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Protective potential of L. acidophilus in murine giardiasis

100%

Shukla G. , Kaur T. , Sehgal R. , Rishi P. , Prabha V.

nr 4

456-463

This study describes the in vivo activity of Lactobacillus acidophilus in Giardia lamblia infected BALB/c mice. Experimentally, it was observed that daily administration of lactobacilli 7 days before or in simultaneous inoculation with Giardia trophozoites efficiently reduced G. lamblia infection in mice. More specifically, excretion of Giardia cysts were reduced significantly in probiotic-treated groups, and resolution of infection was observed by day 21 post-inoculation. It was also observed that the lactobacillus count increased tremendously and continuously in faeces of all probiotic-fed mice, and was significantly higher as compared with that in control mice. Histological analysis of microvilli membrane integrity revealed that probiotic administration also protected mice against parasite-induced mucosal damage, whereas Giardia-infected mice had severe villous atrophy, oedema, vacuolation and ileitis. Immunologically, the anti-Giardia serum IgG level was not stimulated significantly by probiotic treatment administered both prior to and simultaneous with Giardia infection, but remained high after the infection peak. Taken together, the data demonstrates the anti-giardial effect of the probiotic in vivo by modulation of the intestinal epithelial cells, inhibiting the colonization of Giardia trophozoites and thereby reducing the severity of Giardia infection.

Alteration of secretory IgA in human breast milk and stool samples after the intake of a probiotic - report of 2 cases

100%

Nikolov P. , Baleva M.

nr 1

25-29

Only a few studies reveal immunological changes in breast milk after the intake of probiotic and none focus on secretory IgA (sIgA). The aim our report was to investigate the levels of sIgA in human breast milk and stools before and after 4 weeks of probiotic intake in a patient with ulcerative colitis (UC) and a control. The study included 2 lactating women: 1 with UC and 1 control. Both received daily 3.75 billion viable Lactobacillus bulgaricus for 28 days. SIgA was measured in breast milk and stools before and after the probiotic intake. The concentration of sIgA in breast milk before the probiotic intake in UC was 408.5 vs 137.4 µg/ml in contol. Fecal sIgA in UC was 420 vs 274 µg/ml in control. After 28 days of probiotic intake there was a decrease in breast milk sIgA in UC but an increase in control - 266.7 vs 914 µg/ml respectively. There was an increase in fecal sIgA both in UC and control - 674.4 vs 1033 µg/ml. It is tempting to speculate that the different sIgA secretion towards the probiotic may be a result of an altered mucosal immune response in UC.