Skip to main content
Log in

Skin penetration byNecator americanus larvae

  • Original Investigations
  • Published:
Zeitschrift für Parasitenkunde Aims and scope Submit manuscript

Abstract

Skin penetration byNecator americanus larvae has been investigated in vitro. Larvae were able to penetrate completely human skin from both the epidermal and dermal directions; their passage through the epidermis was marked by cellular destruction. Removal of chloroform soluble skin lipids affected both the percentage of larvae invading and the percentage exsheathing. The larvae released an enzyme at about 37°C, which showed peak activity against azocoll at 37°C and pH 8. It is suggested that initial invasion is a mechanical process and that the enzyme is functional in passage through the germinal layers of the epidermis.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  • Clegg JA (1969) Skin penetration by cercariae of the bird schistosomeAustrobilharzia terrigalensis: the stimulatory effect of cholesterol. Parasitology 59:973–989

    Google Scholar 

  • Croll NA, Matthews BE (1973) Activity, ageing and penetration of hookworm larvae. Parasitology 66:279–289

    Google Scholar 

  • Croll NA Matthews BE, Smith JM (1975) Hookworm behaviour: larval movement patterns after entering hosts. Int J Parasitol 5:551–556

    Google Scholar 

  • Gordon RS, Cage GW (1966) Mechanism of water and electrolyte secretion by the eccrine sweat gland. Lancet 1:1246–1250

    Google Scholar 

  • Jenkinson D, McEwan (1980) The topography, climate and chemical nature of the mammalian skin surface. Proc R Soc. Edinb 79B:3–22

    Google Scholar 

  • Lee DL (1972) Penetration of mammalian skin by the infective larva ofNippostronglylus brasiliensis. Parasitology 65:499–505

    Google Scholar 

  • Lewert RM, Lee CL (1954) Studies on the passage of helminth larvae through host tissues. I. Histological studies on the extracellular changes caused by penetrating larvae. II. Enzymatic activity of larvae in vitro and in vivo. J Infect Dis 95:13–51

    Google Scholar 

  • Mandl I, MacLennan JD, Howes EL (1953) Isolation and characterization of proteinase and collagenase fromCl. histolyticum. J Clin Invest 32:1323–1329.

    Google Scholar 

  • Matthews BE (1972) Invasion of skin by larvae of the cat hookwormAncylostoma tubaeforme. Parasitology 65:457–467

    Google Scholar 

  • Matthews BE (1975) Mechanism of skin penetration byAncylostoma tubaeforme larvae. Parasitology 70:25–38

    Google Scholar 

  • Matthews BE (1977) The passage of larval helminths through tissue barriers. Symp Brit Soc Parasitol 15:93–119

    Google Scholar 

  • Rothman S (1954) The Physiology and Biochemistry of the skin. University of Chicago Press

  • Smith JM (1976) Comparative ultrastructure of the oesophageal glands of third stage larval hookworms. Int J Parasitol 6: 9–13

    Google Scholar 

  • Stirewalt MA (1963) Chemical biology of secretions of larval helminths. Ann NY Acad Sci 113:36–53

    Google Scholar 

  • Stirewalt MA (1966) Skin penetration mechanisms of helminths. In: ‘Biology of Parasites’. EJL Soulsby (Ed) London & New York, Academic Press

    Google Scholar 

  • Stirewalt MA (1971) Penetration stimuli for schistosome cercariae. In ‘The Biology of Symbiosis’. TC Cheng (Ed) London Butterworths

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Matthews, B.E. Skin penetration byNecator americanus larvae. Z. Parasitenkd. 68, 81–86 (1982). https://doi.org/10.1007/BF00926660

Download citation

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00926660

Keywords

Navigation