Objective: To explore the health status of the workers who were leaving their posts from small-scaled coal mines, and to provide evidence for coal workers’ pneumoconiosis prevention and safeguard measures. Methods: In 2017, 1008 workers from the coal mine in a town were monitored for occupational health, and the effects of working type, age were analyzed and evaluated. Results: The health monitoring of the mine workers in this town showed high rate of the abnormal detection of respiratory system and cardiovascular system, the incidence rate of pneumoconiosis was up to 34.82%. The incidence of pneumoconiosis in different types of work was not the same (P<0.05) , and the incidence of tunneling workers' pneumoconiosis was the highest. Pneumoconiosis detection rate increased with age (P<0.05) . The difference of pneumoconiosis detection rate among workers of different ages was statistically significant (P<0.05) , among which the pneumoconiosis detection rate was the highest in the group of 40 years old. Conclusion The pneumoconiosis is serious in small coal mines in this town. It should strengthen the prevention of diseases such as respiratory system and cardiovascular system of coal mine workers, and pay attention to their health management and prolong the life of patients with pneumoconiosis.

Objective To analyze the status of Leishmania infantum asymptomatic infection in human population of a Kala-azar endemic area in Wenxian County,Gansu Province,and to evaluate the tests used.Methods Blood samples were tested by PCR using two pairs of primers,RV1-RV2 and K13A-K13B,for detecting Leishmania-specific DNA.ELISA and rK39-dipstick were used to detect Leishmania-specific antibodies.Results The positive rate of PCR,ELISA and rK39-dipstick was 30.9%(83/269),24.2%(65/269) and 0(0/269) respectively.Conclusion The prevalence of asymptomatic infection of L.infantum in humans is high in the area.PCR test based on RV1-RV2 and K13A-K13B primer pairs is a sensitive and specific method for detecting the asymptomatic infection.