« Previous AbstractEditorial: volatile organic compound analysis to improve faecal immunochemical testing in the detection of colorectal cancer    Next AbstractFasciola hepatica: comparative effects of host resistance and parasite intra-specific interactions on size and reproductive histology in flukes from rats infected with isolates differing in triclabendazole sensitivity »

Aust N Z J Public Health

Title:		"Multiple outbreaks of dengue serotype 2 in north Queensland, 2003/04"
Author(s):		Hanna JN; Ritchie SA; Richards AR; Taylor CT; Pyke AT; Montgomery BL; Piispanen JP; Morgan AK; Humphreys JL;
Address:		"Tropical Public Health Unit Network, Queensland Health, Cairns, Queensland. Jeffrey_hanna@health.qld.gov.au"
Journal Title:		Aust N Z J Public Health
Year:		2006
Volume:		30
Issue:		3
Page Number:		220 - 225
DOI:		10.1111/j.1467-842x.2006.tb00861.x
ISSN/ISBN:		1326-0200 (Print) 1326-0200 (Linking)
Abstract:		"OBJECTIVES: To describe the various investigations and responses to multiple outbreaks of dengue serotype 2 that occurred in north Queensland in 2003/04. METHODS: Details about each case were collated so as to target mosquito-control responses including control of mosquito breeding sites, interior spraying of selected premises, and a novel 'lure and kill' approach using lethal ovitraps. Phylogenetic analyses were undertaken to determine the genetic relatedness of viruses isolated during the outbreaks. RESULTS: Except for a two-month hiatus in mid-2003, the outbreaks continued for 16 months and included approximately 900 confirmed cases, with three severe cases and one death. The available evidence suggests that the mosquito-control measures were effective, but delays in recognising the outbreaks in Cairns and the Torres Strait coupled with intense mosquito breeding contributed to the extensive nature of the outbreaks. Phylogenetic analyses showed that there had been only two major outbreaks, one that spread from Cairns to Townsville, the other from the Torres Strait to Cairns; both were initiated by viraemic travellers from Papua New Guinea. CONCLUSIONS: Phylogenetic analyses were essential in understanding how the outbreaks were related to each other, and in demonstrating that dengue had not become endemic. Further innovative approaches to dengue surveillance and mosquito control in north Queensland are necessary. IMPLICATIONS: Dengue outbreaks have become more frequent and more severe in north Queensland in recent years, raising the possibility that dengue viruses could become endemic in the region leading to outbreaks of dengue haemorrhagic fever"
Keywords:		Aedes/virology Animals Dengue/*epidemiology/transmission/*virology Dengue Virus/classification/genetics/*isolation & purification Disease Outbreaks/*prevention & control Female Humans Insect Vectors/virology Male Mosquito Control/methods Phylogeny Queensl;
Notes:		"MedlineHanna, Jeffrey N Ritchie, Scott A Richards, Ann R Taylor, Carmel T Pyke, Alyssa T Montgomery, Brian L Piispanen, John P Morgan, Anna K Humphreys, Jan L eng 2006/06/28 Aust N Z J Public Health. 2006 Jun; 30(3):220-5. doi: 10.1111/j.1467-842x.2006.tb00861.x"