Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Leishmania infecting man and wild animals in Saudi Arabia. 1. General survey.

Abstract

Using up to 13 enzymes, biochemical characterization of 75 isolates of Leishmania made from man, wild animals and sandflies from a wide variety of localities in the Kingdom of Saudi Arabia has revealed the presence of L. major (two similar zymodemes), L. tropica (two zymodemes) and a parasite of the L. donovani-L. infantum complex. Zymodeme LON-4 of L. major has been found in 52 of 53 isolates so far characterized from man, from one specimen of Phlebotomus papatasi, from 15 Psammomys obesus, from one Meriones libycus and from one dog. One isolate from man has been identified as a new variant of L. major. This variant, zymodeme LON-65, varies from zymodeme LON-4 in a single enzyme. While this is the only example of zymodeme LON-65 identified so far, zymodeme LON-4 has also been obtained from Kuwait and Iraq. These are the first reports of L. major in Meriones libycus from Saudi Arabia and the first proven isolate from the dog in any country. L. tropica was identified from only 2 foci, whereas L. major appears to be widely distributed in the Kingdom. Two infants with kala-azar were found to be infected with a parasite apparently identical to zymodeme LON-42 of L. donovani (sensu lato) which also occurs in the highlands of Ethiopia.newline˜AS/D.C. Barker<new para>ADDITIONAL ABSTRACT:<new para>Using up to 13 enzymes, biochemical characterization of 75 isolates of Leishmania from man, wild animals and sandflies from a wide variety of localities in Saudi Arabia, revealed the presence of L. major (2 similar zymodemes), L. tropica (2 zymodemes) and a parasite of the L. donovani-L. infantum complex. Zymodeme LON-4 of L. major was found in 52 of 53 isolates so far characterized from man, and from one Phlebotomus papatasi, 15 Psammomys obesus, one Meriones libycus and one dog. One isolate from man was identified as a new variant of L. major. This variant, zymodeme LON-65, varies from zymodeme LON-4 in a single enzyme. While this is the only example of zymodeme LON-65 identified so far, zymodeme LON-4 has also been obtained from Kuwait and Iraq. These are the first reports of L. major in M. libycus from Saudi Arabia and the first proven isolate from the dog in any country. L. tropica was identified from only 2 foci, whereas L. major appears to be widely distributed in the country. 2 infants with kala-azar were infected with a parasite apparently identical to zymodeme LON-42 of L. donovani (sensu lato) which also occurs in the highlands of Ethiopia.