Isolation of viable Toxoplasma gondii cysts from brain samples for oral infection.

Abstract:

AIM:A method was developed to separate contaminant-free viable Toxoplasma gondii cysts from brain samples of infected mice for molecular biology studies and reinfection. MATERIALS AND METHODS:The mice brains were homogenized and washed with phosphate buffered saline (PBS) Tween 80 prior to fractionation using 19-22% dextran solution. Finally, the supernatant was purified by two-step membrane filtration (100-160 microm and < 10 microm) to obtain pure T. gondii cyst. The isolates were analyzed through microscopic observation, qPCR and by reinfection of new batch of mice. RESULTS:T. gondii cysts were best isolated with 21% dextran solution and two step filtration. CONCLUSIONS:The method was observed not to disrupt the integrity of the cysts containing bradyzoites. In addition, the isolated cysts in the filtrate were found to be contaminant-free, viable and able to infect healthy mice when introduced orally; which, mimics the natural infectivity pathway.

authors

Puvanesuaran VR,Ibrahim N,Noordin R,Balakrishnan V

subject

Has Abstract

pub_date

2012-09-01 00:00:00

pages

1179-83

issue

9

eissn

1128-3602

issn

2284-0729

journal_volume

16

pub_type

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