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بسمه تعالی دانشگاه علوم پزشکی اصفهان – دانشکده پزشکی – گروه انگل شناسی و قارچ شناسی راسته تریکوراتا Order :Trichurata دکتر عباسعلی اسکندریان.

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Presentation on theme: "بسمه تعالی دانشگاه علوم پزشکی اصفهان – دانشکده پزشکی – گروه انگل شناسی و قارچ شناسی راسته تریکوراتا Order :Trichurata دکتر عباسعلی اسکندریان."— Presentation transcript:

1 بسمه تعالی دانشگاه علوم پزشکی اصفهان – دانشکده پزشکی – گروه انگل شناسی و قارچ شناسی راسته تریکوراتا Order :Trichurata دکتر عباسعلی اسکندریان

2 راسته تریکوراتا : Order Trichurata تمام اعضای این راسته دارای سلولهای مشخصی در ناحیه مری بنام سلول های استیکوسیت هستند از نظر اندازه به دو دسته : 1- کاملا ماکروسکوپی (3-5 س X 1 س ) ، بدن دارای دو قسمت متمایز و نامتناسب از نظر ضخامت : خانواده تریکوریده – جنس : تریکوریس، تنها گونه انسانی :Trichuris trichiura (Trichocephal) X 25 2- کاملا میکروسکوپی (1000 میکرون × 40 میکرون ) ، طول بدن تقریبا ضخامت یکسان دارند X 1000 خانواده های : تریشینلیده Family Trichinellidae Genus: Trichinella T.spiralis و کاپیلاریا Family Capilaridae C. philipinensis C. hepatica

3 Family Trichuridae - Whipworms Morphology : thick relatively short, posterior end with long thread - like anterior end, whip like in appearance (Trichocephalus) thread-head used in some texts.

4 Trichuris trichuria Whipworm Definitive Host: Humans – Dogs possibly Intermediate Host: None – Pigs and chickens are transport hosts – Flies will transport eggs on legs Geographic distribution: Cosmopolitan, including southern U.S. – Warm Climate – High rainfall – Unsanitary conditions

5 Trichuris trichuria Location: large intestine from cecum and appendix to rectum – Burrows head into mucosa Transmission: Ingestion of embryonated eggs, usually in contaminated food – Requires high humid, warm climate and shade to develop properly.

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9 تریکوسفال نر 20×

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12 کرم های تریکوسفال نر و ماده

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15 Life Cycle of Trichuris trichiura Adults in large intestines Eggs go out in feces Embryonate in soil Eggs eaten by humans Eggs hatch Juvenile penetrate mucosa Juvenile mature Emerge into lumen

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17 Diagnosis and Prevention Diagnosis - presence of egg or worm in stool These are easy to distinguish Prevention – Proper sanitation in feces disposed and hand washing – Trichuris vulpis common whipworm of dogs of this area. It can infect humans.

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19 Trichuris trichiura Diagnosis: bipolar eggs in feces. Colonoscopy can also uncover worm infections Treatment: Mebendazole or albendazole. Rectal prolapse treated with surgery

20 Pathology Usually asymptomatic if few worms. (<100) Heavy infection variety of symptoms. – anemia - hemorrhage of digestive tract – secondary bacterial infection – Prolapse rectum – possible cause of appendicitis

21 Trichuris trichiura Pathology and Symptoms: Low- level infections (<100 worms) are asymptomatic Large infections can result in diarrhea, bloody stool, abdominal pain and rectal prolapse Chronic infections in children can lead to growth retardation and finger and toe clubbing. Often associated with Ascaris lumbricoides infections. – Mode of transmission same

22 Epidemiology Poor sanitation-human feces deposited in soil Physical conditions allowing worm development in soil – warm climate – high rainfall high humidity – moisture retaining soil (clay soil) – shade


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