Summer Dengue outbreaks, YF changes

With Brazil entering its summer season, there have been a number of dengue outbreak reports country-wide, due to some heavy summer rains, there has been an increasing number of Aedes Aegypti mosquitoes carrying the virus. The highest number of cases were recorded in Goiás - 80,000 cases (about one-third of all cases nationwide); seven cities at risk of outbreaks. Minas Gerais had 26,000 cases and 8 deaths so far in 2018 and São Paulo - 8,900 cases through November 2018, including cases reported in the municipalities of São Paulo, Ribeirão Preto, Sorocaba and Jundiaí.

According to the Pan American Health Organization / World Health Organization (PAHO/WHO) Yellow Fever (YF) in Brazil has a seasonal pattern, based on historical analysis of human cases and epizootics due to yellow fever in the past 20 years, with 2 different periods: higher transmission occurring between December and May (seasonal period) and lower or interrupted transmission occurring between June and November. However in the last 3 years there has been a change in transmission for YF in Brazil. During 2018, viral circulation continued during the period of low transmission (June to November).

Advice for travellers

Dengue is spread by two types of Aedes mosquitoes. Both breed close to dwellings, are found in shady areas and bite mainly during the daylight hours, making them difficult to avoid. Travellers should cover up with long-sleeved tops, long pants, and shoes and socks when mosquitoes are most active. Apply repellent containing an active ingredient, such as DEET, Picaridin, or PMD when outdoors to all exposed skin. Read more about dengue fever and preventing insect bites.

Before you travel, call Travelvax Australia’s telephone advisory service on 1300 360 164 (toll-free from landlines) for country-specific advice and information. You can also make an appointment at your nearest Travelvax clinic to obtain vaccinations, medication to prevent or treat illness, and accessories for your journey.