The incidence and distribution of the human rotavirus G types (VP7 associated: G1~G4) and P types (VP4 associated: P, P, P, P) were determined from 89 rotavirus strains isolated from diarrhea patients between 2001 and 2002 using reverse transcription and multiplex polymerase chain reaction. G types were identified from 83 (95.5%) and P types were from 82 (92.1%) strains. The predominant genotypes were PG2 (28.1%) and PG4 (27%) with much lower incidence of genotypes PG1 (1.1%) and PG3 (1.1%). P type was not detected. A significant genotypic shift was observed that P was the most prevalent genotype that accounted for 75% during the spring season of 2001, coinfection with P and P for 17.5%. P increased gradually to account for 53% of the strains analysed in the following 2002 spring season. Mixed G types revealing coinfections G2/G3 and G3/G4 were found at low frequency (2.2%).