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  • Title: Pathophysiology of experimental leishmaniasis: pattern of development of metastatic disease in the susceptible host.
    Author: Hill JO.
    Journal: Infect Immun; 1986 May; 52(2):364-9. PubMed ID: 3699885.
    Abstract:
    A clear understanding of the etiology of the various forms of leishmaniasis will require knowledge of how physiological properties of the parasite and host immunity influence the pattern of development of the disease. Of particular importance are how these factors affect the growth rate of Leishmania spp. at the site of inoculation in the skin, their capacity to disseminate to visceral and distant cutaneous sites, and their capacity to multiply once there. This paper details the pattern of development of disseminated Leishmania major infection in susceptible BALB/c nu/+ and BALB/c nu/nu mice. It was found that the parasite disseminates from the hind footpad to distant cutaneous sites soon after metastatic foci are established in the liver and spleen. Both mononuclear phagocytes and neutrophils may be the vehicles for the transport of the parasite in the blood. Once visceral and cutaneous metastases are established, the parasites in those foci increase in number progressively. L. major has the capacity to multiply at visceral and cutaneous sites at the same rate. Despite the presence of viable parasites in a number of skin sites, cutaneous metastatic lesions developed almost exclusively on the feet and the tail. Furthermore, these lesions appeared to develop preferentially at sites near joints, suggesting that factors other than temperature may influence the development of cutaneous metastatic lesions.
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