Abstract

The spatiotemporal variations of Barmah Forest virus (BFv) infections were assessed in Queensland, Australia, between 1993 and 2001 utilizing a Geographic Information System. The notified BFv cases came from 441 localities between 1993 and 1995, 512 between 1996 and 1998, and 546 between 1999 and 2001. A statistically significant increase was observed in the number of localities from which the cases were notified by 16.1% for the period of 1996 – 1998 and 23.8% for 1999 – 2001, compared with that for 1993 – 1995 (χ2 (df = 2) = 11.5; p < 0.01). These results indicate that there has been an expanded geographic distribution of the notified BFv infections in Queensland over the last decade. Socio-ecological changes may be causal factors in this expansion.

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