The evaluation of the role rodents as natural hosts Schistosoma mansoni was studied at Pamparrão Valley, Sumidouro, RJ, with monthly captures and examination animals. Twenty-three Nectomys squamipes 9 Akodom arviculoides a shistosomal infection rate 56.5% 22.2% respectively eliminated great majority viable eggs. With strain isolated from one naturally infected N. squamipes, we 75% simpatric Biomphalaria glabrata 100% albino Mus musculus mice. adult worms, after perfusion were located mainly...

Echinococcus granulosus (sensu lato) (s.l.) and vogeli are causative agents of chronic zoonotic diseases such as cystic polycystic echinococcosis, respectively. In Brazil, echinococcosis has a restricted geographical distribution in the North Region, while is observed South Region. Domestic dogs (Canis familiaris) fed with raw viscera represent risk factor for E. infection Although this practice frequent, it remains unclear whether domestic infected state Acre, located Amazon basin Region...

A prevalência das enteroparasitoses foi verificada através de inquérito coproparasitológico realizado março 1990 a outubro 1991, em 1.381 pré-escolares provenientes quatro comunidades faveladas da cidade do Rio Janeiro, Brasil. Por meio técnica Blagg et al. (1955), encontrada uma positividade geral 54,5. Os parasitos mais freqüentes foram Giardia lamblia e Ascaris lumbricoides, cerca 25,0% crianças investigadas. Correlação estatisticamente significativa observada entre idade nas menores três...

The development of resistance in three stages throughout an active infection (pre-ovular, acute and initial chronic stages) was studied, comparing the total number adult worms recovered from reinfected group control groups. It shown that Nectomys squamipes unable to develop tested conditions and, on other hand, reinfection pre-ovular period parasite led rodent present phenomenonacilitation, with reduction natural increase load. These results suggest existence forms immunity diverse...

Experiments were carried out to analyze the biological characteristics of two sympatric isolates Schistosoma mansoni derived from humans and murines in a low endemic transmission area (Sumidouro county, state Rio de Janeiro, Brazil). Sympatric reared-laboratory Biomphalaria glabrata C3H/He mice used as experimental hosts. Parameters assessed comprised: precercarial period, infectivity mortality (snails), prepatent (percentage cercariae maturation into adult worm) intestinal egg count (mice)....

Histopathologic and morphometric (area, perimeter, major minor diameters) analysis of hepatic granulomas isolated from twelve naturally infected Nectomys squamipes were compared to four experimentally ones six C3H/He mice. Liver paraffin sections stained for cells extracellular matrix. Both groups N. presented peculiar consisting predominantly large macrophages, full schistosome pigment, characterizing an exudative-macrophage granuloma type, smaller than the equivalent type in mouse....

The lack of knowledge regarding polycystic hydatid disease results in delayed or even incorrect diagnosis. systematic information treatment also makes it difficult to assess the and prognosis patients with peritoneal hepatic lesions caused by Echinococcus vogeli. Here we describe clinical features patients, propose a radiological classification protocol therapeutic option for that previously had only been used cases cystic echinococcosis (Echinococcus granulosus). A prospective cohort study...

Abstract The helminth fauna of Agouti paca (Linnaeus, 1766) has seldom been studied. In this paper, we report an unusual mixed infection Echinococcus vogeli Rausch & Bernstein, 1972 and Calodium hepaticum (syn. Capillaria hepatica Bancroft, 1863) in free-ranging from a forested region Acre (Brazil). Gross morphological examination revealed that liver contained multiple spherical to subspherical white or translucent lesions, which were isolated frequently contiguous partially covered by...

Twenty specimens of Nectomys squamipes born in captivity, were infected with 500 cercariae by the transcutaneous route. Coprologic examinations carried out from 5th to 23rd week after infection. On 7th, 8th, 12th, 16th, and weeks animals sacrificed perfused. The oogram was performed segments small intestine (proximal, medial distal portions) large intestine. average pre-patent period 42 days. number eggs varied 350 on 6th week, 800 13th. From 14th on, eliminated lower than 50 per gram feces....

Angiostrongylus lenzii n. sp. (Nematoda: Metastrongyloidea) is described and illustrated from the pulmonary artery of wild rodent Akodon montensis Thomas, 1913, collected in municipality Teresopólis, Rio de Janeiro State, Brazil. It represents 17th species genus 2nd South America as parasites rodents. This new most similar morphologically to vasorum, gubernaculatus, schmidti, morerai. can be distinguished them by morphology caudal bursa, ventral rays 2 3 with conspicuous knobs, differences...

