Ancyclostoma and Necator

515

  • Ancylostoma spp., Necator americanus
    • Characteristics
      • Also known as hookworms
    • Transmission
      • Found in soil contaminated with human feces
        • Larvae penetrate skin of barefoot walkers
    • Pathogenesis and Presentation
      • Skin irritation at site of skin invasion
        • Cutaneous larva migrans
          • Serpiginous tracks of intracutaneous larval migration
      • After entering the foot, migrate via blood to the lungs and through trachea
      • Larvae are swallowed and mature into adult worms in intestinal walls
        • Anemia
          • Caused by worms sucking blood from intestinal walls
      • Eosinophilia
    • Diagnosis
      • Stool microscopy (O&P)
        • Eggs are seen in stool
    • Treatment
      • Bendazoles
      • Pyrantel pamoate