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Background and Objective: brucellosis is one of the most common zoonosis diseases. Brucellosis is a systemic disease and affected several organs and tissue in human. This study was performed to determine the knowledge, attitude and practice about brucellosis control among livestock farmers.
Methods: This descriptive-analytic study, was performed on 300 rural literate livestock farmers in BuinZahra, Qazvin Iran during 2019. The knowledge, attitude, and practice, the related factors and demographic characteristics such as age, education level and family count were evaluated by structured six-part questionnaire including 30 questions.
Results: The mean age of the subjects was 41.3±16.4 years. Although 90.7% had heard of brucellosis, only 14% had previous trained. There was a positive attitude about the use of methods to reduce the risk of infection in the family and the seriousness of the issue of animal brucellosis in 19% and 64% of cases, respectively. About 94.7% were attended to veterinarian in suspected cases and 96.7% examined the new animals. 97% were uses of new cheese and milk but the milk was boiled by 89.3%. The mean knowledge was 5.3 ranging from 0 to 8 points in them. There was a statistically significant difference in the knowledge score of individuals according to the information source (P<0.05). Knowledge score and number of household members had positive correlation (r=0.135, P=0.019).
Conclusion: There is medium-level knowledge about brucellosis in livestock farmers. The attitude and some actions (such as dealing with infected livestock) needed to be improved. The probable reason is the high cost of behavior modification in some areas, which has provided the gap between knowledge, attitude and behavior in this area.

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Background and Objective: The widespread use of digital devices by children has become a significant threat to global health. This study was conducted to evaluate the correlation among screen time, sleep quality, and overweight in preschool children.
Methods: This descriptive-analytical study was conducted on 100 preschool children (46 boys and 54 girls) aged 3 to 6 years and their parents in the city of Qazvin, Iran during 2019-2020. Data were collected using interviews and the Factors Associated with Screen Time in Iranian Children and Adolescents Questionnaire (Mozafarian et al., 2017).
Results: Seventy-six percent of the children were the firstborn in their families. The mean cumulative screen time for the children was four hours per day. Fifty percent of the parents did not adequately supervise their child’s television screen time at home. A statistically significant positive correlation was found between body mass index (BMI) and television screen time duration (r=0.24, P=0.01). With an increase in the children’s cumulative screen time, a statistically significant decrease was observed in the child’s sleep duration (r=−0.21, P=0.04). Although mothers had a significantly higher mean screen time compared to fathers (P<0.001), children’s television screen time exhibited a statistically significant correlation with their fathers’ television screen time (r=0.23, P=0.002).
Conclusion: The mean screen time for preschool children is high. Furthermore, the mean screen time is associated with children’s decreased sleep duration and increased BMI.