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    Rights statement: http://journals.cambridge.org/action/displayJournal?jid=PAR The final, definitive version of this article has been published in the Journal, Parasitology, 105 (2), pp 193-202 1992, © 1992 Cambridge University Press.

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Axenic cultivation and characterization of Leishmania mexicana amastigote-like forms

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<mark>Journal publication date</mark>10/1992
<mark>Journal</mark>Parasitology
Issue number2
Volume105
Number of pages10
Pages (from-to)193-202
Publication statusPublished
Original languageEnglish

Abstract

A new method is described which has made possible the long-term axenic cultivation of Leishmania mexicana amastigote-like forms in Schneider's Drosophila medium supplemented with 20% (v/v) foetal calf serum. Unlike previous methods, it utilizes direct culture of parasites obtained from the lesions of infected animals rather than adaptation of promastigotes in vitro. Ultrastructural (possession of megasomes), biochemical (cysteine proteinase activity and gelatin SDS-PAGE banding pattern) and infectivity (in vivo) data are presented which show the close similarity of the cultured forms to lesion amastigotes. The axenically cultured forms grew optimally at a temperature of 32-33 degrees C, providing further evidence for their amastigote nature. It was found that adjustment of the pH of the growth medium to 5.4 was required in order to retain the amastigote morphology of the cultured parasites. This supports the notion that leishmanial amastigotes are acidophiles.

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http://journals.cambridge.org/action/displayJournal?jid=PAR The final, definitive version of this article has been published in the Journal, Parasitology, 105 (2), pp 193-202 1992, © 1992 Cambridge University Press.