A severe case of respiratory diphtheria detected in a Perth metropolitan area child has sparked an urgent public health response and a renewed vaccination push across Western Australia, according to the Western Australia Department of Health. Public Health officials are actively conducting contact tracing, offering testing, antibiotics, and targeted vaccinations to high-risk contacts, including providing support to a school located in the state’s north-eastern suburbs.
Perth Metro Detection Expands Regional Outbreak
The pediatric diagnosis marks a respiratory diphtheria case in the Perth metropolitan area as a broader regional outbreak continues to grow, according to state health authorities.
Earlier figures detailed by state health officials outlined 31 cases in the Pilbara and four in the Goldfields, while a prior detection in the Mid West confirmed the illness was advancing southward.
Targeted Immunization and Community Outreach
To curb transmission, WA Health Director of Communicable Disease Control Dr. Paul Armstrong emphasized that immunization remains the primary line of defense against severe disease. “We particularly want to increase vaccination among adolescents and adults, and I strongly encourage anyone eligible to take up the offer,” Dr. Armstrong stated, as reported by the Western Australia Department of Health.
Eligibility for the diphtheria vaccine booster extends to all Aboriginal people statewide, alongside non-Aboriginal residents living in the Kimberley, Pilbara, Goldfields, and Midwest regions. State and local outreach efforts—including door-to-door visits and pop-up clinics—have helped administer nearly 18,000 diphtheria-containing vaccines across affected regional communities over a three-to-four-month period, according to the Department of Health.
Additionally, an Australian Medical Assistance Team (AUSMAT) has deployed to the Fitzroy Valley to assist local organizations, working alongside Nindilingarri Cultural Health Services and the WA Country Health Service Community Health. This deployment supports Aboriginal Community Controlled Health Services that have spearheaded local vaccination campaigns throughout the outbreak.
Clinical Characteristics and Health Risks of Diphtheria
Diphtheria manifests as an infection affecting either the skin or the throat, though respiratory diphtheria presents the most severe clinical challenges.

Transmission occurs primarily through close contact with respiratory droplets, direct contact with infected skin sores, or handling contaminated items such as bandages and shared towels. Investigations remain ongoing to determine the specific acquisition source for the latest pediatric case in Perth.
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