Cyclophyllidea Taenia saginata Taenia solium Echinococcus granulosus Echinococcus
- Slides: 30
Cyclophyllidea • • Taenia saginata Taenia solium Echinococcus granulosus Echinococcus multilocularis Hymenolepis diminuta Hymenolepis nana Dipylidium caninum
Taenia saginata • Beef tapeworm • Get infected by eating beef • 3 -5 meters (20 meters)
Human eats cysticerci with muscle. Scolex evaginates and attaches to small intestine Adults in intestine. Gravid proglottids shed in feces. Proglottid degrades and eggs released Bovid eats egg. Oncosphere hatches, penetrate mucosa and enter blood stream. Go to muscle and develop into a cysticercus
Taenia saginata Pathogenesis • • • Not very pathogenic Worm produces antigens = allergic reaction Abdominal discomfort Diarrhea Nausea Abdominal Pain Dizziness Loss of apetite Obstruction of intestine if intensity is high
Taenia saginata Diagnosis and Treatment • Look for _______ in feces. • ELISA • Praziquantel
Epidemiology • How do you get infected? • How do bovids get infected?
Taenia solium
Taenia solium • Pork tape worm • Most dangerous cestode? – Humans are • Definitive hosts • Intermediate hosts • Cosmopolitan – – – Mexico Central America South America India China Asia
Taenia solium
Human eats cysticerci with muscle. Scolex evaginates and attaches to small intestine. Adults in intestine. Gravid proglottids shed in feces. Proglottid degrades and eggs released Pig eats egg. Oncosphere hatches, penetrate mucosa and enter blood stream. Go to muscle and develop into a ______
Adults in intestine. Gravid proglottids shed in feces. Proglottid degrades and eggs released Dead End Human eats egg. Oncosphere hatches, penetrate mucosa and enter blood stream. Go to muscle and develop into a ______
Pathogenesis • Adults – Not serious • Cysticerci – Cysticercosis – Establish in many tissues • • Connective tissues Brain Eye Muscles Heart Liver Lungs
Human muscular cysticercosis
Human Neurocysticercosis and Ophtalmocysticercosis
Cysticercosis • Seriousness depends on – Location – Number – Immune response • Fibrosis • Damage to eye • Brain – – – • • • Epilepsy Nervous system malfunction Blindness Paralysis Disorientation Mechanical Pressure Cysticerci begin to degenerate Inflammatory response – Brain – eye
Diagnosis • • Look for _______ in feces. ELISA MRI X-rays
Eggs • Eggs with well developed hexacanth and striated embryophore; 35 -40 x 30 -32 µm.
Treatment and Prognosis • Niclosamide – Only acts on adults • Praziquantel – – – Can kill cysticerci Death elicits immune response Brain: Seizures Is this worse than natural progression? Steroids • Surgery
Epidemiology • How does a human get infected with adults? • How does a human get infected with cysticerci? • Autoinfection
Santo Domingo, a rural community in the state of Yucatan.
Pigs acquire cysticercosis because….
Pigs acquire cysticercosis because….
Pigs acquire cysticercosis because….
Swine cysticercosis
Differential Diagnosis • Taenia solium and Taenia saginata • Importance? 7 -13 15 -20
Statistics • Epilepsy – 1. 7% Ecuador – 2. 1% Columbia – 3. 7% Nigeria • 6 times higher than developed nations • Mexico – 12% neurological hospital beds
Economic Cost • $15 million Mexico for hospital admission • Pork industry Mexico – $43 million in meat loss
Taenia solium • Emerging Infectious Diseases March 2004 Oregon California 1995 -2000 1989 -2000 # Cases 43 ? # Deaths 6 124 Born in Mexico 72% 72. 6% % from US 18% 14% Age at death 33 39. 9 Years
- Platyhelminthes
- Alveococcosis carrier
- Echinococcus granulosus ciclo de vida
- Cestides
- Echinococcus granulosus common name
- Diferencia entre tenia saginata y solium
- Desenvolvimento indireto exemplos
- Taenia solium
- Pantljicara slike
- Cestides
- Taenia solium
- Taenia saginata
- Genital atrium
- Taenia saginata egg
- Daur hidup fasciola hepatica
- Taenia hydatigena
- Taenia saginata
- Alat hisap turbellaria
- Taenia saginata kingdom
- Taenia saginata
- Cysticercus cellulosae
- Cacing tambang
- Exvaginates
- Proglotides
- Zinc sulphate centrifugal flotation technique
- Siklus hidup taenia solium
- Daur hidup fasciola hepatica
- Tipos de protozoarios
- Morphology of taenia solium
- Cnidaria
- Autofecundação