[Parasitology Lec] Extraintestinals

• Ancylostoma caninum 


  dog hookworm
• Ancylostoma ceylanicum


  naturally parasitizes cats and wild felines in South-East Asia
• Ancylostoma caninum, Ancylostoma braziliense 


  two other species of hookworms known to infect humans accidentally
• Creeping eruption

  caused by nematode larvae that infect by skin penetration
• larva migrants

  larvae appear to lose their way and wander around aimlessly
• Dracunculus medinensis

  
• Dracunculus medinensis

  Common name: Guinea worm
• Dracunculus medinensis

  Causes: Dracunculosis, dracunculiasis, guinea worm infection
• The adult females of D. medinensis

  usually found in the subcutaneous tissue of the legs, arms and back in man
• The worm was present in tropical Africa, the Middle-East in Arabia, Iraq, Iran, and in Pakistan and India
• Dracunculus medinensis

  female worm: Viviparous
• Definitive host of Viviparous: Man
• Intermediate host of Viviparous: Cyclops (Copepods)
• Infective form of Viviparous

  Third-stage larva present in the hemocele of infected cyclops.
• Modes of transmission for Viviparous

  Humans get infected by drinking unfiltered water containing infected cyclops
• Incubation period of Viviparous

  about 1 year