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Articles by C. Chu
Total Records ( 2 ) for C. Chu
  S.Y. Chen , Z.X. Liu , Y.D. He , C. Chu and M.Q. Wang
  A total of 72 weaning piglets with an average initial body weight of 8.72±1.01 kg were randomly allotted into one of three groups to investigate the effects of lipase on growth, digestive enzymes activities and intestinal morphology. Pigs were fed on the same basal diet supplemented with 0 and 200 mg kg-1 Uncoated Lipase (UC-LIP) or Coated Lipase (CT-LIP). After 28 days feeding trail, 18 pigs from the control, 200 mg kg-1 UC-LIP and 200 mg kg-1 CT-LIP groups were slaughtered to collect samples for assay. The results showed that supplemental lipase increased ADG (p<0.05) and decreased F:G ratio (p<0.05) and diarrhea rate (p<0.05) of pigs and the coated lipase is more effective than uncoated lipase. With the supplementation of CT-LIP, concentration of TP, FFA and LIP activity in serum was increased (p<0.05) and concentration of LDL, SUN, TG was decreased (p<0.05). The supplemental lipase increased lipase activity in pancreas (p<0.05) and the activities of trypsin, lipase, amylase and FFA concentration in duodenal content (p<0.05). Compared to the UT-LIP, the CT-LIP is more effective on the above digestive enzymes (p<0.05). The supplemental increased villus height, VH:CD ratio and decreased crypt depth in duodenum and jejunum (p<0.05). The results indicated that dietary supplementation of coated-lipase has positive effect on growth, digestion and intestinal morphology in weaning piglets.
  E Liu , S Cheng , X Wang , D Hu , T Zhang and C. Chu

Contact investigation is a logical approach to intensified case finding in China. However, currently there are no written national guidelines. The aim of this study is to review the published literature that describes the procedures followed by local level and report the yield for active tuberculosis (TB) cases.


Studies conducted in China and published between 1997 and 2007 on contact investigation were searched.


Twelve studies were included in the review. There was no standard definition of contact and no study provided details on how to prioritize contacts. Investigation methods vary between each study. The number of contacts investigated per index case ranged from 22.7 to 658 in congregate settings and from 1.5 to 5.8 in household. The yields for active TB ranged from 0 to 11.765% in congregate settings and from 0 to 6.897% in household. The weighted yields for smear-positive index and smear-negative index were 1 and 0.2% respectively in household and 0.5% for pulmonary case index in congregate settings.


There is considerable heterogeneity amongst the methods used and the cases yielded in these studies, and in general the quality of contact investigation is low; therefore, there is a need for China to develop national guidelines on contact investigation.

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