ebola treatment center 2012 for msf_uk field study report msfscience

12
Thomas Kratz , Paul Roddy, Olimpia de la Rosa, Diana Pou, Benjamin Jeffs, Antoine Tshomba, Matthias Borchert Bundibugyo Ebola virus disease: symptoms, treatment and outcomes in the Ebola Treatment Centre, Isiro, Democratic Republic of Congo, 2012 ative Commons L ed under Creative Commons License. F1000 : Use Permitted under Creative Commons License. F1000 Posters: Use Use Permitted under Creative Commons License. F1000 Posters: Use Permitted un d under Creative Commons License. F1000 Posters: Use Permitted under Creative ive Commons License. F1000 Posters: Use Permitted under Creative Commo s License. F1000 Posters: Use Permitted under Cre 000 Posters: Use Permit

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Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience Description of clinical features, treatment and outcome of BDBV disease in the 2012 outbreak.

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Page 1: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Thomas Kratz, Paul Roddy, Olimpia de la Rosa, Diana Pou, Benjamin Jeffs, Antoine Tshomba, Matthias Borchert

Bundibugyo Ebola virus disease: symptoms, treatment and

outcomes in the Ebola Treatment Centre, Isiro, Democratic

Republic of Congo, 2012

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Page 2: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Background Ebolavirus: Filoviridae family, single stranded RNA viruses

Humanopathogenic subtypes: Zaire, Sudan, Cote d’Ivoire, Bundibugyo (BDBV)

MSF involved in all Filovirus outbreaks since 1995

BDBV first discovered 2007 in Uganda

Second outbreak declared 17th August 2012 in Isiro, Democratic Republic of

Congo (DRC)

MSF activities during outbreak: Ebola Treatment Centre (ETC), active case

finding, prevention of transmission

Anecdotal experience for BDBV : non-specific symptoms, lower case fatality

ratio (CFR) than Ebola-Zaire

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Page 3: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Objectives Overall objective: Description of clinical features, treatment and outcome of

BDBV disease in the 2012 outbreak

Specific objectives:

Describe patient characteristics

Describe clinical symptoms and differential diagnoses of suspected BDBV

disease

Estimate case fatality ratio (CFR)

Explore the effect of case management and treatment on patient outcome F1000

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Page 4: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

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Page 5: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Methods: demographic and clinical data collected by MSF

•Descriptive epidemiology of BDBV outbreak

•Techniques: Frequencies, proportions and 2-sided Fisher-exact tests with STATA ®

•Ethics Review Board (ERB): -Approved by Kisangani University (DRC)

-Met criteria for exemption from full review by MSF ERB

16

probable

18

lab-confirmed

(IgM Elisa or

PCR)

Community

cases

18

lab-confirmed

Free text data

entered in Word

forms

Data double-entered into EpiData:

•Notification charts

•Temperature/medication charts

•Symptom follow-up charts

Demographic

analysis

•Symptom prevalence

•Differential diagnoses

•Treatment & outcomes

Ebola Treatment

Centre (ETC) cases

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Page 6: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

N (%)

Community

Probable

Cases

N (%)

Community

Confirmed

Cases

N (%) ETC

Confirmed

Cases

N (%)

Total

All cases

Sex Male 3 (18.8%) 2 (11.1%) 7 (38.1%) 12 (23.1%)

Female 13 (81.3%)* 16 (88.9%)* 11 (61.1%) 40 (76.9%)

Age (years) <15 1 (6.3%) 2 (11.1%) 1 (5.6%) 4 (7.7%)

15-54 12 (75.0%) 16 (88.9%) 14 (77.8%) 42 (80.8%)

>54 3 (18.8%) 0 3 (16.7%) 6 (11.5%)

TOTAL 16 18 18 52

Women over-represented in BDBV cases (50.2% general pop.)

