Objective To understand the status of intestinal parasitic infections and the related knowledge and behavior in residents of Jiaodong area of Shandong Province,so as to provide the evidence for making an appropriate preventive and control strategy. Methods A total of 18 villages from 6 counties in Jiaodong area were selected as investigation sites according to the stratified sampling method. The feces samples of the permanent residents aged above 3 years were collected and examined by Kato-Katz technique to find the intestinal parasite eggs,and the children under 12 years old were examined by the method of cellophane anal swab to detect the Enterobius vermicularis eggs. In addition,50 households in each survey sites were randomly selected to in-vestigate the basic family situation and the condition of awareness on prevention knowledge and formation of correct behavior of res-idents by using a structured questionnaire. Results Totally 6 163 residents involved in the feces examinations,and the total in-fection rate of intestinal parasites was 6.91%. The infection rates of Trichuris trichiura,Ascaris lumbricoides and hookworm were 6.56%,0.62%and 0.21%,respectively. The infection rate of E. vermicularis in children under 12 years old was 0.51%. The eggs of Clonorchis sinensis and Taenia solium were not found in this survey. The awareness rate of knowledge about preventing parasitic diseases was 49.54%. The formation rates of washing hands before eating,washing hands after using the toilet,never eating raw fruit and vegetable without washing clean,never working in the field with bare feet,and never drinking unboiled water were 97.78%,91.95%,88.81%,92.42%and 86.48%respectively. Conclusions The infection rate of intestinal parasites is low in Ji-aodong area,but there is a significant difference among different counties. The awareness rate of knowledge about preventing para-sitic diseases is low,but the formation rate of healthy behavior is high. In the future,the health education and the strategy of tak- ing medicine among the key population should be enhanced,and the project of reconstructing safe water supply and lavatory should be advanced.

Objective:To analyze the clinical efficacy of bone transport with unilateral external fixation in the treatment of massive tibial bone defects.Methods:A retrospective study was conducted to review the 21 patients with massive tibial bone defects who had been treated by bone transport with unilateral external fixation from February 2017 to January 2022 at Department of Trauma Orthopedics, Ganzhou People's Hospital. There were 14 males and 7 females with a mean age of (46.3 ± 11.3) years. Causes for bone defects: trauma ( n=5), resection of bone non-union ( n=9), resection of infected bone ( n=6) and resection of bone tumor ( n=1). The mean bone defect length was (8.3 ± 1.7) cm. Bone transport started from 10 to 12 days after operation, with a speed of 1 mm/d, and was completed in 4 times. X-ray films were reviewed every 2 weeks. The bone union time, external fixation time (EFT), external fixation index (EFI), docking site situation and complications were recorded. The clinical efficacy was assessed by Paley score. Results:All patients were followed-up for a mean time of (13.5 ± 5.5) months. The mineralization of regenerated bone was good. The bone union time was (9.6 ± 2.2) months, the EFT (10.3 ± 4.0) months, and the EFI (1.3 ± 0.4) months/cm. All docking sites got united. The docking sites were cleaned in 14 patients, of whom simple compression with external fixation was performed in 5 and bone grafts at the docking sites in 9. Postoperative nail tract infection was observed in 6 cases, tibial alignment deviation in 1 case, foot drop deformity in 5 cases, horseshoe varus foot deformity in 1 case, toe flexion deformity in 3 cases, and refracture after removing the external fixation in 1 case. By the Paley score, the bony outcomes were rated as excellent in 16 and as good in 5 cases. The functional outcomes were excellent in 10, good in 7, and acceptable in 4.Conclusion:Bone transport with unilateral external fixation is an effective treatment for massive tibial bone defects, showing advantages of easy operation and convenient carry.