Ascaris lumbricoides the parasitic diseases are pointed, mainly, as indicating of socioeconmico development of a country and a frequent problem of public health having unchained, beyond gastrointestinal problems, low corporal income and consequent delay in the pertaining to school income (PINE et al., 2007). In our country, the number of individuals with some type of enteroparasitose sabidamente is mainly raised in peditricas populations (0-5 years) and children in pertaining to school age (SAINTS et al., 2006). The Ascaridase is the most frequent parasatism human being (REY, 2001). The Ascaris lumbricoides, parasite nematelminto of the classroom of nematides, known as ‘ ‘ lom-briga’ ‘ , cause intestinal in human beings, in general assintomtica infection or with few symptoms, as abdominal, diarria pain, vomits and anorexy. In massive infections it can cause important complications, as nutricional deficiency, pneumonite, blockage intestinal and of the ductos pancretico and biliary, among others, some fatal times (IN-NOCENTE et al.

; 2008). 1.2.Morfologia the study of the morphology of this parasite must be made observing the evo-lutivas phases of its biological cycle, that is, the adult worms male and female (Figure 1) and the fertile and infertile eggs (Figure 2). It is important to remember that the size of the units of. the lumbricoides ones is in the dependence of the number of lodged parasites and the nutricional state of the host (SNOWS et al. ; 2008). – Male: When adult, the 30 cm of length measures about 20 and presents milky color. The mouth or buccal vestibule is located in the previous extremity, and is contouring for three strong lips with milling of dentices and without interlbios. The mouth, follows muscular esophagus e, then after, the rectilinear intestine. The rectum is found next to the posterior extremity. It presents filiform testicule and enovelado, that if it differentiates in deferential canal, continues for the ejaculador canal, confiding in the cloaca, located next to the posterior extremity.

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