Ciguatera Outbreak Confirmed Across Vanuatu: 44 Cases Reported

Vanuatu's Ministry of Health (MOH) has confirmed a significant outbreak of Ciguatera Fish Poisoning across the country, with 44 cases reported between early January and mid-February. The cases span six islands, primarily affecting young adults.

The Ministry attributes an increase in incidents to environmental factors favorable for toxin-producing algae growth.

Outbreak Details

A total of 44 cases of Ciguatera Fish Poisoning were reported in Vanuatu from early January to mid-February. The outbreak has been identified on six islands: Efate, Tanna, Ambae, Pentecost, Maewo, and Santo. The majority of reported cases originated on Efate, indicating a particular hotspot for the current outbreak.

Demographic data reveals that the affected individuals are predominantly young adults aged 15-34, with men accounting for half of those infected. Most individuals reported consuming various types of reef fish prior to experiencing symptoms.

Case Trends

Case numbers initially showed a decline in January but have demonstrated a steady increase since the first week of February. Over the past three weeks leading up to mid-February, the number of reported cases exceeded the national alert threshold of five cases per week. The outbreak peaked at 12 cases in the third week of February, highlighting the escalating nature of the situation.

Understanding Ciguatera: Causes and Symptoms

The Ministry of Health has linked the increase in cases to specific environmental conditions: very hot weather and heavy rainfall. These conditions are known to promote the rapid growth of the algae species responsible for producing ciguatoxins.

Ciguatera is a foodborne illness contracted by eating predatory reef fish that have accumulated naturally occurring ciguatoxins from these certain algae species. Symptoms typically manifest within 24 hours of consuming contaminated reef fish and can include:

• Nausea, vomiting, or diarrhea
• Neurological signs such as numbness, tingling, unsteady movement or staggering walk, and temperature reversal

Public Health Advisory

The Ministry of Health has advised the public to exercise caution when consuming reef fish during this period to prevent further cases and ensure community health.