* p<0.0001

Results: Sex/age distribution of probable and confirmed cases

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Page 7: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Results: Case fatality ratios (CFR) : by sex and age CFR

Community

Probable

Cases

CFR

Community

Confirmed

Cases

CFR

ETC

Confirmed

Cases

CFR

TOTAL

All

Cases

Sex Male 3/3 (100.0%) 0/2 (0.0%) 2/7 (28.6%) 5/12 (41.7%)

Female 12/13 (92.3%) 4/16 (25.0%) 7/11 (63.6%) 23/40 (57.6%)

Age (years) < 15 1/1 (100.0%) 0/2 (0.0%) 1/1 (100.0%) 2/4 (50.0%)

15-54 12/12 (100.0%) 4/16 (25.0%) 8/14 (57.1%) 24/42 (57.1%)

>54 2/3 (66.7%) 0/0 (0.0%) 0/3 (0.0%) 2/6 (33.3%)

TOTAL 15/16 (93.8%) 4/18 (22.2%) 9/18 (50.0%) 28/52 (53.8%)

- CFR non-significantly higher in women than in men (p=0.51) and in the age group of

15-54 years (p=0.48)

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Page 8: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Results: Symptoms of the 18 confirmed ETC patients

Symptom Self-report

at admission

Developed in

hospital stay

Fever 15/17 (88.2%) 10/18 (55.6%)

Asthenia 16/17 (94.1%) 14/17 (82.4%)

Myalgia 12/17 (70.6%) 12/17 (70.6%)

Arthralgia - 13/17 (76.5%)

Anorexia 12/17 (70.6%) 14/17 (82.4%)

Sore throat 3/17 (17.7%) 12/17 (70.6%)

GI

(nausea/vomit/diarrho

ea)

11/17 (64.7%) 13/17 (76.4%)

Bleeding 5/17 (29.4%) 5/17 (29.4%)

Hiccups 11.8% 35.3%

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Page 9: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Results – treatment outcomes (ETC)

CFR not significantly lower but trend was for improved outcome in following patients: - Received standard treatment of cefixime/multivitamins/paracetamol (40% vs. 63%, p=0.64)

- Received oral or intravenous rehydration (38% vs. 60%, p=0.64)

- Had body temperature and symptoms thoroughly documented (46% vs. 60%, p=1)

* Potential confounding if sicker patients were not able to take treatment

*Low sample size limited statistical power to detect associations between many of the variables

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Page 10: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Results: differential diagnoses Initial diagnoses of the

18 ETC BDBV cases

N (%)

Malaria 13 (28.3%)

Intestinal Parasitosis 5 (10.9%)

Infectious Syndrome 5 (10.9%)

Gastritis 4 (8.7%)

Gastroenteritis 3 (6.5%)

Dehydration 3 (6.5%)

Amoebiasis 2 (4.4%)

Salmonellosis 2 (4.4%)

Typhoid Fever 2 (4.4%)

Immunodefiency Syndrome 2 (4.4%)

Dyspeptic Syndrome 1 (2.2%)

Abdominal Colics 1 (2.2%)

Initial diagnoses of the

18 ETC BDBV cases

N (%)

Cholera 1 (2.2%)

Arterial Hypotension 1 (2.2%)

Hypoglycemia 1 (2.2%)

TOTAL NUMBER OF DIAGNOSES 46 (100%)

BDBV often misdiagnosed as

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Page 11: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Conclusions Women more frequently affected by BDBV than men CFR higher in women and 15-54 year age group High prevalence of non-specific symptoms and gastrointestinal

signs, low prevalence of haemorrhage Hiccups and sore throat more prevalent during hospital stay than

pre-admission (late sign?) Thorough monitoring, standard treatment and rehydration may

improve outcome BDBV frequently misdiagnosed as other infectious diseases, e.g.

malaria Challenges : Quality of documentation, low case numbers

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Page 12: Ebola Treatment Center 2012 for MSF_UK Field Study Report MSFscience

Thank you for

your attention

We thank the healthcare

staff from Isiro and the

patients

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