Atividade de detergentes e desinfetantes sobre a evolução dos ovos de Ascaris lumbricoides

Abstract

Ascaris lumbricoides infection is acquired via ingestion of embryonated eggs of the parasite, thus justifying the search for ovicidal compounds. We studied the effect of 16 household and laboratory detergents and disinfectants on the embryogenesis of this helminth. Children carrying this infection were treated with levamisole. Eliminated female worms were collected and dissected to obtain eggs from the uteri. The eggs were placed in contact with various products at different dilutions and for various periods of time. After washing, eggs were incubated at 28 grades C for 20 days, for viability tests and to determine the embryonation rate. Only one product completely inhibited the embryonation of eggs at every dilution and for every time period tested. Five products inhibited more than 50% of embryonation, while six inhibited less than 50%. Three products showed no effect on embryonation, while for one the percentage of embryonated eggs was higher than in the control tubes.

Ovicidal activity of seven Pochonia chlamydosporia fungal isolates on Ascaris suum eggs

“…Eggs of A. suum and other ascarids contaminate soil, water and foods (Gupta et al 2009). Once these eggs are present in foods they become extremely difficult to be removed because of their ability to adhere to food surfaces (Massara et al 2003). Thus, the knowledge of the biology of free-living stages of this and other gastrointestinal nematodes can help in developing appropriate control programs.…”

Flotation solution influence on the quantification of Ascaris suum eggs in pig feces using McMaster technique

“…Ascaris eggs have great adhesiveness capacity (Massara et al, 2003) because the outermost layer consists of mucopolysaccharides and proteins (Souza et al, 2011). Capizzi & Schwartzbrod (2001) suggested that the surface of Ascaris eggs has hydrophobic characteristics.…”

Enteroparasites in vegetables marketed in an ancient Brazilian city

“…Among the parasites observed in this study, four helminth eggs of the genus Ascaris stand out, one of which was identified as A. lumbricoides. It is known that the eggs of this parasite have a great capacity of adherence to surfaces (27) and, therefore, it is possible to admit the possibility that more eggs, which were not removed during the washing process, could be found in the vegetables.…”