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Journal of Tropical Pediatrics 1993 39(3):183-187; doi:10.1093/tropej/39.3.183
© 1993 by Oxford University Press
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Mannose-resistant Haemagglutination (MRHA) and Haemolysin (Hly) Production of strains of Escherichia coli Isolated from Children with Diarrhoea: Effect of Breastfeeding

Loreny Gimenes Giugliano, PhD*, Catia Josiane Brzezinsk Meyer, BSc*, Luciano Chaves Arantes, BSc*, Sidarta Tollendal Gomes Ribeiro* and Rodolfo Giugliano, PhD**

*Departments of Cellular Biology, University of Brasilia Caixa Postal, 4585, 70919 Brasilia DF, Brazil
**Departments of Nutrition, University of Brasilia Caixa Postal, 4585, 70919 Brasilia DF, Brazil

Haemolysin production (Hly) and mannose-resistant haemagglutination induction (MRHA) of human(H), bovine(B), and both(HB) erythrocytes was investigated in strains of E. coli isolated from 142 cases of children with diarrhoea aged 0–36 months. Haemolysin production was more frequent in strains isolated from children under 1 year and this characteristic was strongly associated with HB+ haemagglutination (P< 0.005). Isolation frequency of MRHA strains was compared in 53 breastfed and 50 non-breastfed children under 1 year of age. HB+ strains were significantly more frequent in non-breastfed infants (P< 0.025). Severity of diarrhoea evaluated by the number of watery stools per day, was significantly reduced in the breastfed group (P<0.05). The results suggests that breastfeeding may protect infants against the establishment of HB+ strains which might be acting either as a main pathogen or as an opportunistic strain.


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