This paper evaluates the alterations in glycogen content of tissues (digestive gland and cephalopedal mass) glucose haemolymph Biomphalaria glabrata BH strain infected with Schistosoma mansoni exposed to latex Euphorbia splendens var. hislopii. A reduction deposits was observed snails not latex. However, exposure caused a greater depletion levels both sites analysed, especially from third week onward. The utilisation as molluscicide control population B. selectively is proposed.

The present study describes the action of latex Euphorbia splendens var. hislopii (E. milli) on species genus Bulinus and Biomphalaria pfeifferi, intermediate hosts schistosomiasis in Africa, Brazilian snails B. glabrata, tenagophila, straminea, Brazil. impact egg masses embryos glabrata was also evaluated. Using standardized methodology World Health Organization for testing plant-derived molluscicides, we obtained a 90% lethal dose (LD90) ranging from 0.13 ppm subjected to lyophilized 4.0...

Molluscides have been used as one of the strategies to control schistosomiasis. Many plant extracts with molluscidal effects tested, but action latex Euphorbia splendens var. hislopii is considered most promising because it meets recommendations World Health Organization (WHO). The objective this study was determine lethal dose and identify different doses E. on physiology Biomphalaria glabrata submitted treatment for 24 h. concentrations glucose, uric acid total proteins in hemolymph...

Following the positive results obtained regarding molluscicidal properties of latex Euphorbia splendens that were corroborated in laboratory and field tests under restricted conditions, a study was conducted experimental streams located an endemic area. After recording average annual fluctuations vectors three streams, solution E. at 12 ppm applied stream A, niclosamide 3 B third (C) remained untreated for negative control. Applications resulted mortality 100% among snails collected A B. No...

Foi estudada a ocorrência de parasitas gastrointestinais em cães recolhidos e mantidos instituto público medicina veterinária no Rio Janeiro, RJ. Amostras fezes frescas foram coletadas março 2004 analisadas pelos métodos flutuação Willis centrífugo-flutuação solução sacarose. De 204 amostras, 45,6% estavam positivas para helmintos gastrointestinais.

The aim of this work was to analyze the content total protein and nitrogen degradation products in Biomphalaria glabrata infected with Schistosoma mansoni exposed Euphorbia splendens var. hislopii latex. LC(50) latex 1.0mg/l. Concentrations uric acid, urea proteins were determined hemolymph B. five S. miracidia a sublethal concentration E. for 24h. exposure molluscicide caused depletion alterative sources energy (total proteins) significant variation products. increased while acid level...

Registrou-se no município de Resende, Estado do Rio Janeiro, Brasil, a primeira ocorrência molusco Achatina fulica hospedeiro intermediário Angiostrongylus cantonensis, causador da angiostrongilíase meningoencefálica. Em cinco bairros visitados, foram encontrados moluscos vivendo livremente, e nenhum dos animais coletados apresentava forma larvar parasito. A presença A. pode estar relacionada à comercialização desse como alimento, representa possibilidade instalação dessa zoonose na região.

Laboratory tests with aqueous solutions of Euphorbia splendens var. hislopii latex have demonstrated seasonal stability the molluscacidal principle, LD90 values 1.14 ppm (spring), 1.02 (fall), 1.09 (winter), and 1.07 (summer) that been determined against Biomphalaria tenagophila in field. Assays on collected Belo Horizonte Recife yielded similar to those obtained reference substance Rio de Janeiro (Ilha do Governador), demonstrating geographic effect. The action dilutions natura, centrifuged...

The reproductive activity of Biomphalaria glabrata exposed to Euphorbia splendens var. hislopii latex was evaluated. Parameters related fecundity and fertility were observed. snails the LD50 (1 mg/l) crude latex. At first week post exposure (p.e.), egg laying reduced. After fourth p.e., an increase number eggs/snail occurred. results showed a marked reduction in hatching snails, revealing interference with process B. E. hislopii. may be used as alternative method control size populations field.

The latex action of Euphorbia splendens var. hislopii (Christ's Crown) against snails Lymnaea columella, intermediate host Fasciola hepatica, derived from irrigation ditches the Station Pisciculture at Universidade Federal Rural do Rio de Janeiro, was studied in laboratory. Lab bioassays, using aqueous solutions latex, varying between 0.1 and 10 mg/l, have proven molluscicidal activity product collected on same day tests were performed, during four seasons year, finding following lethal...

