Liposomal amphotericin B for complicated Kala-azar in ... fileLiposomal amphotericin B for...
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Liposomal amphotericin B for complicated
Kala-azar in Eastern Sudan
How effective is current treatment?
Niven. A. Salih,1 Johan van Griensven,2 Annick Antierens,3 Francois Chappuis,4 Ann Mumina,1
Omar Hammam,1 Philippa Boule,3 Emilie Allirol,4 Mubarak Alnour,5 MousabSiddig Elhag,6
Marcel Manzi,7 Walter kizito,7 Rony Zachariah7
1 Medecins Sans Frontieres-Switzerland, North Sudan mission 2 Institute of Tropical Medicine,
Antwerp, Belgium 3 Medecins Sans Frontieres-Geneva – Operations/Medical Department,
Switzerland 4 Geneva University Hospital, Geneva, Switserland 5 Ministry of Health, Gedaref State,
Gedaref, Sudan 6 Federal Ministry of Health, Khartoum, Sudan 7 Medecins Sans Frontieres-
Luxembourg, Luxembourg
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Kala-azar – “Visceral
leishmaniasis” Caused by a protozoan
parasite “Leishmania
donovani”
Transmitted by tiny
blood-sucking insects
“sand-fly”
Second largest global
parasitic killer – after
Malaria
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Kala-azar
Hepatosplenomegaly + Pancytopenia Fever & Cachexia
Parasite migrates to:
• Liver
• Spleen
• Bone Marrow
VISCERAL
DEATH
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Operational Challenges
Treatment: Since decades
= Sodium stibogluconate
Injections for 30 days
Unpredictable toxicity
High mortality
Growing resistance (India)
Vector: No effective
measures to eradicate the
sand-fly
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KALA-AZAR
A NEGLECTED DISEASE
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Liposomal Amphotericin B
(AmBisomeTM)
New safer drug
High efficacy / Low toxicity
Shorter duration – 10 days
First choice in high income countries
BUT
Evidence on efficacy in East Africa is limited
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Gedaref state, East Sudan (2010)
MSF started a program
for diagnosing and
treating Kala-azar
(Tabarak Allah)
Vertical program
KA and coinfections
Hospital-based diagnosis
and treatment
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MSF KA treatment program AmBisome is given only for complicated cases
High cost (400$/patient)
Limited availability
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Study objectives
Among Kala-azar patients treated with
AmBisome, in Gedaref state, to report on:
Effectiveness and safety
Proportion of relapse
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Methods
Study Design: Cohort study
Study site: MSF Tabarak
Allah treatment centre
Study population: KA
patients treated with
AmBisome (March 2010-
June 2012)
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Kala-Azar - Diagnosis Parasitological - Gold standard - Bone marrow/Lymph nodes
Serological:
rK39 / DAT
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Kala- Azar (KA) - Primary & Relapse
Primary KA: Newly
diagnosed cases
Relapses: Previously
treated cases presenting
again with the disease
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AmBisome Complicated cases only
Severely ill / relapse / HIV / Pregnancy / ≤ 2 yrs or
≥ 45 yrs
Dose: 3mg/kg/day iv for 10 consecutive days
Initial cure:
Clinical improvement (after 10 days)
Parasitological “test of cure” (aspiration)
Definitive cure: No relapse in 6 months
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Results (Jan 2010- June 2012)
Total cases 1823
Received AmBisome 380 (21%)
Primary cases 283 (75%)
Children < 2 yrs 98 (35%)
Advanced disease 88 (31%)
> 45 years 56 (20%)
Pregnancy 24 (9%)
SSG contraindicated 10 (4%)
HIV 7 (3%)
Relapses 97 (25%)
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Results – Treatment outcomes
Primary cases Total 283
Initial cure 260 (93%) Slow responders 4 (1%)
Deaths 21 (7%) HIV – highest case fatality – 43%
Transfer out 2 (1%)
6 months outcome
Relapse 24 (8%)
Lost to follow up 101 (36%)
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Results – Treatment outcomes
Relapse cases Total 97
Initial cure 93 (96%) Slow responders 8 (8%)
Deaths 3 (3%)
Transfer out 1 (1%)
6 months outcome
Relapse 10 (10%)
Lost to follow up 37 (38%)
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Results - Safety
Side effects: mild and temporary
Eg. Shivering
No discontinuation of AmBisome due to
toxicity
No AmBisome related deaths
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Conclusion
In a rural area of Gedaref state, Sudan:
AmBisome treatment appears effective
High initial cure rates
But relapses are a concern
The treatment is well tolerated and safe
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Advocacy to reduce high costs (400 $/patient) and increase access is urgently needed
Recommendations
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Recommendations
Relapses
Suggests a need for higher drug dosing or combination therapy ?
Lost to follow up is high
There is a need to investigate possible reasons (further research)
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Acknowledgments
Patients and Staff of the
MSF programme
MSF-Union operational
research courses for
supporting this study