Destruição de ovos de Toxocara canis pelo fungo nematófago Pochonia chlamydosporia

Frassy, Luiza Neme; Braga, Fábio Ribeiro; Silva, André Ricardo e; Araújo, Jackson Víctor de; Ferreira, Sebastião Rodrigo; Freitas, Leandro Grassi de

doi:10.1590/s0037-86822010000100024

Cited by 29 publications

(20 citation statements)

References 8 publications

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“…Carvalho et al (2010) showed that P. chlamydosporia isolates grown in 2% WA were effective in destroying T. canis eggs using time intervals of 7, 14 and 21 days, with ovicidal activity of 20.3% (VC1) and 21.7% (VC4) at the end of the experiment. Frassy et al (2010) used the same isolates of P. chlamydosporia fungus on T. canis eggs and registered percentage values for type 3 effect of 43.3% and 47.3%, respectively, after 15 days.…”

Section: Introductionmentioning

confidence: 99%

Predatory activity of chlamydospores of the fungusPochonia chlamydosporia on Toxocara caniseggs under laboratory conditions

Araújo

Braga

et al. 2013

Rev. Bras. Parasitol. Vet.

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The objective of this study was to use chlamydospores of the fungus Pochonia chlamydosporia (isolates VC1 and VC4) against Toxocara canis eggs in a 15-day in vitro assay. One thousand T. canis eggs were placed in Petri dishes containing 2% water agar medium with different concentrations of chlamydospores (1,000, 10,000 or 100,000) of each fungal isolate of P. chlamydosporia (treated groups) and 1,000 eggs in Petri dishes without fungus (control group). Egg counts were performed to determine the ovicidal activity, which was classified as three effect levels: type 1, type 2 and type 3. Significant differences (P < 0.01) in egg destruction were found in comparison with the control group. The highest percentage of egg destruction was found in plates containing 100,000 chlamydospores (68.5% for VC1 and 70.5% for VC4). Chlamydospores of P. chlamydosporia were effective in destroying T. canis eggs and may contribute in the future towards combating the eggs of this parasite.

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Section: Introductionmentioning

confidence: 99%

Predatory activity of chlamydospores of the fungusPochonia chlamydosporia on Toxocara caniseggs under laboratory conditions

Araújo

Braga

et al. 2013

Rev. Bras. Parasitol. Vet.

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“…Nos humanos, o Ancylostoma braziliense e o Ancylostoma caninum são responsáveis pela patologia denominada larva migrans cutânea, doença caracterizada por erupções lineares serpiginosas progressivas que se prolongam pelo tecido subcutâneo causada pela migração das larvas de terceiro estádio (L 3 ) destes vermes, que permanecem no solo durante semanas ou meses 4 . Dessa forma, métodos de prevenção e alternativas de controle de geo-helmintos que sejam implantados para reduzir a contaminação ambiental das formas infectantes e de seus ovos são importantes 5 .…”

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“…De acordo com Esteves e cols 7 , alguns trabalhos têm demonstrado que isolados fúngicos de Pochonia chlamydosporia são capazes de produzir extratos enzimáticos contra vários tipos de substratos sólidos, e dentre esses, os polissacarídeos, as proteínas e os lipídios. Além disso, sua ação ovicida tem sido testada com sucesso contra ovos de vários gêneros de geo-helmintos em condições laboratoriais e a campo 5,8 . Contudo, seu extrato bruto enzimático nunca foi testado sobre ovos de geo-helmintos, e dentre esses de Ancylostoma sp, constituindo dessa forma, uma alternativa de controle.…”

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Ação ovicida do extrato bruto enzimático do fungo Pochonia chlamydosporia sobre ovos de Ancylostoma sp

Braga

Araújo

Silva

et al. 2011

Rev. Soc. Bras. Med. Trop.

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INTRODUÇÃO: Ancylostoma sp é um geo-helminto potencialmente zoonótico. MÉTODOS: O objetivo deste trabalho foi avaliar in vitro a ação do extrato bruto enzimático de Pochonia chlamydosporia (VC4) sobre ovos de Ancylostoma sp, em meio ágar-água 2% e em cultura de fezes. RESULTADOS: Observou-se um percentual de redução na eclosão dos ovos de Ancylostoma sp, de 76,8% na placas de Petri do grupo tratado em relação ao grupo controle. CONCLUSÕES: O extrato bruto enzimático de Pochonia chlamydosporia foi eficiente na redução da eclosão dos ovos de Ancylostoma sp, podendo ser utilizado como controlador biológico desse nematoide.

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“…Various strategies are employed in combating the taeniasis-cysticercosis complex, though the main being interrupting the parasites' biological evolution cycle (Organización Panamericana de La Salud, 1994). In this context, it means using nematophagic fungi controlling biologically infective eggs in the soil, thus controlling the development, permanence and subsequently their destruction Frassy et al, 2010). Nematophagic fungi could be predators, endoparasites or ovicidic in relation to the eggs of Taenia saginata.…”

Section: Introductionmentioning

confidence: 99%

Biological control of Taenia saginata eggs

et al. 2010

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189 SummaryTaenia saginata, is a cestode with zoonotic potentially. The objective of this work was to evaluate the ovicide activity (type 3 effect) of the fungus, Paecilomyces lilacinus (PL1), on the eggs of Taenia saginata, in vitro. The eggs were inverted in Petri dishes containing PL1, or in Petri dishes without the fungus (control). After 5, 10, or 15 days, we extracted approximately 100 eggs for evaluation and for classifying the ovicide activity. At the end of the 15 days of interaction, a significant difference (p < 0.05) due to the ovicide activity of PL1, was noted in relation to the control group, with a medium percentage (type 3 effect) at 24.6 %. These results show that the fungus, P.lilacinus (PL1), destroyed the eggs of T. saginata, suggesting its biological control potential of the eggs of this cestode.

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Destruição de ovos de Toxocara canis pelo fungo nematófago Pochonia chlamydosporia

Cited by 29 publications

References 8 publications

Predatory activity of chlamydospores of the fungusPochonia chlamydosporia on Toxocara caniseggs under laboratory conditions

Predatory activity of chlamydospores of the fungusPochonia chlamydosporia on Toxocara caniseggs under laboratory conditions

Ação ovicida do extrato bruto enzimático do fungo Pochonia chlamydosporia sobre ovos de Ancylostoma sp

Biological control of Taenia saginata eggs

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