Ixodid fauna and zoonotic agents in ticks from dogs: first report of Rickettsia rickettsii in Rhipicephalus sanguineus in the state of Mato Grosso do Sul, mid-western Brazil

Almeida, Raphael Ferreira; Garcia, Marcos Valério; Cunha, Rodrigo Casquero; Matias, Jaqueline; Silva, Elaine Araújo e; Matos, Maria de Fátima Cepa; Andreotti, Renato

doi:10.1007/s10493-012-9641-y

Cited by 16 publications

(13 citation statements)

References 46 publications

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“…South and Southeast regions had the highest incidence rates, with most cases being reported in São Paulo and Santa Catarina, a finding corroborated by Barros-Silva et al [21]. Moreover, the present study shows the first cases of SF in the states of Mato Grosso do Sul and Rondônia, where Rickettsia species were already found in ticks [22, 23]. These results show an expansion of SF in Brazil.…”

Section: Discussionsupporting

confidence: 89%

An update on the epidemiological situation of spotted fever in Brazil

Oliveira

Guimarães

Reckziegel

et al. 2016

J Venom Anim Toxins Incl Trop Dis

109

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BackgroundSpotted fever is a tick-borne rickettsial disease. In Brazil, its notification to the Ministry of Health is compulsory. Since 2007, cases of spotted fever have been integrated to the Notifiable Diseases Information System, and epidemiological analyzes are part of the routines on surveillance programs.MethodsThis descriptive study updates epidemiological information on cases of spotted fever registered in Brazil between 2007 and 2015.ResultsIn Brazil, 17,117 suspected cases of the disease were reported and 1,245 were confirmed in 12 states, mainly in São Paulo (550, 44.2 %) and Santa Catarina (276, 22.2 %). No geographic information was registered for 132 cases (10.6 %). Most of the infected people were men (70.9 %), mainly in rural areas (539, 43.3 %), who had contact with ticks (72.7 %). A higher number of suspected cases were registered between 2011 and 2015, but the number of confirmed cases and the incidence were relatively low. Moreover, 411 deaths were registered between 2007 and 2015, mainly in the southeastern region of the country, where the case-fatality rate was 55 %. Lack of proper filling of important fields of notification forms was also observed.ConclusionsThe results showed expansion of suspected cases of spotted fever and high case-fatality rates, which could be related to diagnostic difficulties and lack of prompt treatment. These factors may comprise limitations to the epidemiological surveillance system in Brazil, hence improvement of notification and investigation are crucial to reduce morbidity and mortality due to spotted fever in Brazil.

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Section: Discussionsupporting

confidence: 89%

An update on the epidemiological situation of spotted fever in Brazil

Oliveira

Guimarães

Reckziegel

et al. 2016

J Venom Anim Toxins Incl Trop Dis

109

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“…among dogs (LABRUNA & PEREIRA, 2001;ALMEIDA et al, 2013), the frequency of hemotropic mycoplasmas is generally low, especially when compared with other tick-borne pathogens such as Ehrlichia canis, Anaplasma platys and Babesia vogeli, also transmitted by ticks (RAMOS et al, 2010;COSTA, 2011). This observation may raise questions about role of R. sanguineus s.l.…”

Section: Resultsmentioning

confidence: 99%

Occurrence of Mycoplasma haemocanis in dogs infested by ticks in Campo Grande, Mato Grosso do Sul, Brazil

Soares

Echeverria

Pazzuti

et al. 2016

Rev. Bras. Parasitol. Vet.

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Hemotropic mycoplasmas in dogs, such as Mycoplasma haemocanis, have been described worldwide. Recently, these pathogens have been reported to be causative agent of zoonosis. It is known that its transmission may occur through the action of blood-sucking arthropods (e.g. ticks or fleas), through blood transfusion, contaminated fomites and/or transplacentally. In Brazil, M. haemocanis is present in practically all regions and the tick Rhipicephalus sanguineus sensu lato is suspected the main vector. In the municipality of Campo Grande, state of Mato Grosso do Sul, there is little information about infection of dogs by M. haemocanis, or on the main epidemiological features associated with it. Thus, the aim of the present study was to determine the occurrence of M. haemocanis among dogs infested by ticks and to assess possible associations with some epidemiological factors. The polymerase chain reaction (PCR) and DNA sequencing were used to analyze dog blood samples (n = 94). DNA from M. haemocanis was detected in four samples. No significant associations were observed with any epidemiological parameter analyzed here. However, the results from this study confirm that this pathogen is circulating in this region and should be considered in the differential diagnosis of diseases among anemic dogs.

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“…In addition, because A. aureolatum rarely attacks humans, the incidence of RMSF is also low in these specific areas of endemicity in southeastern Brazil (163). Finally, a number of recent studies from Brazil reported R. rickettsii infecting Rhipicephalus sanguineus ticks collected from dogs in areas where RMSF is endemic, where dogs are frequently infested by A. aureolatum or A. cajennense ticks (28,162,(164)(165)(166), and reports have also come from an area where RMSF is not endemic (167). As it has been shown that R. rickettsii is maintained by transstadial and transovarial transmission in Brazilian Rhipicephalus sanguineus ticks (26,28) and that the domestic dog is an efficient amplifier host of R. rickettsii in Rhipicephalus sanguineus ticks (26), studies are needed to elucidate the participation of this tick species in the epidemiology of RMSF in South America.…”

Section: South Americamentioning

confidence: 99%

Update on Tick-Borne Rickettsioses around the World: a Geographic Approach

et al. 2013

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SUMMARY Tick-borne rickettsioses are caused by obligate intracellular bacteria belonging to the spotted fever group of the genus Rickettsia . These zoonoses are among the oldest known vector-borne diseases. However, in the past 25 years, the scope and importance of the recognized tick-associated rickettsial pathogens have increased dramatically, making this complex of diseases an ideal paradigm for the understanding of emerging and reemerging infections. Several species of tick-borne rickettsiae that were considered nonpathogenic for decades are now associated with human infections, and novel Rickettsia species of undetermined pathogenicity continue to be detected in or isolated from ticks around the world. This remarkable expansion of information has been driven largely by the use of molecular techniques that have facilitated the identification of novel and previously recognized rickettsiae in ticks. New approaches, such as swabbing of eschars to obtain material to be tested by PCR, have emerged in recent years and have played a role in describing emerging tick-borne rickettsioses. Here, we present the current knowledge on tick-borne rickettsiae and rickettsioses using a geographic approach toward the epidemiology of these diseases.

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Ixodid fauna and zoonotic agents in ticks from dogs: first report of Rickettsia rickettsii in Rhipicephalus sanguineus in the state of Mato Grosso do Sul, mid-western Brazil

Cited by 16 publications

References 46 publications

An update on the epidemiological situation of spotted fever in Brazil

An update on the epidemiological situation of spotted fever in Brazil

Occurrence of Mycoplasma haemocanis in dogs infested by ticks in Campo Grande, Mato Grosso do Sul, Brazil

Update on Tick-Borne Rickettsioses around the World: a Geographic Approach

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