Effect of Chlorine on Giardia lamblia Cyst Viability

Inactivation of Giardia lamblia and Giardia canis cysts by combined and free chlorine.

Free chlorine and a combined organic N-chloramine (3-chloro-4,4-dimethyl-2-oxazolidinone, compound 1) were compared for efficacy as disinfectants against an admixture of cysts of Giardia lamblia and Giardia canis in water solution under a variety of test conditions; variables were pH, temperature, and water quality. In general, compound 1 was found to reduce the giardial excystation in the solu...

Identification and localization of cyst-specific antigens of Giardia lamblia.

We induced Giardia lamblia trophozoites to encyst in vitro by exposure to conditions which are specific to the human small intestinal milieu. We now show that encystation entails the appearance of two new groups of antigens detected in Western blots by rabbit antiserum against cysts which had been purified from human feces. A heterodisperse group of lower-molecular-mass antigens (approximately ...

Giardia Lamblia.

Comparison of Giardia lamblia and Giardia muris cyst inactivation by ozone.

Inactivation of Giardia lamblia and Giardia muris cysts was compared by using an ozone demand-free 0.05 M phosphate buffer in bench-scale batch reactors at 22 degrees C. Ozone was added to each trial from a concentrated stock solution for contact times of 2 and 5 min. The viability of the control and treated cysts was evaluated by using the C3H/HeN mouse and Mongolian gerbil models for G. muris...

Effect of Cecropin–melittin Chimeric Peptide (CM11) on Trophozoite of Giardia lamblia In Vitro

Background and purpose: Antimicrobial peptides (AMP) are one of the most diverse antimicrobial compounds that have received much attention due to the development of drug resistance of pathogens to conventional antibiotics. But, few studies have evaluated anti-parasitic properties of AMP. The present study was conducted to compare the effect of a cecropin–melittin chimeric peptide (CM11) and met...