出版社：Pontifícia Universidade Católica do Rio Grande do Sul
摘要：Objective: To evaluate the contamination of lettuces (Lactuca saliva) with parasites of Public Health peculiar interest sold in Lages, Santa Catarina. Materials and Methods: A nonprobabilitic intentional sampling method was used, in which eight supermarkets and two public markets were selected according to their scope of activity and sales volume for the town. The 122 samples obtained from eight supermarkets and from two open-air markets were analyzed by the techniques of spontaneous sedimentation (Lutz), centrifugation and fluctuation in zinc sulphate (Faust), centrifugation and fluctuation in sucrose solution (Sheather) and modified Ziehl Neelsen coloration. Results: The total parasitism rate was 88.5% (108/122), 77% (94/122) in the supermarkets samples and 11.5% (14/122) in the open-air markets samples. The Lutz technique has detected 46.7% (57/122) infected lettuces; Sheather and Faust technique identified 31.1% (38/122) and 10.6% (13/122) of lettuces infected with eggs and/or oocysts of parasites, respectively. The Eimeria, Giardia e Entamoeba were the most prevalent genders. Conclusions: The analyzed samples presented low hygienic standards, showing that more intense sanitary inspection is needed during all stages of vegetable productive process.
