Isolation of Langat Virus from Haemaphysalis Papuana Thorell in Thailand

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  • Departments of Virology and Medical Entomology, U. S. Army Medical Component, SEATO, APO San Francisco 96346

A strain of Langat virus (LGT), T-1674, was isolated from a pool of Haemaphysalis papuana Thorell collected in the forest of Khao Yai National Park in Central Thailand. The isolated virus was found to have growth and antigenic similarity to the prototype Langat strain (TP-21). This is the first report of a natural infection of Haemaphysalis ticks with LGT and of the isolation of this arbovirus in Thailand. The wide distribution of known vectors of LGT in Thailand suggests that the virus may be present in other areas of the country.