Rickettsial survey and ticks infesting small mammals from the Amazon forest in midwestern Brazil

2020 ◽  
Vol 25 (1) ◽  
pp. 78-91 ◽  
Author(s):  
Ana Cláudia Colle ◽  
Ravena Fernanda Braga Mendonça ◽  
Maerle Oliveira Maia ◽  
Leodil Costa Freitas ◽  
Thiago Fernandes Martins ◽  
...  
Keyword(s):  
Small Mammals ◽  
Spotted Fever ◽  
First Record ◽  
Sensu Stricto ◽  
Amazon Forest ◽  
Spotted Fever Group ◽  
Free Living ◽  
Mato Grosso ◽  
Amblyomma Ticks ◽  
Tick Tissue

In the present study, samples of tick, tissue and blood from free-living wild small mammals (rodents and marsupials) captured in two municipalities from the Amazon biome of the Mato Grosso state, were molecularly tested for rickettsial infection. A total of 148 mammal specimens (46 rodents and 102 marsupials) were trapped, and 2,700 Amblyomma ticks (2,000 larvae and 700 nymphs) were collected. Ticks were recognized into four Amblyomma species: Amblyomma cajennense sensu stricto, Amblyomma coelebs, Amblyomma humerale, and Amblyomma scalpturatum, with new data for tick-host associations from small mammals in the Amazon biome. All tissue and blood samples of small mammals tested by PCR for rickettsial detection were negative. However, concerning tick-Rickettsia associations, Rickettsia amblyommatis was detected in all four tick species identified in the present study, being the first record for A. scalpturatum ticks. Furthermore, an uncharacterized species of Rickettsia belonging to the spotted fever group was detected in A. humerale as well. 

scholarly journals Serosurvey of Rickettsia spp. in small mammals from Mato Grosso do Sul state, Brazil

2017 ◽  
Vol 47 (1) ◽  
Author(s):  
Lina de Campos Binder ◽  
Felipe da Silva Krawczak ◽  
Jonas Sponchiado ◽  
Geruza Leal Melo ◽  
Jonas Moraes-Filho ◽  
...  
Keyword(s):  
Small Mammals ◽  
Indirect Immunofluorescence ◽  
Spotted Fever ◽  
Immunofluorescence Assay ◽  
Spotted Fever Group ◽  
Small Rodents ◽  
Serum Samples ◽  
Rickettsia Species ◽  
Mato Grosso ◽  
Mato Grosso Do Sul

ABSTRACT: This study aimed to evaluate exposure of wild small mammals to spotted fever group (SFG) rickettsiae in Mato Grosso do Sul State, central-western Brazil. Serum samples of 68 small mammals were analyzed by indirect immunofluorescence assay (IFA) against six Rickettsia species from Brazil. Overall, 37.5% (9/24) marsupials and 6.8% (3/44) small rodents were seroreactive to at least one of the Rickettsia species, with end point titres ranging from 64 to 512. These results suggested that wild small mammals were infected by SFG rickettsiae, and could participate in the ecology of rickettsiae in Mato Grosso do Sul, Brazil.

scholarly journals Mecistogaster linearis (Fabricius) (Odonata: Coenagrionidae): First Record from Mato Grosso do Sul State, Brazil

2016 ◽  
Vol 9 (3) ◽  
pp. 212-215 ◽  
Author(s):  
Marciel Elio Rodrigues ◽  
Ricardo Koroiva ◽  
Eric Ragalzi-da-Silva ◽  
Emanuelle Batista De Moura
Keyword(s):  
Rio De Janeiro ◽  
Large Body ◽  
First Record ◽  
Wide Distribution ◽  
Sao Paulo ◽  
Amazon Forest ◽  
São Paulo ◽  
Mato Grosso ◽  
Forest Regions ◽  
Mato Grosso Do Sul

