Cross-immunity experiments between different species or strains of Leishmania in rhesus macaques (Macaca mulatta).
This study evaluates cross-immunity in rhesus monkeys (Macaca mulatta) previously infected with one species of Leishmania and have had self-cured disease or were cured by antimony-based therapy upon development of full-blown disease. We found that a self-healing cutaneous leishmaniasis (CL) following experimental infection with Leishmania (Leishmania) major induces significant protection for L. (L.) amazonensis and L. (Viannia) guyanensis, and was dependent on time of re-challenge by L (L.) amazonensis after animals had recovered from primary lesions, but lacked protection against L. (V.) braziliensis. In contrast, monkeys that recovered from L. (V.) braziliensis CL or L. (L.) chagasi visceral leishmaniasis following chemotherapeutic intervention were protected by challenge with L. (V.) braziliensis and L (L.) amazonensis. These findings indicate the relative variability in protection after self-cure or drug-cured experimental leishmaniasis to challenge by heterologous leishmanial parasites. Further studying the immune response may provide information regarding relevant factors influencing cross-protective immunity.
Porrozzi
Renato
R
Departments of Immunology and Ultrastructural and Cell Biology, Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro, Brazil.
Teva
Antonio
A
Amaral
Veronica F
VF
Santos da Costa
Marcos V
MV
Grimaldi
Gabriel
G
D000818:Animals; D000981:Antiprotozoal Agents / Q000627:therapeutic use; D003429:Cross Reactions / Q000276:immunology*; D004198:Disease Susceptibility / Q000276:immunology*; D005260:Female; D007109:Immunity / Q000276:immunology; D007891:Leishmania / Q000145:classification / Q000276:immunology*; D007896:Leishmaniasis / Q000188:drug therapy / Q000276:immunology* / Q000469:parasitology; D008253:Macaca mulatta; D008297:Male; D023421:Models, Animal; D012075:Remission, Spontaneous
D000981:Antiprotozoal Agents