《蛔蟲鉤蟲蟯蟲》ppt課件(文件)
【正文】 ncylostma caninum 犬鉤口線蟲 Ancylostma brazilience 巴西鉤口線蟲 Adult live in the intestine and take blood from the host, cause hookworm disease. Number of humans infected is estimated at billion with 50,000 to 60,000 deaths each year. 國內： % Enterobius vermicularis (Pinworm) Almost anybody can bee infected with this parasite，especially children. The worldwide infection is about 210 million 國內： % Morphology Morphology－ Adult of Ascaris lumbricoides the largest nematode parasites of humans Creamy white or pinkish in color elongate and cylindrical Female: measuring 35cm long, posterior end is straight Male: measuring 25cm long， posterior end is curved . Morphology－ Adults of Ascaris lumbricoides Three lips around the mouth in “品” type and possess small teeth Morphology－ Adults of Ascaris lumbricoides 50 mm long with a slender anterior and a thicker posterior end The male is smaller and has a coiled posterior end Morphology－ Adults of Trichuris trichiura Morphology－ Adults of Enterobius vermicularis Adults: pinlike, white, small worm Female showing esophageal bulb amp。m by 2223 181。 N. americanus ml/day b. The worm usually changes its sucking site c. Disfunction of intestine to absorb iron gradually produce an irondeficiency anemia 4. gastroenteric symptoms 胃腸道癥狀 Slight, intermittent abdominal pain 5. Aberration of appetite(geophagy 異嗜癥 ) . loss of normal appetite and desire to eat soil or unnormal materials 6. Hookworm diseases of infant 7. eosinophilia Laboratory Diagnosis Laboratory Diagnosis 1. By identifying the eggs 1. direct fecal smear 2. brinefloatation method （飽和鹽水浮聚法） 3. Scotch tape technique (cellophane tape impression) 透明膠紙黏貼法 4. Larval cultivation (鉤蚴培養(yǎng)法 ) 2. By identifying the adults 3. therapeutic test Epidemiology distribution Basic conditions in parasitic epidemiology Patients and infected persons ? Souce of infection ? Mode of transmission (Factors of prevalence) For round worm For hookworm Via mouth Warmer and poor sanitation Inadequate disposal of feces Using nightsoil as fertilizer Via skin Barefoot walking Others: Oral （ A. doudenale) Placenta Mother’s milk Paratenic host
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