ◽  
N. Balakrishnan ◽  
Abhay Kumar Sharma
Keyword(s):  
Public Health ◽  
Tick Species ◽  
Tamil Nadu ◽  
Rhipicephalus Sanguineus ◽  
Domestic Animals ◽  
Boophilus Microplus ◽  
Public Health Importance ◽  
Tamil Nadu State ◽  
The Nilgiris ◽  
Almost All

The Nilgiri hills and adjoining downhill areas provide favourable ecological conditions for the propagation of haematophagous arthropods owing to richness in vegetation and animal activities. A study has been undertaken during 2008–2010 on the distribution and abundance of ticks of domestic animals in seven different biotopes. A total of 3,008 domestic animals were examined in areas ranging from an altitude of 300 to 2200 meters above mean sea level (MSL) of which 1,335 (44.5%) animals were having tick infestation. A total of 6,012 adult and immature ticks belonging to 12 species (11 ixodid and one argasid) were collected. Eleven tick species were collected from Kallar area situated downhill eastern slopes of the Nilgiris followed by Burliar area (7 species) located at higher altitudes. From Masinagudi area near to dense forests and scrub jungles, five species were recorded. However, at higher elevations on the hills, Udhagamandalam area, only one species was recorded. Among various tick species recorded in the study,Boophilus micropluswas distributed in almost all areas surveyed followed byHaemaphysalis spinigeraandRhipicephalus sanguineus. The factors governing their distribution and epidemiological significance in the transmission of various tick-borne diseases of public health importance are discussed.

scholarly journals Abundance of Ticks (Acari: Ixodidae) and Presence of Rickettsia and Anaplasma in Ticks Infesting Domestic Animals From Northern India

2021 ◽  
Author(s):  
Brij Ranjan Misra ◽  
Niraj Kumar ◽  
Rajni Kant ◽  
Hirawati Deval ◽  
Rajeev Singh ◽  
...  
Keyword(s):  
Rural Areas ◽  
Tick Species ◽  
Rhipicephalus Sanguineus ◽  
Ixodid Tick ◽  
Domestic Animals ◽  
Boophilus Microplus ◽  
Ixodid Ticks ◽  
Northern India ◽  
Obligate Intracellular Bacteria ◽  
Hematophagous Arthropods

Abstract Rickettsia and Anaplasma are bacteria that can be transmitted by hematophagous arthropods such as ticks infesting animals in close proximity to humans. The main objective of the present study was to investigate abundance of common tick species infesting domestic animals and presence of Rickettsia and Anaplasma in tick populations. Adult ticks were collected from domestic animals in rural areas and screened by molecular detection of bacterial DNA for these two genera of bacteria. A total of 1,778 adult ixodid tick specimens were collected from 200 cattle, 200 buffaloes, 200 goats, and 40 dogs. The collection consisted of four species of ixodid ticks, Rhipicephalus (Boophilus) microplus (Canestrini) (83.8%), Hyalomma kumari (Sharif) (7.1%), Rhipicephalus sanguineus (Latreille) (6.4%), and Dermacentor auratus (Supino) (2.7%) infesting the domestic animals. The prevalence of all the collected tick species was highest in the month of October. Anaplasma spp. was the most frequently identified bacteria (3.3%) in tested ticks. Of 17 positive tick pools for Anaplasma spp., 14 pools were from ticks infesting cattle, 2 pools of ticks collected from buffalo, and the remaining pool were ticks infesting a goat at the time of collection. Although 1.6% tick pools of R. microplus collected from cattle tested positive for Rickettsia spp., present investigation provides evidence of the most prevalent ixodid ticks infesting domestic animals and the presence of obligate intracellular bacteria, Rickettsia and Anaplasma, in these ticks collected in the Gorakhpur division of Northern India.

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