[Advances in automatic detection technology for images of thin blood film of malaria parasite].

This paper reviews the computer vision and image analysis studies aiming at automated diagnosis or screening of malaria in microscope images of thin blood film smears. On the basis of introducing the background and significance of automatic detection technology, the existing detection technologies are summarized and divided into several steps, including image acquisition, pre-processing, morphological analysis, segmentation, count, and pattern classification components. Then, the principles and implementation methods of each step are given in detail. In addition, the promotion and application in automatic detection technology of thick blood film smears are put forwarded as questions worthy of study, and a perspective of the future work for realization of automated microscopy diagnosis of malaria is provided.

Molecular Epidemiological Characteristics of Staphylococcus aureus Strains Associated with Food Poisoning in Xi’an from 2013 to 2017 / 中华疾病控制杂志

Objective To understand the molecular epidemiological characteristics of staphylococcus aureus(S.aureus),which was isolated from food poisoning in Xian between 2013 and 2017. Methods A total of 26 S.aureusisolates from 8 outbreaks were analyzed by using pulsed field gel electrophoresis(PFGE), multilocus sequence typing(MLST) and spa typing. polymerase chain reaction(PCR) analysis was used to analyze the staphylococcal enterotoxin genes sea to sei. Results 26 strains of S.aureus were divided into 7 types of A-G by PFGE; They were divided into 3 types by MSLT, ST6 accounted for 65.38% which was the main type; They were Divided into 4 types by spa typing, t701 accounted for 65.38 % which is the dominant type. The sea accounted for 76.92% (20/26) in the enterotoxin gene testing; sed-seg accounted for 23.08% (6/26); other enterotoxin genes were not detected. Conclusion The predominant type of S.aureus isolated from food poisoning in Xi'an was ST6-t701-seaprofile from 2013 to 2017. The first detection of the new enterotoxin gene seg, PFGE, MLST and spa typing were combined to fully understand the molecular epidemic characteristics of strains.