Rating parasitological contamination and seasonal sand in public parks region of the eastern city of Sao Paulo / Avaliação parasitológica e contaminação sazonal nas areias de parques públicos na região da zona leste da cidade de São Paulo

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

Introduction - In recent decades, have been recurrent in the national and international scientific literature, the finding of contamination of public places open to the community by parasites with zoonotic potential and spreaders of human infections. The geohelminths are parasites that can infect humans, however, to allow for the embryo and thus become infective require a mandatory period in the soil with appropriate conditions, mainly, temperature and humidity. Objectives - To evaluate the soil contamination by geohelminths in public places in the eastern city of Sao Paulo and the influence of seasonal variation on the contamination. Materials and Methods - Ten public parks with playground and frequented by people and animals were randomly selected. For a period of 12 months, were collected approximately 250 grams of soil samples from five different points of each square, using the technique of quartering ABNT were obtained 10 grams of each sample, were processed according to the technique of flotation saturated solution of sodium chloride, for qualification and quantification of parasites. We used the Mann Whitney test to compare the amount of eggs and simple linear regression to assess the correlation between climatic variables. Results - A total of 1800 samples, we observed that 49.7 per cent were positive. Among the parasites found it was noticed the presence of Toxocara spp. (44.2 per cent), Ascaris spp. (33.9 per cent), Hookworms (3.8 per cent), Enterobius spp. (0.6 per cent), Hymenolepis spp (0.4 per cent), Capillaria spp. (0.2 per cent) and Trichuris spp. (0.1 per cent), larvae of nematodes (16.1 per cent), cysts of Balantidium coli (0.5 per cent) and Entamoeba coli (0.2 per cent). The set of climatic variables of precipitation, wind and temperature had strong influence on the recovery of parasite eggs (p = 0.02). Conclusions - The presence of parasitic structures on the ground of public plazas study indicates the potential risk of human infection and transmission of zoonoses to the population, yet it was noted that climate change was prevalent in the frequency of recovery of eggs in soil. The data indicate the need for programs of public awareness and implementation of regulatory guidelines regarding the contamination of public places by parasites

ASSUNTO(S)

praças públicas e zoonoses environmental contamination geohelmintos contaminação ambiental public squares and zoonoses variação climática climatic variation geohelminths

ACESSO AO ARTIGO

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