Eight cases of measles have been notified in WA since 10 July 2025, linked to a case in a returned overseas traveller, of which five cases have been notified since 01 August 2025.

Consider measles in any patient with fever and rash, especially if they have recently travelled overseas or attended a listed exposure location during the specified period (even if vaccinated).

Test suspected cases for measles PCR (urine and throat swab) and mark the form as URGENT.

Fit suspected cases with a mask and advise them to isolate until results are available.

Urgently telephone 9956 1985 to notify of suspected measles cases with clinically compatible illness and epidemiological link to public health (do not wait for laboratory confirmation before notifying).

Epidemiological situation

Measles outbreaks continue to occur overseas, particularly in Asia, the Middle East and Africa.

Recent WA cases have been linked to a returned overseas traveller from Southeast Asia. Five cases have been notified since 01 August 2025.

Exposure locations include regional flights, flights between Perth and Bali, Indonesia, and public venues. The full list, including specified exposure periods, are available here.

Signs and symptoms

Symptom onset is 7 to 18 days after exposure to a measles case (the incubation period).

Symptoms of measles include 2-4 days of fever and malaise with coryza, conjunctivitis and cough.

Koplik spots are not commonly observed.

This is followed 2-7 days later by a non-pruritic maculopapular rash which commences on the face/head and then descends to the torso. Patients usually have a fever and are clinically unwell.

Attenuated illness and an atypical rash can occur in those that are fully or partially vaccinated.

Laboratory testing

The following tests are recommended for suspected measles. Mark the request form as URGENT.

1. Measles PCR on the following specimens:

• throat swab or nasopharyngeal aspirate in viral transport medium (or dry swab), and
• first catch urine
• if possible, also collect 3mL of blood in an EDTA tube.

2. Measles serology: if possible, collect 3mL blood in SST tube, and request measles IgM and IgG.

Measles quick guide

Refer to the measles quick guide for primary healthcare workers for guidance on assessment, testing, infection prevention and control measures, and notification.

Vaccination

Anyone born after 1965 should ensure that they are immune to measles (have evidence of two doses of a measles containing vaccine); this is especially important prior to travel.

It is recommended that infants aged 6 to 11 months who are travelling to areas of high risk receive a dose of MMR vaccine. This may be offered following an individual risk assessment.

Notification of cases

Urgently notify the Public Health Unit: 9956 1985 of suspected measles,
or call 1800 434 122 if after hours.