Background and Objective : Nursing is an extremely stressful profession. Nurses are confronted with a variety of personal, communicational and organizational stresses, which affect on their health and job satisfaction reversely. The purpose of present study is to determine nurse's job stress in therapeutic-educational centers in Zanjan.

  Material and Methods : In this cross sectional descriptive- analytical study 155 nurses of nursing staff of teaching hospitals of Zanjan were selected by stratified random sampling in 2010. The instruments were a demographic data sheet and Toft-Gray and Anderson's nursing stress scale. The Data were analyzed by SPSS-­14.5 software, using descriptive statistics and Spearman & Pearson correlation coefficient.

  Results: The results show that various occupational conditions lead to tensions, high level (57.4%), moderate (40%) and low intention (2.6 %). Based on Spearman, there is a significant relationship between levels of tension and education status (r= 0.192, P= 0.017). Other variables such as age, sex, ward, marital status, shift working, record of services, overtime and number of children show no significant relationship with occupational stress.

  Conclusion: Regarding to the harmful effect of occupational stress on nursing staff, we recommend that the authorities to consider reducing the stressful factors such as dissatisfaction of salary and premium, job overload, ambiguous roles and lack of social support.

  Background and Objective : Trichomonas vaginalis infection is a common sexually transmitted protozoal infection and is associated with several adverse outcomes such as preterm labour, delivery of a low-birth weight infant, and facilitation of sexually transmission of human immunodeficiency virus. In Iran, the prevalence of trichomoniasis has been reported between 2 to 8%. The aim of the study was to investigate the prevalence of this infection among women referred to a laboratory in Zanjan.

  Material and Methods: ­In this Cross-sectional study, 328 women were selected via convenience sampling. Because of vaginal discharge, itching, burning and malodor, they were referred to a laboratory by a gynecologist. After preparing a demographical check list, the vaginal specimens were examined by wet smears for Trichomonas vaginalis, in 2010. To analyze the data, we use chi square and fisher exact test.

  Results: The clients (54.43%) ­are 25-­34 years old, homemaker­(87%), illiterate or­­ primary school education­ (48%).­The prevalence of T.­ Vaginalis infection is­ 6.4%.­ there is no significant relationship between T.­Vaginalis infection and factors like age, education level, marriage age, contraceptive method, occupation, dwelling place and number of labour.

  Conclusion: In comparison with other studies, the prevalence of Trichomonas vaginalis in Zanjan is moderate. Because of co-existing with other sexually transmitted diseases (STDs), we suggest conducting further studies about the prevalence of other STDs in Zanjan.

  Keywords: Trichomonas vaginalis, Prevalence, Zanjan