nutritional status of preschool children infected with giardia intestinalis

giardia intestinalis is the most common intestinal parasite in human worldwide. it can produce a wide spectrum of clinical manifestations. in order to assess the nutritional status of preschool children infected with giardia intestinalis, a cross sectional study was made in marvdasht city, fars province, southern iran. a total of 337 preschool boys and girls aged 3-6 years were randomly selected for stool examination of intestinal parasites as well as measurement of height, weight, head and arm circumferences. a total of 77 individuals were infected with g. intestinalis. seventy-one individuals who had only g. intestinalis and 229 with no parasitic infections were selected as infected and control groups, respectively. z-score of -2sd was used as cut off point of malnutrition. a total of 9 (12.7%) of infected children and 18 (7.9%) of non infected individuals had a height for age z-score (haz) below -2sd. eight (11.3%) of former group had a weight for age z-score (waz) under-2sd. in control group 4.4% of preschool children had waz under-2sd. 4.2% of infected children had a weight for height z-score (whz) under-2sd but none of the controls had it. statistical analysis showed a significant difference in height, weight, head circumference, haz, and waz between infected and control children (p<0.05). also, haz and waz, was significantly different between these two groups, but not for whz. a higher infection with g. intestinalis in the children with lower parents’ education was observed. however the distribution of malnutrition was not significantly different between boys and girls. in conclusion the present study indicated that giardiasis retarded growth of preschool children in this region.