Biological control of Taenia saginata eggs

Araújo, Juliana Milani; Braga, Fábio Ribeiro; Soares, Filippe Elias de Freitas; Gênier, Hugo Leonardo André

doi:10.2478/s11687-010-0028-5

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…The ovicidal activity of several naturally occurring agents was investigated. A number of studies reported that the fungi Paecolimyces lilacinus and Pochonia chlamydosporia were able to colonize the egg contents of T. saginata and T. taeniaeformis eggs, which led to their destruction [29][30][31][32][33]. It was also reported that lime nitrogen had the most destructive effect on egg survival of all fertilizers tested, with the eggs only surviving for 2 days in this substance; survival in other fertilizers was 2 days in limestone, 10 days in ammonium nitrate with limestone, 3 days in superphosphate substance, 3-7 days in NPK3, 10 days in potash salt and 30-35 days in urea [34].…”

Section: Egg Survivalmentioning

confidence: 99%

The survival and dispersal of Taenia eggs in the environment: what are the implications for transmission? A systematic review

et al. 2021

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Taenia spp. are responsible for a substantial health and economic burden in affected populations. Knowledge of the fate of the eggs of Taenia spp. in the environment and of other factors facilitating the transmission of eggs to intermediate hosts is important for the control/elimination of infections caused by Taenia spp. The aim of this systematic review was to summarize current knowledge of the factors influencing the survival and dispersal of Taenia spp. eggs in the environment. Publications retrieved from international databases were systematically reviewed. Of the 1465 papers initially identified, data were ultimately extracted from 93 papers. The results of this systematic review indicate that survival is favoured at moderate temperatures (0–20 °C). Humidity seems to affect the survival of Taenia spp. eggs more than temperature. Under field circumstances, Taenia spp. eggs have been found to survive for up to 1 year. Taenia spp. eggs are commonly found on vegetables (0.9–30%) and in soil and water samples (0–43%), with their presence posing a risk to the consumer. Invertebrates may act as transport hosts, transferring the infection to an intermediate host, but the importance of this route of transmission is still open to question. Wastewater treatment systems are not capable of entirely eliminating Taenia spp. eggs. Access to surface water and the use of sewage sludge as fertilizer on pastures are important risk factors for bovine cysticercosis. Although information on the survival and spread of Taenia spp. eggs is available, in general the data retrieved and reviewed in this article were old, focused on very specific geographical regions and may not be relevant for other areas or not specific for different Taenia spp. Furthermore, it is unknown whether egg survival differs according to Taenia sp. Future studies are necessary to identify sustainable methods to identify and inactivate parasite eggs in the environment and reduce their spread.

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Section: Egg Survivalmentioning

confidence: 99%

The survival and dispersal of Taenia eggs in the environment: what are the implications for transmission? A systematic review

et al. 2021

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“…The ovicidal capacity of P. chlamydosporia has already been described for Dipylidium caninum (reduction of 92.2% and 88.4% for isolates VC1 and VC4), Taenia taeniaeformis (73.8% of type 3 lytic effect for isolate VC4), T. saginata (reduction of 54.2% and 42.4% for isolates VC1 and VC4), and Anoplocephala perfoliata (reduction of 71.17% for isolate VC1) [ 33 , 34 , 35 ]. The results for the reduction in the number of eggs are shown in Table 2 .…”

Section: Resultsmentioning

confidence: 99%

Efficiency of Experimental Formulation Containing Duddingtonia flagrans and Pochonia chlamydosporia against Moniezia expansa Eggs

Ribeiro,

de Almeida Moura,

e Silva

et al. 2023

Pathogens

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This study aimed to evaluate the effectiveness of the experimental formulation containing chlamydospores of Duddingtonia flagrans and Pochonia chlamydosporia fungi, against Moniezia expansa. Two experiments were carried out. The first experiment evaluated the in vitro efficacy using 1 g of the experimental formulation (V1) added to 100 M. expansa eggs and the control (V2) (without the fungal formulation). Intact eggs or eggs with alterations were counted in order to evaluate their effectiveness. The second experiment evaluated the action of the fungal formulation on M. expansa eggs after passing through the gastrointestinal tract of goats. Three groups were identified as B1, B2, and B3, which received 1.0, 1.5 g of experimental fungal formulation, and placebo, respectively. In experiment 1, all the eggs in V1 were subjected to the predatory action of fungi, while in V2, the eggs remained intact. In experiment 2, the reduction of eggs in groups B1 and B2 were 49% and 57% 24 h after ingestion, 60% and 63% 48 h after, and 48% and 58% 72 h after. The predatory capacity against M. expansa eggs shown in the tests demonstrated that experimental fungal formulation has the potential to be used on integrated helminth control programs.

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“…That way, studies that might mimic these fungi environment, in this case the fecal environment, are important. Moreover, according to Araújo et al (2010) predatory and ovicidal nematophagous fungi are generally saprophytic and therefore should be routinely tested under experimental conditions in order to prove its predatory activity in adverse conditions. Present results obtained can be compared to what is already known in the literature, being that: Lysek (1976) reported that fungi may be considered as ovicidal if it presents type 3 effect-destruction of eggs.…”

Section: Discussionmentioning

confidence: 99%

Biological control of Ascaris suum eggs by Pochonia chlamydosporia fungus

et al. 2011

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Ascaris suum is a gastrointestinal nematode parasite of swines. The aim of this study was to observe Pochonia chlamydosporia fungus on biological control of A. suum eggs after fungus passage through swines gastrointestinal tract. Eighteen pigs, previously dewormed, were randomly divided into three groups: group 1, treated with the fungus isolate VC4; group 2, treated with the fungus isolate VC1 and group 3 did not receive fungus (control). In the treated groups, each animal received a 9 g single dose of mycelium mass containing P. chlamydosporia (VC1 or VC4). Thereafter, animal fecal samples were collected at the following intervals: 8, 12, 24, 36, 48, 72 and 96 h after treatment beginning and these were poured in Petri dishes containing 2% water-agar culture medium. Then, 1,000 A. suum eggs were poured into each dish and kept in an incubator at 26 °C and in the dark for 30 days. After this period, approximately 100 eggs were removed from each Petri dish and morphologically analyzed under light microscopy following the ovicidal activity parameters. The higher percentage observed for isolated VC4 eggs destruction was 57.5% (36 h) after fungus administration and for isolate VC1 this percentage was 45.8% (24 h and 72 h) (p > 0.01). P. chlamydosporia remained viable after passing through the gastrointestinal tract of swines, maintaining its ability of destroying A. suum eggs.

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Biological control of Taenia saginata eggs

Cited by 8 publications

References 14 publications

The survival and dispersal of Taenia eggs in the environment: what are the implications for transmission? A systematic review

The survival and dispersal of Taenia eggs in the environment: what are the implications for transmission? A systematic review

Efficiency of Experimental Formulation Containing Duddingtonia flagrans and Pochonia chlamydosporia against Moniezia expansa Eggs

Biological control of Ascaris suum eggs by Pochonia chlamydosporia fungus

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