Chemotherapy of food-borne trematodes relies on two drugs, praziquantel and tricabendazole, there is growing interest in finding alternative therapies. Plant oil extracts have long been used traditional Chinese medicine as sources bioactive compounds with antiparasitic activity. Species the genus Echinostoma are good models to test effective against trematodes. This study evaluated anthelmintic activity crude artesunate vitro newly excysted metacercariae paraensei by light scanning electron...

Journal Article Successful outcome of hepatic polycystic echinococcosis managed with surgery and chemotherapy Get access Nilton Ghiotti Siqueira, Siqueira aFundação Hospital Estadual do Acre, Brazil Search for other works by this author on: Oxford Academic PubMed Google Scholar Fernanda Barbosa de Almeida, Almeida bDepartamento Helmintologia, Instituto Oswaldo Cruz, FIOCRUZ, Rio Janeiro, Sidney Raimundo Silva Chalub, Chalub cCentro Controle Oncologia, Amazonas, José Roberto Machado-Silva,...

Echinococcus vogeli is known to occur in the neotropics, causing polycystic echinococcosis (PE) humans. The liver and lungs are most commonly affected organs. In this paper, we report six cases of human PE mesenteries without primary involvement. All patients, four males two females (median age 34 years; range 20-48 years), lived a forested area (Acre, Brazil). Physical examination revealed abdominal masses. patients were evaluated by CT scan, exploratory laparotomy serology immunoblot...

Stilestrongylus lanfrediae n. sp. is described from the small intestine of Oligoryzomys nigripes (Cricetidae: Sigmodontinae) collected in Atlantic Forest (Rio de Janeiro State, Teresópolis, Brazil). The new species shows some similarities to stilesi, freitasi, inexpectatus, moreli, and andalgala, but it can be distinguished these by following combination characters: 26 ridges males 25 females at mid-body, asymmetrical caudal bursa with a pattern type 2-2-1, rays 6 markedly shorter than other...

The experimental infection of A. arviculoides through different routes penetration Schistosoma mansoni cercariae (Transcutaneous and subcutaneous) was studied by the kinetics egg elimination in stools, recovery localization adult worms (in portal system mesenteric veins) quantitative count. It shown that is similar to albino mice which served as control relation efficiency routes, habitat These results suggest other aspects host-parasite relationship should be evaluate so may indicated an...

We report a case of human pulmonary dirofilariasis in female patient 45-years-old, derived from Rio de Janeiro, Brazil. The chest radiologic finding consisted single nodule located on the left lower lobe that simulated lung tumor. Human might be investigated nodules are not malignants and require conclusive diagnosis.

The therapeutic effects of praziquantel (PZQ) against a Schistosoma mansoni isolate derived from Nectomys squamipes (isolate R) and susceptible (BH) were analyzed in Swiss mice by fecal egg counting, adult worm reduction oogram pattern. Infected orally administrated with 62.5 mg/kg (group 1), 125 2), 250 3) 500 4), each dose divided over 3 days (49, 50 51 after infection). data using one-way analysis variance (ANOVA). In regard to R, no eggs observed mg/Kg (p < 0.05), whereas BH excretion...

<h2>Summary</h2> Our work represents the first case report of polycystic echinococcosis co-infection with HIV, hepatitis C virus (HCV), and B (HBV). Structural liver alterations were found to be related parasitic structures necroinflammatory foci (karyopyknosis, karyorrhexis, karyolysis), consistent <i>Echinococcus vogeli</i>. Visceral adipose tissue intrahepatic triglyceride droplets (macrovesicular microvesicular steatosis) indicated abnormal fat anabolism, which probably resulted from...

An investigation was carried out to determine the occurrence of cutaneous and visceral leishmaniasis in urban canine population District Cuiaba, State Mato Grosso. In period from August 1997 July 1998 blood samples 800 dogs were collected, different neighborhoods chosen at random sent Service Parasitology Municipal Institute Veterinary Medicine Jorge Vaitsman, Rio de Janeiro, for examination by indirect immunofluorescent test. At beginning 62 serum processed, which 64.5% (40 samples)...