Commonly called “helicopter damselflies”, Mecistogaster species (Coenagrionidae) are recognized by their large body size in comparison with other Odonata species, ability to flap both anterior and posterior wings in opposite directions, and preference for dense forest. These species feed on spiders and require trunks or plants that can accumulate water, like bromeliads, for laying eggs. This relationship with phytotelm environments makes the Mecistogaster species sensitives to forest fragmentation and habitat changes. In Brazil, there are records of seven species, mainly in Amazon forest regions. Mecistogaster linearis (Fabricius) has a wide distribution reported in the Brazilian states of Acre, Amazonas, Roraima, Pará, Rondônia, Mato Grosso, Rio de Janeiro, and São Paulo. Herein, we report the first record of M. linearis in the state of Mato Grosso do Sul with specimens sampled from the municipality of Corumbá, in the Pantanal.Mecistogaster linearis (Fabricius) (Odonata: Coenagrionidae): Primeiro registro para o Estado de Mato Grosso do Sul, BrasilResumo. Conhecidas como “libélulas helicóptero”, as espécies do gênero Mecistogaster (Coenagrionidae) são caracterizadas pelo grande tamanho quanto comparado as outras espécies de Odonata, pela habilidade de bater as duas asas anteriores e posteriores em sentidos opostos e preferência por habitats de interiores de matas. Estas se alimentam de aranhas e dependem principalmente de troncos de árvores ou plantas, como bromélias, capazes de acumular água para a postura dos ovos. A relação com ambientes de fitotelmatas faz com que as espécies deste gênero sejam sensíveis a fragmentação florestal e a alterações em seu habitat. No Brasil há registros de sete espécies, com ocorrências principalmente em regiões de floresta amazônica. Mecistogaster linearis (Fabricius) tem uma ampla distribuição, sendo reportada, até então no país, para os estados do Acre, Amazonas, Roraima, Pará, Rondônia, Mato Grosso, Rio de Janeiro e São Paulo. Nesta comunicação, reportamos o primeiro registro desta espécie para o estado de Mato Grosso do Sul, Brasil, coligida no município de Corumbá, região do Pantanal.

scholarly journals Spotted fever group Rickettsia in Amblyomma dubitatum tick from the urban area of Campo Grande, Mato Grosso do Sul, Brazil

2015 ◽  
Vol 6 (2) ◽  
pp. 107-110 ◽  
Author(s):  
Jaqueline Matias ◽  
Marcos Valério Garcia ◽  
Rodrigo Casquero Cunha ◽  
André de Abreu Rangel Aguirre ◽  
Jacqueline Cavalvante Barros ◽  
...  
Keyword(s):  
Urban Area ◽  
Spotted Fever ◽  
Spotted Fever Group ◽  
Mato Grosso ◽  
Spotted Fever Group Rickettsia ◽  
Mato Grosso Do Sul

scholarly journals Serosurvey on rickettsiae of the spotted fever group and Rickettsia bellii among dogs in the state of Goiás, Brazil

2020 ◽  
Vol 29 (2) ◽  
Author(s):  
Lucianne Cardoso Neves ◽  
Ana Laura Gonçalves Barreto ◽  
Mariana Xavier de Souza ◽  
Danieli Brolo Martins ◽  
Amália Regina Mar Barbieri ◽  
...  
Keyword(s):  
Spotted Fever ◽  
First Record ◽  
Immunofluorescence Assay ◽  
The State ◽  
Spotted Fever Group ◽  
Serum Samples ◽  
Rickettsia Parkeri ◽  
Serological Tests ◽  
Rickettsia Rickettsii ◽  
Rickettsia Bellii

Abstract The purpose of this study was to do a serological survey on three rickettsial species: Rickettsia rickettsii and Rickettsia parkeri, two species of the spotted fever group (SFG) that are considered to be great importance for public health; and Rickettsia bellii, a species of unknown pathogenicity that infects a variety of human-biting ticks. Serum samples from 273 dogs were tested using the indirect immunofluorescence assay (IFA). A total of 52 samples (19.04%) were seropositive for at least one of the three Rickettsia spp. antigens. Thirty-eight (73.07%), twelve (23.07%) and one (1.92%) of these dogs showed homologous reactions to R. bellii, R. rickettsii and R. parkeri, respectively. Our results showed that the seroprevalence of Rickettsia spp. was relatively low. However, the positive serological tests indicated that these dogs had become infected by these agents at some point in their lives. Lastly, our study adds to the previous knowledge on the epidemiology of rickettsiosis in the state of Goiás by doing the first record of detection of anti-R. rickettsii, R. parkeri and R. bellii antibodies by IFA among dogs, thus indicating that these agents may be circulating in the dog population analyzed.

