Background: Phu Tho is a mountainous province in the northwest of Vietnam. People here have the habit to eat raw fish; this is the favorable conditions for small liver fluke (clonorchsis sinensis) circulation and development. \r\n', u'Objectives: 1) To determine infection rate and infection intensity in workers of tea companies in Phu Tho province. 2) To evaluate effectiveness of treatment Clonorchis sinensis by Distocid.\r\n', u'Subjects and methods: Across- sectional survey was carried out in September 2007 in the tea companies in Phu Tho province, 400 peoples (200 male, 200 female), were examined stool samples to find helminthic eggs by Kato-Katz technique.\r\n', u'Results: The cumulative infection rate Clonorchis sinensis was 22.25%, of which a significant difference of the infection rate of clonorchis sinensis was found in males: 27.4% and in females: 16.7%, respectively (p< 0.05). The cure rate by Distocid was 97.7%.\r\n', u'Conclusion: The infection rate of workers in the areas was rather high\r\n', u'Therefore, it is necessary to propagandize and educate for workers and the community understanding of the harmful effects of Clonorchis sinensis and how to prevent small liver fluke disease; changing risk behaviors such as not eating raw fish\r\n', u'
Clonnorchis sinensis ; workers ; tea companies

Trombiculid “chigger” mites (Acari) are ectoparasites that feed blood on rodents and another animals. A crosssectional survey was conducted in 7 ecosystems of southern Vietnam from 2015 to 2016. Chigger mites were identified with morphological characteristics and assayed by polymerase chain reaction for detection of rickettsiaceae. Overall chigger infestation among rodents was 23.38%. The chigger index among infested rodents was 19.37 and a mean abundance of 4.61. A total of 2,770 chigger mites were identified belonging to 6 species, 3 genera, and 1 family, and pooled into 141 pools (10-20 chiggers per pool). Two pools (1.4%) of the chiggers were positive for Orientia tsutsugamushi. Ricketsia spp. was not detected in any pools of chiggers. Further studies are needed including a larger number and diverse hosts, and environmental factors to assess scrub typhus.