title: Selective elimination of Leptomonas from the in vitro co-culture with Leishmania.
abstract: Leishmania and Leptomonas are protozoan parasites of the family Trypanosomatidae. Leishmania donovani causes the fatal visceral leishmaniasis (VL; kala-azar) in mammals and is transmitted by sand fly vector. Certain VL-cured human populations in India and Sudan develop post kala-azar dermal leishmaniasis (PKDL) due to the same parasite. Although Leptomonas is parasitic mainly in insects, several recent reports on the clinical isolates of L. donovani from VL and PKDL patients in India confirm co-infection of Leptomonas seymouri, probably due to immune suppression in those individuals. Detection of L. seymouri in the in vitro cultures of L. donovani from clinical origin is difficult due to many similarities between L. seymouri and L. donovani. We describe here ways to detect L. seymouri and L. donovani in co-culture. In addition, based on our observation regarding the growth of L. seymouri in different culture conditions, we report here a novel procedure, which can selectively eliminate L. seymouri from the in vitro co-culture with L. donovani. This would be beneficial to researchers who prefer to deal with pure populations of Leishmania parasites for various downstream immunological and genetic studies.
authors.affiliation: Institute of Molecular Medicine, New Delhi India; Department of Research, Sir Gangaram Hospital, New Delhi, India.
authors.forename: Kavita
authors.initials: K
authors.lastname: Ahuja
authors.affiliation: Institute of Molecular Medicine, New Delhi India.
authors.forename: Ginni
authors.initials: G
authors.lastname: Arora
authors.affiliation: Institute of Molecular Medicine, New Delhi India.
authors.forename: Prashant
authors.initials: P
authors.lastname: Khare
authors.affiliation: Institute of Molecular Medicine, New Delhi India; Department of Research, Sir Gangaram Hospital, New Delhi, India. Electronic address: selvapandiyan@immindia.org.
authors.forename: Angamuthu
authors.initials: A
authors.lastname: Selvapandiyan
mesh_terms: D018920:Coculture Techniques; D003470:Culture Media; D006801:Humans; D007893:Leishmania donovani / Q000235:genetics / Q000254:growth & development* / Q000302:isolation & purification*; D010274:Parasitology / Q000379:methods*; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D013696:Temperature; D014351:Trypanosomatina / Q000235:genetics / Q000254:growth & development* / Q000302:isolation & purification*
chemical_list: D003470:Culture Media
keywords: Amastigote; Leishmania; Leptomonas; Promastigote; Selective medium; elimination