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Cases of Lassa fever continue to be reported in Nigeria (where the infection is endemic). Since the beginning of 2015, a total of 227 cases have been recorded; this compares with 916 cases for the same time period in 2014.
Thus far in 2015, cases of Lassa fever have been reported from the following states: Bauchi (3), Borno (7), Edo (180), Gombe (2), Kogi (2), Kwara (2), Nasarawa (2), Ondo (2), Plateau (22) and Taraba (4).
Lassa fever is a low risk for most travellers unless living in poor sanitary conditions with overcrowding in rural areas where the host is usually found. Lassa fever is a zoonotic viral disease transmitted via the excreta of an infected Mastomys rat. Healthcare workers are at risk if good infection control and barrier nursing methods are not maintained.
Travellers returning from affected areas who develop symptoms of fever, malaise, headache, sore throat, muscle pain, chest pain, nausea, vomiting, diarrhoea, and abdominal pain should seek medical advice.
