ABSTRACT
Following the report of triatomine nymphs in a house in Arcadia, Miguel Pereira, state of Rio de Janeiro, Brazil, the infested dwelling was checked. Several eggs and 46 specimens of Triatoma vitticeps (Stal, 1859) were collected. Among them, adults and nymphal instars accounted for 43.5 percent and 56.5 percent, respectively. Analysis of blood meals showed the ecletism of this species; 24 (52.2 percent) were single feeds, 18 insects (39.1 percent) fed on two hosts and 4 (8.7 percent) on three hosts. Trypanosoma cruzi infection rate of examined specimens was 13 percent. Finally one of the residents of the house was positive for anti-T. cruzi antibodies using indirect immunofluorescence.
Subject(s)
Animals , Humans , Male , Female , Dogs , Chagas Disease , Insect Vectors , Triatoma , Trypanosoma cruzi , Birds , Brazil , Chagas Disease , Enzyme-Linked Immunosorbent Assay , Feeding Behavior , Fluorescent Antibody Technique, Indirect , Insect Vectors , Rodentia , TriatomaABSTRACT
There are several specific complexes belonging to the genus Triatoma Laporte, 1832, which are generally associated to specific geographic areas. Recent publications have linked the oliveirai complex to ecosystems of Mato Grosso, which are also present in other Brazilian states and even in other bordering countries as eastern Paraguay. The study of the abundant material collected during the last years allowed the description of several new species of the oliveirai complex: T. jurbergi Carcavallo, Galväo & Lent, 1998; T. baratai Carcavallo & Jurberg, 2000 and T. klugi Carcavallo, Jurberg, Lent & Galväo, 2001. Another new species belonging to the same complex is described here as T. vandae sp.n. It originates from the state of Mato Grosso, and has been reared in the insectary of the Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Departamento de Entomologia, Instituto Oswaldo Cruz-Fiocruz, Rio de Janeiro
Subject(s)
Animals , Male , Female , Triatominae , Brazil , TriatominaeABSTRACT
The study of the surface topography added details regarding the disposition of male caudal papillae, spicules and area rugosa apart from vulva and oral aperture. The occurrence of this nematode in the state of Amapá represents a new geographical distribution
Subject(s)
Animals , Male , Female , Chiroptera , Filarioidea , Brazil , Filarioidea , Microscopy, Electron, ScanningABSTRACT
The authors describe a new species of Triatominae (Hemiptera, Reduviidae) from the State of Rio Grande do Sul, Brazil. The study was made with specimens captured in basaltic formations, at an average altitude of 750 m.o.s.l. The new species is included in the oliveirai complex together with other four species T. williami, T. matogrossensis, T. guazu and T. jurbergi). The new species was compared with the most similar one, T. oliveirai, from which the main differences are on the proportions of head, ante and postocular regions, the general color pattern and the male genitalia, specially on the median process of the pygophore, the support of phallosome, the vesica and the process of the endosome
Subject(s)
Animals , Male , Female , Triatominae/classification , Brazil , Sex Differentiation , Triatominae/anatomy & histology , Triatominae/geneticsABSTRACT
Larval stages and adults of Procamallanus (Spirocamallanus) pereirai Annereaux, 1946 are described from naturally infected Paralonchurus brasiliensis (Steindachner) (Sciaenidae) from the coast of the State of Rio de Janeiro, Brazil. The translucent first-stage larvae have a denticulate process at the anterior end, no buccal capsule or esophagus undifferentiated into anterior muscular and posterior glandular parts and an elongate tail; third-stage larvae have a tail with three terminal projections, a buccal capsule divided into an anterior portion with 12-20 ridges running to the left and a posterior smooth portion, and an esophagus with muscular and glandular regions. Fourth-stage larvae exhibit a buccal capsule lacking a distinct basal ring with ridges running to the right and a tail with two terminal processes, as in adults. New host records are reported and their role in its life-cycle are discussed.
Subject(s)
Animals , Male , Female , Fishes/parasitology , Nematoda/anatomy & histology , Larva/anatomy & histologyABSTRACT
Triatoma jurbergi, n. sp. is described based on nine specimens of both sexes deposited in Rodolfo Carcavallo Collection in the Oswaldo Cruz Institute Entomological Collection. The new species can be separated from the closely related Triatoma guazu Lent & Wygodzinsky, 1979 by several characters. The must important are longer anteocular region; thin and pointed juga; the shape of the eyes without concavity in the posterior edge; much longer second rostral segment, passing the posterior edge of eyes; the absence of a ventral longitudinal depression on the abdomen; the general color redish, brown and orange and the male genitalia, mainly in the vesica lightly chitinized and smaller, the phallosome with apical projection and the pointed apex of the endosome process.
