TAENIA SOLIUM The armed scolex of T. solium (note hooks on top of scolex). The adults (length 2 to 7 m; less than 1,000 proglottids; longevity up to 25 years) develop not only in humans but also some other animal species (monkeys, hamsters). CHAPTER 1: BIOLOGY OF TAENIA SOLIUM, TAENIA SAGINATA AND TAENIA SAGINATA ASIATICA 1 1. Man is considered as the definite host and pig is considered as intermediate host. Morphology 1 1.2. Taenia - two species infect humans (1) Life cycle (a) infective eggs (from human feces) are ingested by a suitable intermediate host (cow or pig). Life cycles 5 1.3. Taeniasis is the infection of humans with the adult tapeworm of Taenia saginata or Taenia solium. T solium has a Figure 1: Life cycle of Taenia solium scolex with four suckers and a double crown of hooks, a narrow neck, and a large strobila measuring 2–4 m and intestine.4 Taeniasis is characterised by mild symptoms or consisting of several hundred proglottids (figure 2). A few attempts to infect nonhuman primates with T. saginata were unsuccessful, but T. solium was able to mature in lar gibbons (Hylobates lar). IN PAKISTAN LIFE CYCLE CLINICAL FEATURES DIAGNOSIS TREATMENT PRECAUTIONS AND CONTROL CONTENTS . Introduction 11 2.2. This organism also developed into tapeworms in chacma Systematics 7 1.4. Humans develop taeniasis when they ingest undercooked pork meat containing cysticerci. Taenia commonly lives in the intestine of humans who consume pork. Taenia solium eggs can also cause cysticercosis. Life Cycle Definitive host – man Stage leaving the body – gravid proglottids, occasional embryonated eggs Intermediate host – pigs and man Infectious stage for the definitive host – infectious eggs for cysticercosis, cysticerci for tapeworm infection Adult worms are rarely pathogenic but the encysted larval stage (cysticercus cellulosae) of the worm caused a serious disease in … CDC• T. solium has a scolex (A) with four suckers and a double crown of hooks, a narrow neck, and a large strobila (2-4 m) (B) consisting of several hundred proglottids.• Most localize & encyst in muscle. It is a flat-ribbon like tape worms that causes intestinal taeniasis. Natural history and disease 12 2.2.1. Taenia solium commonly known as the pork tapeworm or the armed tapeworm. Introduction 1 1.1. Request PDF | Taenia solium: Biological Characteristics and Life Cycle | Taenia solium is one of the many species of cestodes (tapeworms) that can infect humans (Flisser 1994; Pawlowski 2002). Taenia saginata, T. solium and T. asiatica (cysticercosis) Humans are the definitive hosts for T. saginata, T. solium and T. asiatica. This parasite completes its life cycle in two different vertebrate hosts namely man and pig. So it is also called as pork tapeworm. The life cycle of Taenia solium. The pork tapeworm, Taenia solium, is a parasite of humans and pigs. (b) onchosphere hatches and penetrates the intestinal mucosa of the intermediate host. Host immune responses 8 CHAPTER 2: CLINICAL CYSTICERCOSIS: DIAGNOSIS AND TREATMENT 11 2. It is delivered to various parts of body via the circulatory or lymphatic systems. CYSTICERCOSIS/TAENIASIS LIFE CYCLE Causal Agents: The cestodes (tapeworms) Taenia saginata (beef tapeworm) and T. solium (pork tapeworm).

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