WHO 15.2.2022
Lassa Fever - Nigeria
In Nigeria, from 3 to 30 January 2022, 211 laboratory confirmed Lassa
fever cases including 40 deaths (case fatality ratio: 19%) have been
cumulatively reported in 14 of the 36 Nigerian states and the Federal
Capital Territory across the country (Figure 1). Three states account
for 82% of confirmed cases: Ondo (63), Edo (57) and Bauchi (53). The
other states affected are Benue (11), Ebonyi (5), Oyo (5), Taraba (5),
Kogi (4), Enugu (2), Kaduna (2), Cross River (1), Delta (1), Katsina (1)
and Plateau (1) (Figure 2).
Of the 211 laboratory confirmed cases, five cases have been reported among health workers in two states, Edo (3) and Benue (2).
Figure 1. Weekly number of reported confirmed Lassa Fever cases and deaths in Nigeria during the epidemiological weeks one (commencing 2 January) through four (commencing 23 January) in 2022.
In contrast, noticeably less Lassa fever cases with less geographical spread were reported for the same period (epidemiological weeks 1- 4) in 2021 (54 confirmed cases, including 12 deaths, from 8 States).
Lassa
fever is endemic in Nigeria and the annual peak of Lassa fever cases is
typically observed during the dry season (December–April). Thus, the
number of infections is expected to rise further until the end of the
dry season.
While endemic in Nigeria, cases are much higher than the previous epidemic seasons. This could be attributed to reduced response capacity in surveillance and laboratory testing. It is necessary to continue to monitor the annual peaks of Lassa fever in order to contextualize incidence and inform the effective management of Lassa fever.
Figure 2. Confirmed cases of Lassa fever by States reported in Nigeria from 3 – 30 January 2022
Kommentti 15.2.2022:
Lassakuume on eräs viruksen aiheuttamista verenvuotokuumeista. Se on jyrsijävälitteinen ja endeeminen tauti, tulee kuivan kauden aikana Nigeriassa esiin ( joulu-huhutikuun aikana)..Lassavirus kuuluu arenaviruksiin.
Verenvuotokuumetta aiheuttavien virusten luettelo WHO-lähteessä: .
Viral Hemorrhagic Fevers (VHFs)
- Argentine hemorrhagic fever
- Bolivian hemorrhagic fever
- Chapare hemorrhagic fever
- Sabia-associated hemorrhagic fever
- Venezuelan hemorrhagic fever
- Lassa fever
- Lujo hemorrhagic fever
- Lymphocytic choriomeningitis (LCM)
.
Inga kommentarer:
Skicka en kommentar