The aim of this study was to determine the toxicity niclosamide (Bayluscide ®) on Melanoides tuberculata and Biomphalaria glabrata under laboratory conditions. latter species is intermediate host Schistosoma mansoni (Sambon 1917). M. successfully used as competitor B. in biological control programs French West Indies. Both molluscicide using have proved be successful reducing population density glabrata. associated use area would an effective measure if were less susceptibility than Three...

The reproductive activity of Biomphalaria glabrata exposed to Euphorbia splendens var.hislopii latex was evaluated.Parameters related fecundity and fertility were observed.The snails the LD 50 (1 mg/l) crude latex.At first week post exposure (p.e.), egg laying reduced.After fourth p.e., an increase number eggs/snail occurred.The results showed a marked reduction in hatching snails, revealing interference with process B. E. var.hislopii.The may be used as alternative method control size...

The complexometric method is usually applied to quantitative calcium determination in different materials; however the application of this molluscs shells infers significant interferences results. snail Bradybaena similaris, a terrestrial gastropod, was used as experimental model improvement method. were calcinated and dissolved nitric acid, hydrogen peroxide also clarify medium after acid addition. calcination procedure use reduced significantly interferences, allowing major degree...

The latex of Euphorbia splendens var. hislopii, at concentrations between 5 to 12 mg/l, kills 100% the population Biomphalaria glabrata in a lentic habitat, after 24 h. lyophilized latex, stocked for 18 months, killed only 34.2% snails, concentration and 96.0% mg/l. No lethal effect was observed among Pomacea haustrum exposed same molluscicide.

The use of the latex Euphorbia splendens var. hislopii was considered as an effective control method for Biomphalaria glabrata in Sumidouro, Rio de Janeiro. However, appearance and expansion snail Melanoides tuberculata since August 1997, with concomitant reduction population B. suggest that competitive exclusion might be taking place. Depending on susceptibility thiarid to E. toxin, natural is occurring could interrupted by employment if planorbid were less susceptible toxin. aim this study...

We report the first finding of Lymnaea cousini naturally infected with Fasciola hepatica in Ecuador. A sample 70 snails was collected April 2005 from a wetland located valley at approximately 3000 m a.s.l., near locality Machachi, Pichincha Province. The prevalence natural infection L. 31.43%, which is highest value ever recorded for lymnaeid species.

Background: Two aspects need to be considered for schistosomiasis control: morbidity and transmission. In this context, many soluble substances have been tested Euphorbia milii latex is one of the most promising Brazilian molluscicides. Phytochemical studies involving simulation applicability on all aquatic forms S. mansoni life cycle are rare in literature. The aim work was evaluate effect E. egg, miracidium different developmental stages Biomphalaria glabrata. Methods: laboratory study...

The latex of Euphorbia splendens var. hispolii in 12 ppm concentration (12 mg/l) caused 100% mortality for a Biomphalaria tenagophila population lotic habitat after 9 hr dripfeed application. For sentinel snails, cages placed at the water surface and buried under 0.10 m, rates varied with distance from application point were: (0 m); 92.6% (50 m) 94.7% (100). No lethal effects were observed other living species this (Pomacea haustrum Poecilia reticulata).

Aqueous solutions of the molluscicidal latex Euphorbia splendens are irritant to rabbit eye in concentrations higher than 0.35% and skin 0.5%. Although this potential does not proclude its use as a molluscicide, special precautions recommended for hanbdling application product hazard tumor-promoting potencial should be carefully investigated before schistosomiasis vector control.

The molluscicidal evaluation of Euphorbia splendens var. hislopii (Crown thorns) against Lymnaea columella snails, intermediate host Fasciola hepatica, in irrigation ditches the Pisciculture Station at Universidade Federal Rural do Rio de Janeiro, was studied under limited field conditions. An aqueous solution latex 5 mg/l tested two (experimental and control ditches), after initial sampling snail population present. Twenty-four hours application product, it verified that 97.4% free L....