Dengue-1 Outbreak, Tuvalu: Situational Report 25th March to 28th July 2019 (Week 30, 22-28 July) Report Date: Thursday 1st August, 2019


Case Definition

• Suspected case definition: An acute febrile illness for more than 2 days with two or more of the following: nausea, aches, rash, low white blood cell, joint pain, warning signs

• Confirmed case definition: Isolation of dengue virus or detection of antigen NS 1 Ag or IgM antibody or IgM and IgG antibodies in blood

Outbreak Overview

• Dengue1 outbreak declared on the 27th of March 2019

• From March 25th to July 28th a total of 508 dengue like illness (DLI), were reported and 210 were confirmed

• Confirmed cases peaked in weeks 18 and 25

• One case was hospitalized (for 24-hour observation) and no deaths were reported this week.

• Febrile cases are also reported with the same downward trend from the Outer Islands (OIs)


• Age range: 0-65 years

• Female: Male ratio: 1:1.2

• Total average: 58%

• Median age:9yrs

• Majority of cases are children (5-9yrs)