Nigeria has confirmed an Ebola case in a female patient who traveled from Uganda in East Africa to Abuja, the capital of the West African state.
Health Minister Muhammad Ali Pate confirmed the diagnosis following laboratory testing.
The patient is isolated and receiving medical care at a hospital in Abuja.
Health authorities have initiated contact tracing to curb further transmission, identifying 44 close contacts of the patient.
Nigeria is the first West African nation to report a case linked to the current East Africa Ebola crisis, and successfully contained a previous outbreak in 2014.
Ebola is a rare but deadly disease, external caused by a virus.
As the disease advances, vomiting and diarrhea may occur, potentially leading to organ failure. Some, but not all, patients develop internal and external bleeding.
The disease spreads through contact with infected bodily fluids such as blood or vomit.
The outbreak in the Democratic Republic of the Congo, which began in May, has resulted in at least 4,600 deaths and over 9,500 cases, according to the European Centre for Disease Prevention and Control, external.
The case is caused by the Bundibugyo species of Ebola, which is relatively rare; no approved vaccine or treatment is currently available, though clinical trials are underway.
Shortly after the outbreak was announced, Uganda reported at least two deaths. The country declared itself free of the disease in August after the last patient was discharged.
Kenya has also reported at least nine infections.
On Monday, the United States advised its citizens to reconsider travel to Kenya due to health risks and raised the travel advisory level for the country.
Since the outbreak began, Nigeria has heightened disease surveillance, with the Nigeria Centre for Disease Control issuing public health guidance for travelers.
The agency states that travelers from countries with active or relevant Ebola transmission may be required to complete a health declaration form; those arriving from other nations are currently exempt.
Travelers have been urged to remain vigilant and seek prompt medical attention if Ebola symptoms develop.
In 2014, Nigeria successfully contained an Ebola outbreak that resulted in at least eight deaths.