In this study the feeding practices of 378 mothers who had under- two years old children were assessed in five health services.The mean age of the study subjects were 24.87 are 4.92 years old, and the majority of the mothers (77.6%) were at the range of 20 to 29 years old, 5.5 percent of the subjects below the 18 years old, and the rest 16.9% of the mothers were over 30 years old.The results showed that 88.2% of mothers had breasfed their children and only 14.8% had formula fed subjects using breastfeed had the education a status of lower than formula using subjects.In other words, mothers who had high school diploma or university educations preferred formula feeding methods. Based on our results, education program about the advantages of breastfeeding in the Health services had positive impact on the breast feed choice About 94.1% of the subjects who had received the education from the health services, had breast fed choice.In contrast, mothers who had formula fed choice, as a source of information about the methods of feeding their children received this program from friends and relatives.The finding of this study also indicated that the short period of stay in hospital after delivery, small size of the family, and the birth order of infant had positive effects on the breast feed choice.Seems that some antibiotic resistant strains are killed more rapidly in the presence of static fields. In fact a synergism is created. The peak of these effects for magnetic fields is the field of (0.19 + 0.02) T and for electric field is the field of (1680 + 50) N/C is one hour and after this period the effect will be saturated. Moreover it was observed that these fields haven t sensible effect on these strains.