We examined the distribution of genetic mutations associated with resistance to the M2 ion channel-blocking adamantane derivatives, amantadine and rimantadine, among H5N1 viruses isolated in Vietnam, Thailand, Cambodia, Indonesia, Hong Kong, and China. More than 95% of the viruses isolated in Vietnam and Thailand contained resistance mutations, but resistant mutants were less commonly isolated ...

Characterization of porcine reproductive and respiratory syndrome virus (PRRSV) isolates from pigs in Thailand showed 30-aa discontinuous deletions in nonstructural protein 2, identical to sequences for highly pathogenic PRRSV. The novel virus is genetically related to PRRSV from China and may have spread to Thailand through illegal transport of infectious animals from bordering countries.

background: feline hemotropic mycoplasmas are parasites of erythrocytes and include three species, mycoplasma haemofelis, candidatus mycoplasma haemominutum and candidatus mycoplasma turicensis. diagnosis of the infection with these microorganisms can be carried out using conventional assays such as blood cytology. however, these assays have a low accuracy and a high rate of false-positive resu...

In 2010, chikungunya virus of the East Central South African genotype was isolated from 4 children in Myanmyar who had dengue-like symptoms. Phylogenetic analysis of the E1 gene revealed that the isolates were closely related to isolates from China, Thailand, and Malaysia that harbor the A226V mutation in this gene.

A recent study examining genetic variations among the 3 completely sequenced white spot syndrome virus (WSSV) genomes isolated from China, Thailand and Taiwan revealed five major differences among them. Of these differences, a deletion region between ORF 23/24 and a variable region of ORF14/15 prone to recombination were of particular evolutionary significance. Focusing on these regions, 81 WSS...

Forty-six strains of Japanese encephalitis (JE) virus from a variety of geographic areas in Asia were examined by primer-extension sequencing of the RNA template. A 240 nucleotide sequence from the pre-M gene region was selected for study because it provided sufficient information for determining genetic relationships among the virus isolates. Using 12% divergence as a cutoff point for virus re...

To the Editor: During 2004– 2005, 3 major waves of avian influenza outbreaks occurred in Thailand (1). The first wave was reported in early January 2004, the second in July 2004, and the third in October– December 2005. In total, 22 persons were infected and 14 died. Recently, a fourth wave began on July 23, 2006. The Thai Ministry of Public Health reported that avian influenza A (H5N1) virus k...

Peanut stripe virus (PStV) is one of the most common viruses infecting peanut that causes great economic losses every year. The 3ʹ-terminal 1082 bp of 74 PStV isolates collected from 12 districts of Shandong province, China were sequenced. Their coat protein (CP) genes were 864 bp in length and shared identities of 98.0%~100% and 98.3% ~100% at nt and aa levels. The identities between the CP ge...