Subject(s)
Animals , Triatoma/anatomy & histology , BrazilABSTRACT
Säo apresentados aspectos da morfologia externa, da mensuraçäo e do exocório de ovos em nove dos quinze gêneros, atualmente conhecidos, de Triatominae: Alberprosenia, Carvenicola, Dipetalogaster, Eratyrus, Microtriatoma Panstrongylus, Psammolestes, Rhodnius e Triatoma. Foram analisadas as características da fixaçäo ou näo ao substrato, mensuraçäo do diâmetro e do comprimento, forma e textura da casca, do ovo e do opérculo, assim como a arquitetura do exocório observada através de microscopia óptica (M.O.) e microscopia eletrônica de varredura (M.E.V.), conforme trabalhos anteriores (Barata et al., 1980; Barata, 1981)
Subject(s)
Disease Vectors , Triatominae/anatomy & histology , Ovum , Triatominae/growth & developmentABSTRACT
Aborda os estágios ninfais da eclosäo do ovo até chegar à fase adulta
Subject(s)
Disease Vectors , Nymph/anatomy & histology , Triatominae/growth & developmentABSTRACT
Apresenta um esquema básico da anatomia dos triatomíneos que deve ser considerado como um guia. Neste sentido, säo mostradas algumas das características anatômicas e morfológicas sem se analisar qualquer espécie em particular
Subject(s)
Anatomy , Disease Vectors , Triatominae/anatomy & histologyABSTRACT
A female of triatoma of Triatoma guazu & Wygodzinsky, 1979, a rare species from which the allotype was recently described, was studied by scanning electronic microscopy and videomicroscope. Some structures of the head and the thorax are shown. Some of them could have taxonomic importance, as the oculto-ocellar region, the buccula, the anterolateral angle of the collar, the scutellum, wings and the stridulatory sulcus, which has as unusual lateral high rim.
Subject(s)
Animals , Triatoma/anatomy & histology , Microscopy, Video/instrumentation , Microscopy, Electron/instrumentationABSTRACT
Divulga os avanços e conhecimentos importantes na área dos triatomídeos. Muito embora a literatura sobre os triatomíneos seja vasta e represente um enorme esforço para a compreensäo da morfologia, biologia, fisiologia, comportamento, bioquímica, imunologia, etc., desta subfamília de reduvideos, os estudos detalhados sobre estes insetos raramente säo apresentados em conjunto. Esta é uma das funçöes desta obra. Cada capítulo sumariza nos textos e nas figuras e tabelas os principais assuntos, também enriquece a obra com uma extensa e variada bibliografia, dando uma enorme contribuiçäo para esta área da entomologia.
Subject(s)
Chagas DiseaseSubject(s)
Male , Female , Humans , Chagas Disease/classification , Chagas Disease/pathology , Chagas Disease/transmissionSubject(s)
Male , Female , Humans , Chagas Disease/classification , Chagas Disease/pathology , Chagas Disease/transmissionSubject(s)
Humans , Male , Female , Chagas Disease/classification , Chagas Disease/pathology , Chagas Disease/transmissionSubject(s)
Humans , Male , Female , Chagas Disease/classification , Chagas Disease/pathology , Chagas Disease/transmissionABSTRACT
Observed the resistance to the fast of Triatoma nitida in all phases of the life cycle. The nymphs of 1 st and 2 nd instars resisted about two months, and the 3rd ones more than three months and the 4 th were more resistants (five months). The nymphs of 5 th instar resisted for four months, and the adults about two months.
Subject(s)
Animals , Fasting/metabolism , Triatoma , Feeding BehaviorABSTRACT
The genus is monotypic and represented by the species M. spinolai (Porter, 1934). Based on the characteres described below the authors considered the separation of the genus Triatoma Laporte, 1832 and the return of the genus Mepraia. Strongly alar polymorphism, the abdomen of female with connexivum like in genus Dipetalogaster Usinger 1939, seven testicular follicles, like in Triatoma, however with a different relation of lenghts; external male genitalia showing a big and foliar process of the conjunctiva, vesica with an arch-shape, struts and endosoma process absent.
Subject(s)
Animals , Triatominae/physiologyABSTRACT
Triatoma infestans melanosoma was described in 1987 by Martinez, Olmedo & Carcavallo. In the present work the authors make a redescription, adding new characters, and based on biological and morphological aspects raise up to the level of species and being identified as Triatoma melanosoma. A detailed morphological study of the external male genitalia was made.