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Candidate Hookworm Vaccine Shows Benefits In Animal Study

Date:
October 8, 2005
Source:
Public Library of Science
Summary:
In a paper in the open access journal PLoS Medicine, vaccination of dogs with a recombinant protease produced by hookworms can reduce blood loss when these dogs are infected with the hookworm Ancylostoma caninum.

Hookworms secrete proteins that are being used as vaccines in animal models.
Credit: Photo : Loukas et al.

Hookworms are intestinal parasites of mammals, including humans, dogs, and cats; in humans these infections are a leading cause of intestinal blood loss and iron-deficiency anemia. Hookworm infections occur mostly in tropical and subtropical climates and are estimated to infect about 1 billion people worldwide-- about one-fifth of the world's population. People who have direct contact with soil that contains human feces in areas where hookworm is common are at high risk of infection; because children play in dirt, they are at the highest risk.

These results set the stage for the next stage of vaccine development in humans. Loukas and colleagues suggest that the ideal hookworm vaccine would be a mixture of two recombinant proteins, targeting both the infective larva and the blood-feeding adult stage (as targeted here) of the parasite. Such a vaccine would limit the amount of blood loss caused by feeding worms and maintain normal levels of hemoglobin.

###

Citation: Loukas A, Bethony JM, Mendez S, Fujiwara RT, Goud GN, et al. (2005) Vaccination with recombinant aspartic hemoglobinase reduces parasite load and blood loss after hookworm infection. PLoS Med 2(10): e295.


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The above story is based on materials provided by Public Library of Science. Note: Materials may be edited for content and length.


Cite This Page:

Public Library of Science. "Candidate Hookworm Vaccine Shows Benefits In Animal Study." ScienceDaily. ScienceDaily, 8 October 2005. <www.sciencedaily.com/releases/2005/10/051007101024.htm>.
Public Library of Science. (2005, October 8). Candidate Hookworm Vaccine Shows Benefits In Animal Study. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2005/10/051007101024.htm
Public Library of Science. "Candidate Hookworm Vaccine Shows Benefits In Animal Study." ScienceDaily. www.sciencedaily.com/releases/2005/10/051007101024.htm (accessed April 18, 2014).

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