NCDC Places Travellers from Ebola-Hit Countries on 21-Day Surveillance
The Nigeria Centre for Disease Control and Prevention (NCDC) has placed travellers arriving from countries experiencing Ebola outbreaks under intensified surveillance, directing health workers nationwide to closely monitor individuals who develop symptoms within 21 days of arrival.
The directive is contained in updated surveillance guidelines issued to health facilities and disease surveillance officers across the country as Nigeria remains on heightened alert over Ebola outbreaks in parts of Africa, particularly in the Democratic Republic of Congo and Uganda.
According to the NCDC, any person who develops a sudden fever and other symptoms associated with Ebola within 21 days of travelling to an affected country should be treated as a suspected case and immediately investigated.
The agency stated that individuals presenting with a sudden onset of fever and at least three symptoms—including headaches, lethargy, loss of appetite, muscle or joint pain, stomach pain, difficulty swallowing, vomiting, difficulty breathing, diarrhoea or hiccups—after visiting countries reporting suspected or confirmed Ebola cases within the previous 21 days should be regarded as suspected cases.
The NCDC also identified unexplained bleeding in travellers returning from affected countries as a major warning sign requiring urgent public health attention.
“Any person with a sudden onset of fever and at least three of the following symptoms—headaches, lethargy, anorexia, aching muscles or joints, stomach pain, difficulty swallowing, vomiting, difficulty breathing, diarrhoea or hiccups—and travel history to countries reporting suspected or confirmed Ebola cases within the last 21 days should be treated as a suspected case,” the agency stated.
The public health agency further warned that individuals who had contact with a confirmed or probable Ebola patient within the previous 21 days and subsequently developed fever, with or without other symptoms, should be investigated immediately.
According to the guidelines, the 21-day monitoring period is critical because it corresponds with the known incubation period of the Ebola virus, during which exposed individuals may begin to show symptoms.
Beyond international travel, the NCDC advised healthcare workers to be vigilant in identifying people exposed to wildlife, bushmeat or animal body fluids who later develop persistent fever that does not respond to routine treatment.
The agency explained that contact with infected animals, dead wildlife or contaminated animal products remains a recognised route of transmission from animals to humans.
The guidelines also define a probable Ebola case as any suspected case with an epidemiological link to a confirmed patient for whom laboratory confirmation could not be obtained.
The NCDC emphasised that only laboratory testing can confirm Ebola infection.
“Laboratory-confirmed cases must test positive for the virus antigen through detection of virus RNA by reverse transcriptase-polymerase chain reaction (RT-PCR) or through the detection of IgM antibodies directed against Ebola,” the guidelines stated.
As part of efforts to strengthen early detection and response, the agency expanded community-based surveillance measures and urged residents to promptly report unusual illnesses and unexplained deaths.
Under the surveillance framework, any person with persistent fever that does not respond to treatment, unexplained bleeding, bloody diarrhoea, blood in urine or any sudden and unexplained death should be reported immediately to health authorities for investigation.
“Any sudden or unexplained death should be considered a priority event for investigation,” the NCDC stated.
Public health experts say community reporting remains one of the most effective tools for detecting outbreaks before they spread widely, while early identification and isolation of suspected cases remain critical to preventing transmission.
The renewed emphasis on the 21-day monitoring period reflects lessons learned from previous Ebola outbreaks across Africa, where delays in detecting exposed individuals contributed to the spread of the disease.
Ebola Virus Disease is a severe and often fatal illness transmitted through direct contact with the blood, body fluids, organs or tissues of infected persons, as well as contaminated materials.
Nigeria’s public health authorities remain particularly vigilant following the country’s successful containment of the 2014 Ebola outbreak, which resulted in 20 confirmed and probable cases and eight deaths before transmission was halted through aggressive contact tracing and rapid public health interventions.
Health officials maintain that early reporting, prompt investigation of suspected cases and strict adherence to infection prevention measures remain essential to safeguarding the country against another Ebola outbreak.