摘要
The study aims at finding alternative interventions for the prevention ofE. coli infection in piglets so as to boost farmers＇ benefits and improve environment in the area. Data were collected from one experimental group consisting of 210 small pig holder farms and one control group of 70 farms. All of 280 litters and sows were analyzed and the techniques of early vaccination at 60-80 d of pregnant （time 1） were applied and repeated after 10 d with E. coli vaccine to produce antibodies through milk. The percentage of piglets with diarrhea caused by E. coli significantly decreased from 75.7% to 18.9%. Injection of E. coli vaccine for the pregnant sows created antibodies for young piglets through colostrums. The treatment of E. coli cost 45,420 Vietnam Dong （VND） per litter in the experimental group and that was 156,000 VND/litter in the control group. Use of betel-bokashi （bio-product as plant antibiotics and Lactobacillus） to treat piglet diarrhea was proved safe and effective. Litter size and average weight at birth and weaning were improved significantly （P 〈 0.05）. The average weaned weight of piglets and sows were 11.2 kg and 118.6 kg in the experimental group, compared to 9.4 kg and 89.9 kg in the control group, respectively. Piglets in the experimental group had good health, no diarrhea and a shorter weaning time （2 d） and mating interval 2.22 days earlier than those in the control group. The average profit of 210 households was significantly higher in the experiment group： feed-cost was much lower than that in the control group. Small-holder farms implementing the experiments of applying the techniques received more financial profit, which was 1,502,000 VND per year per sow, while those who did not apply the techniques gained only 223,000 VND per year per sow.
