Ebola – WHO situation report 01 April 2015
Ebola – WHO situation report 1 April 2015
A total of 82 new confirmed cases of Ebola virus disease (EVD) were reported in the week to 29 March 2015, a slight increase compared with 79 cases the previous week. Case incidence in Guinea increased to 57, compared with 45 the previous week. This offset a 4th consecutive weekly fall in case incidence in Sierra Leone, which reported 25 confirmed cases. Liberia reported no confirmed cases over the same period.
In addition to an increase in case incidence in Guinea, the geographic area of transmission also increased. A total of 7 Guinean prefectures reported at least 1 confirmed case in the week to 29 Mar 2015, compared with 3 the previous week. 2 of the 7 prefectures that reported a new confirmed case, Fria and Siguiri, did so for the 1st time in over 50 days. Siguiri, which borders Mali, is the 1st prefecture outside the western area of Guinea to report a confirmed case for over 30 days.
In Sierra Leone, cases were reported from 5 northern and western districts around and including the capital Freetown, which reported 10 new confirmed cases. The neighbouring districts of Bombali (1 case), Kambia (5 cases), Port Loko (6 cases) and Western Rural (3 cases) also reported cases.
Response indicators for Guinea present a mixed picture. Of 35 confirmed deaths from EVD in the week to 29 Mar 2015 15 (43 per cent) were identified post-mortem in the community, compared with 10 of 37 (27 per cent) the previous week. This increase may be attributable to improved access to communities in Forecariah prefecture. The proportion of confirmed cases that arose among registered contacts increased from 38 per cent in the week to 15 Mar 2015 to 53 per cent in week to 22 Mar 2015. A total of 20 unsafe burials were reported in the week to 29 Mar 2015, compared with 26 the previous week.
A 45-day state of health emergency has been declared in the Guinean prefectures of Forecariah, Coyah, Dubreka, Boffa, and Kindia. The capital, Conakry, will also be subject to emergency measures, which include the restriction of movement in areas of transmission, the temporary closure and quarantine of private hospitals and clinics where EVD cases have been detected, and limitation of burial participation to close relatives only. All corpses will be tested for EVD during the 45-day emergency period.
The last confirmed case in Liberia passed away on 27 Mar 2015.Investigations are ongoing to establish the origin of infection. A total of 185 contacts associated with the case are being monitored twice a day. Heightened vigilance is being maintained throughout the country. In the week to 29 Mar 2015, 278 laboratory samples were tested for EVD, with no confirmed cases.
In the week to 29 Mar 2015, 67 per cent of confirmed cases in Sierra Leone came from registered contacts, compared with 84 per cent the previous week. There was one report of an unsafe burial over the same period. The proportion of confirmed deaths from EVD that were identified in the community increased slightly, from 7 of 56 (13 per cent) in the previous week to 8 of 52 (15 per cent) in the week to 29 Mar 2015. Heightened surveillance is being maintained: over 100 suspected cases were reported in the week to 29 Mar 2015, compared with 57 the previous week. The majority of suspected cases (52) were reported during the final 2 days of the 3-day stay-at-home.
There were 8 new health worker infections in the week to 29 Mar 2015:
7 in Guinea, and 1 in Sierra Leone. This brings the total number of health worker infections reported across the 3 most-affected countries since the start of the outbreak to 861, with 495 deaths.
Countries with widespread and intense transmission
There have been a total of 25 178 reported confirmed, probable, and suspected cases of EVD in Guinea, Liberia and Sierra Leone, with over 10 000 reported deaths (outcomes for many cases are unknown). A total of 57 new confirmed cases were reported in Guinea, 0 in Liberia, and 25 in Sierra Leone in the 7 days to 29 Mar 2015.
The total number of confirmed and probable cases is similar in males and females. Compared with children (people aged 14 years and under), people aged 15 to 44 are approximately 3 times more likely to be affected. People aged 45 and over are 3 to 5 times more likely to be affected than are children.
A total of 861 confirmed health worker infections have been reported in Guinea, Liberia, and Sierra Leone; there have been 495 reported deaths.
Communicated by: ProMED-mail
Updated: 14 April 2015