scholarly journals Ticks on Didelphis albiventris from a Cerrado area in the Midwestern Brazil

2018 ◽  
Vol 23 (5) ◽  
pp. 935
Author(s):  
Erica Fernanda G. Gomes de Sá ◽  
Vinicius Da Silva Rodrigues ◽  
Marcos Valério Garcia ◽  
Namor Pinheiro Zimmermann ◽  
Vanessa Do Nascimento Ramos ◽  
...  
Keyword(s):  
Tick Infestation ◽  
Spotted Fever ◽  
Spotted Fever Group ◽  
Forest Patches ◽  
Mato Grosso ◽  
High Prevalence ◽  
Host Parasite ◽  
Special Relevance ◽  
Mato Grosso Do Sul ◽  
Didelphis Albiventris

This experiment studied tick fauna associated to Didelphis albiventris Lund 1840 from a Cerrado area (Mato Grosso do Sul State, non-adjoining to Pantanal) inserted in a pasture and agricultural activities matrix, with few natural preserved forest patches. Authors also summarized data on ticks parasitizing Didelphis spp. in Brazil, and discussed infestation patterns in different biomes and locations. Study took place in Cervinho Farm, Bandeirantes Municipality. For captures, Tomahawk-like traps were distributed along two forest patches (30 each) during five nights. Captures occurred monthly (July/2013 to September/2014), sampling both fragments on alternate months. Animals were sedated and ticks were collected and stored in vials containing ethanol (70%) for identification. 51 D. albiventris were captured in 15 campaigns. Tick prevalence was 100%, and 49.5% of the animals were co-infested by two or more tick species. Four parasitizing species were found: Amblyomma sculptum Berlese, 1888 (78 nymphs), Ixodes loricatus Neumann, 1899 (56 adults), Amblyomma dubitatum Neumann, 1899 (45 nymphs), Amblyomma coelebs Neumann, 1899 (32 nymphs) and Amblyomma sp. (123 larvae). A. sculptum was the most abundant tick, but most frequent species were A. coelebs and A. dubitatum, followed by I. loricatus. Co-occurrences of more than two species were observed among all tick pairs. D. albiventris usually presents high prevalence of tick infestation. However, this study presented 100% prevalence. Knowledge of host-parasite relation and interactions between different ticks that coexist on a same host are essential, since such interaction may favor pathogen dissemination. This is of special relevance regarding D. albiventris, known for participating in maintenance of ecological cycles of Spotted Fever Group rickettsiae.

scholarly journals Amblyomma scalpturatum Neumann, 1906 (Acari: Ixodidae): confirmation in Acre State, Brazil, and description of parasitism in a human

2019 ◽  
Vol 28 (3) ◽  
pp. 473-478
Author(s):  
André de Abreu Rangel Aguirre ◽  
Vinícius da Silva Rodrigues ◽  
Ivaneide Nunes da Costa ◽  
Marcos Valério Garcia ◽  
Bárbara Guimarães Csordas ◽  
...  
Keyword(s):  
Life Cycle ◽  
Tick Species ◽  
New Records ◽  
First Record ◽  
Amazon Forest ◽  
Forest Fragments ◽  
Free Living ◽  
The North ◽  
Complete Life Cycle

Abstract Amblyomma scalpturatum is a tick species that is unique to South America. It is commonly associated with the Amazon biome and has been reported in some Brazilian states. This tick species exhibits host specificity: it parasitizes tapirs and suidae. Its role in transmitting pathogens to humans is still unknown. Amblyomma scalpturatum is known to be a human-biting tick; however, there is only one report showing that humans make suitable hosts for this species. The knowledge of tick fauna is lacking in the Acre State. This study collected free-living ticks with the aim of finding new records in Acre State. Collections were carried out in Amazon forest fragments in Rio Branco municipality. An A. scalpturatum specimen was identified and submitted sequencing of the ITS-2 gene. This study presents the first molecular confirmation of A. scalpturatum collected in situ in Acre State, North Region, Brazil. This study also presents the first record of a successfully completed feeding by an A. scalpturatum nymph on a human host in the North region of Brazil. Further investigation is needed to ascertain the complete life cycle of this tick species, its seasonality in the environment, and its relationship to pathogens and competence to transmit them.

Sign in / Sign up

Export Citation Format

Share Document