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  • Title: Recurrence of yaws outbreak in Thailand, 1990.
    Author: Tharmaphornpilas P, Srivanichakorn S, Phraesrisakul N.
    Journal: Southeast Asian J Trop Med Public Health; 1994 Mar; 25(1):152-6. PubMed ID: 7825005.
    Abstract:
    In November 1990, an outbreak of yaws was reported in a rural village of southern Thailand. A survey consisting of history taking, physical examination and blood tests for VDRL and TPHA was undertaken in the whole village and in the primary school of the village. A yaws case was defined as a person who had a positive VDRL confirmed by TPHA without history of other treponemal infection or post-treatment of yaws. Fifty-four cases, an attack rate of 23%, were found in the age range from 2 to 79 years old. The epidemic curve started with a few cases in 1989 and early 1990 with an increasing number of cases from June, and reached its peak in November. Half of the cases (53.7%) were children under 15 years. Male cases were higher than female (1.5:1). A survey of 105 primary school students found an attack rate of 32% (34/105) and the prevalence was higher in younger classes. Benzathine penicillin injection was given to cases for treatment. From this investigation, the Ministry of Public Health was alerted about the recurrence of yaws. Strengthening health education and surveillance activities was recommended in adjacent districts and provinces. The extent of the problem was assessed through surveys among school children and expanded to their family members if cases of yaws were found.
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