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534, P=0. 009), different marital status(χ~2=7. 010, P=0. 008), different working years(χ~2=18. 082, P less then 0. 001), and different stress groups(χ~2=152. 565, P less then 0. 001). Multivariate analysis showed that occupational stress is the key factor affecting sub-health. Mild stress(OR=0. 076, 95%CI 0. 040-0. 143)and moderate stress(OR=0. 348, 95%CI 0. 189-0. 641)are the protected factors of sub-health. CONCLUSION The occupational stress rate and sub-health detection rate of medical marketers were both higher. Relieving the pressure of pharmaceutical marketers effectively can improve their sub-health status.OBJECTIVE To understand the various types of food products with microbial food cultures(MFC)added in China's market. METHODS The information of various types of food products with MFC added were collected and recorded from large and medium-sized supermarkets, convenience stores, and also by logging into China's main online shopping platform. The information of categories and labels of food products with MFC added was encoded and de-weighted. The information of corresponding categories were analyzed according to the category of national food safety standard of food products, the distribution of sample categories, frequencies of use of MFC and labeling information were calculated and analyzed. RESULTS A total of 565 samples were selected, including beverages, fermented milk, infant formula, candy, etc. The MFC with higher frequency of use mainly include Streptococcus thermophilus, Bifidobacterium animalis, Lactobacillus delbrueckii subsp. bulgaricus, etc. The MFC were mainly indicated by the name of species and the name of strains in labels. 56. 5% of the samples(including thermo treated products) were described using "probiotics" in their labeling and promotion. CONCLUSION The labels of the name of MFC as well as the type of the products(thermo treated or none) are inconsistent, and the uses of the concept of "probiotics" in some products are debatable.OBJECTIVE To understand the antimicrobial resistance, virulence factors, and molecular characterization of MRSA isolates cultured from ready-to-eat(RTE) foods from several provinces in China. METHODS Totally, 397 S. aureus isolates were collected from RTE foods from several provinces in China, in 2017. The mecA gene was amplified to detect the MRSA strains among all 397 isolates by a polymerase chain reaction(PCR) method. Furthermore, the antimicrobial susceptibility and virulence factors of the MRSA isolates were detected by broth microdilution method and PCR, respectively, while the molecular characterization of all MRSA isolates were analyzed by pulsed-field gel electrophoresis(PFGE). RESULTS In total, 32 MRSA isolates were identified from 397 isolates. All 32 MRSA isolates were resistant to penicillin, oxacillin and cefoxitin. Meanwhile, 78. 1%, 65. 6%, 53. 1, 28. 1% and 12. 5% of the 32 MRSA isolates showed resistant to erythromycin, clindamycin, tetracycline, chloramphenicol, and ciprofloxacin, respectiteristics.OBJECTIVE To examine the prevalence and associated factors of underweight among the elderly in Qionglai City. METHODS A total of 14 929 residents aged ≥60 years recruited through multistage stratified cluster random sampling in 24 towns or streets of Qionglai City were surveyed from August to October 2018, including 7581 males and 7348 females; 8121 aged 60-69, 5176 aged 70-79, and 1632 aged ≥ 80. Questionnaires and physical examinations were conducted to collect the characteristics, behaviors, healthy history of the subjects, height, and weight, etc. The judgment of underweight was based on the criteria of weight for adults(WS/T 428-2013). The prevalence of underweight was calculated and its determinants were analyzed with a non-conditional logistic regression model. RESULTS The prevalence of underweight among the elderly was 5. 7%(851/14929), 5. 4% for male(413/7581) and 6. 0% for female(438/7348). The result of logistic regression analysis revealed that female(OR=1. 365, 95%CI 1. 147-1. 624), aged elderly ≥ 70 years(70-79 years OR=1. 652, 95%CI 1. 402-1. 948; ≥80 years OR=2. 557, 95%CI 2. 079-3. 145), no spouse(OR=1. 196, 95%CI 1. 008-1. 420), former and current smokers(current smokers OR=1. 247, 95%CI 1. 018-1. 528; former smokers OR=1. 536, 95%CI 1. 036-2. 276), daily physical activities less than 6000 steps(OR=1. 259, 95%CI 1. 083-1. 462), those who didn't receive medical diagnosis of hypertension(OR=1. 591, 95%CI 1. ABBV075 321-1. 915) presented a high prevalence of being underweight. CONCLUSION The prevalence of underweight is at a low level among the elderly in Qionglai City. Gender, age, marital status, smoking, daily physical activities, hypertension were associated with being underweight.OBJECTIVE To analysis the usage status of salt control spoon and explore its influencing factors among student caregivers of four cities. METHODS The data of 2014 salt knowledge, attitude, practice(KAP) survey among urban residents in China was used, which a total of 12 848 student caregivers(male 4862, female 7986) were recruited from Guangzhou, Wuhan, Chengdu and Shenyang by stratified random cluster sampling method. A self-filling questionnaire survey was used to collect information about knowledge of salt and usage of salt control spoon. Logistic regression model was used to explore influencing factors of salt control spoon usage effected by gender, education level, family income, salt related knowledge, etc. . RESULTS The proportion of student caregivers who didn't know salt control spoon was 33. 3%, and 41. 9% of them knew salt control spoon but hadn't it. Only 24. 8% of them have heard of salt control spoon and had it at home. The proportion of having not heard salt control spoon among Wuhan,that high salt diet can cause high blood pressure on the influence of having salt control spoon was 1. 328(1. 221-1. 445), 1. 268(1. 029-1. 563), 1. 243(1. 145-1. 348)and 0. 838(0. 763-0. 921), respectively. Among the student caregivers who having salt control spoon, the OR(95%CI) of knowing the recommended intake of salt, knowing that high salt diet can cause high blood pressure, and source of salt control spoon(community/unit, friends/relatives) on the influence of using salt control spoon was 1. 473(1. 259-1. 722), 1. 249(1. 040-1. 501)and 0. 505(0. 415-0. 615)/0. 603(0. 441-0. 823), respectively. CONCLUSION There still existed lower proportion of awareness and usage of salt control spoon.