Crimean-Congo Haemorrhagic Fever DIAGNOSIS Hervé Zeller National Reference Center - WHO Collaborating Centre for Arboviruses and Viral Haemorrhagic Fevers, Institut Pasteur, Lyon Flaviviridae (dengue, yellow fever, Groupe TBE) Viral Haemorrhagic Fevers Flaviviridae (dengue, yellow fever, Groupe TBE) Viral Haemorrhagic Fevers Arenaviridae (Lassa, Junin, Machupo, Guanarito) Flaviviridae (dengue, yellow fever, Groupe TBE) Viral Haemorrhagic Fevers Arenaviridae (Lassa, Junin, Machupo, Guanarito) Filoviridae (Ebola, Marburg) Flaviviridae (dengue, yellow fever, Groupe TBE) Viral Haemorrhagic Fevers Arenaviridae (Lassa, Junin, Machupo, Guanarito) Envelopped RNA viruses Filoviridae (Ebola, Marburg) Bunyaviridae (CCHF, RVF, Hantaviruses) Family Genus VIRUS DISTRIBUTION Flaviviridae Flavivirus Yellow Fever Dengue 1,2,3,4. Africa South America Tropical areas Omsk HF Alkhurma Russia Saudi Arabia Kyasanur Forest HF India Phlebovirus Rift Valley Fever Africa, Saudi Arabia Nairovirus Crimean-Congo HF Africa, Eurasia Hantavirus Hantan Dobrava Puumala Eurasia Sin Nombre, Andes Americas Bunyaviridae Hemorrhages are inconstant : Emerging part of the iceberg …Most frequently asymptomatic infections +++ Biosafety Issues Related to Haemorrhagic Fever Viruses • Criteria for classification – Disease severity – Transmissibility to laboratory workers – Availability of treatment – Availability of vaccine • Classification BSL 1 to BSL4 CCHF VIABILITY SENSITIVITY TO DESINFECTANTS: sodium hypochlorite 2%, glutaraldehyde 2%, formaldehyde SENSITIVE TO DESSICATION INACTIVATION : IRRADIATION UV TEMPERATURE : 1 hour 60°C not complete inactivation beta propiolactone 4°C not complete inactivation Nairovirus structure G1 N G2 M S L L 10 nm CCHF Nairovirus genome _____________________________________________ Segment Nucleotides Amino acids Protein _____________________________________________ S 1659-1712 M 4888 442-482 N 1551 G1 G2 NSm? L 12255 4036 L? _____________________________________________ VHF SUSPECT CASE VHF SUSPECT CASE Malaria – Hepatitis – Typhoidis – Toxicosis Septicemia – Leptospirosis Rickettsiosis… VHF SUSPECT CASE Malaria – Hepatitis – Typhoidis – Toxicosis Septicemia – Leptospirosis Rickettsiosis… Epidemiological data, risk evaluation biological analysis, differential diagnostic VHF SUSPECT CASE Malaria – Hepatitis – Typhoidis – Toxicosis Septicemia – Leptospirosis Rickettsiosis… Epidemiological data, risk evaluation biological analysis, differential diagnostic Contact between clinicians and biologists CCHF : laboratory data LEUCOPENIA, particularly neutropenia THROMBOCYTOPENIA Hematocrite increases early then falls down ASL, AST levels increases Proteinuria and hematuria Mild azotemia, bilirubine increase CCHF : laboratory diagnosis Viral detection: blood specimen – RT-PCR (nested) – Cell culture (Vero E6 cells) CCHF : laboratory diagnosis Viral detection: (blood specimen) – RT-PCR (nested) – Cell culture (Vero E6 cells) Antibody detection : (serum sample) - IFA - ELISA IgM (immuno-capture) IgG - NT CCHF : laboratory diagnosis Viremia 10-12 days (although afebrile). Can be detected by PCR up to day 16 By day 9 all patients will have IgM or IgG antibody Information needed : DATE OF ONSET OF FEVER CCHF : viral/antibody kinetics IgM IgG viremia 0 5 10 RT-PCR 16 Viral isolation ELISA IgM IgG IgM duration: 2-3 months up to 6 months… IFA Primers for RT-PCR on S segment Segment S ARN CCHF 100 300 500 700 5' 3' 135 290 550 F2 670 R3 F3 R2 Fragments amplifiés: F2 / R3 (536 bp) , F3/R2 (259 bp) Séquences des amorces: F2 5' TGG ACA CCT TCA CCA AAC TC 3' R3 5' GAC A AA TTC CCT GCA CCA 3' F3 5' GAA TGT GCA TGG GTT AG C TC 3' R2 5' GAC ATC TTC CCT GCA CCA 3' From J. Smith, 1990 RT-PCR /Southern blot hybridization/antibody : retrospective study Day of illness PCR + Virus + PCR + Virus - 3 1 1 4 1 1 5 3 6 5 3 7 5 4 8 1 2 9 5 10 3 11 1 12 13 1 PCR Virus + PCR virus - Ab + 1 Total tested 3 1 2 2 3 5 3 8 15 8 9 4 7 7 1 5 6 3 3 1 5 5 1 1 2 2 4 3 8 8 3 8 8 2 4 1 14 4 1 15 2 1 3 3 16 2 1 3 3 1 1 1 22 65 80 18 Total 18 34 6 From Burt et al, J Virol Methods 1998, 70:129137 RT-PCR /Southern blot hybridization/IFA antibody : 26 samples from 19 patients from day 3-12 of illness day of illness 3 PCR + Virus + PCR + Virus - PCR Virus + PCR virus - IFA Ab + 1 4 Total tested 1 1 1 5 1 6 4 1 7 3 1 8 6 1 9 1 2 5 1 5 5 2 8 9 2 2 2 10 11 1 1 1 12 1 1 1 8 19 26 Total 14 1 3 From : Burt et al, J Virol Methods 1998, 70:129-137 Hyalomma sp. ticks RT-PCR Viral isolation 536 pb amplicons of the S fragment of CCHF genome using primers CSDR3/CSDF2. RFLP with Hinf I, Hae III, and Alu I endonucleases PROFIL RFLP ORIGINE 321 Grèce AnD 15786 111 Sénégal ArD 8194 131 Sénégal ArTeh 193-3 131 Iran HD 49199 131 Mauritanie ArMg 951 123 Madagascar C 68031 224 Chine ArB 604 223 Rép. Centrafr. HD 38562 223 Burkina Faso ArD 39554 222 Mauritanie ArD 97264 222 Sénégal ArD 97268 222 Sénégal DUGBE AP 92 (100) (100) (96) (57) (84) (100) (99) (100) (100) HAZARA Rapport IP Dakar 1993 Turkey 2003 Phylogenetic analysis of 46 partial sequences (219 bp) of the S segment of CCHF virus Phylogenetic analysis of 46 partial sequences (219 bp) of the S segment of CCHF virus. Seven major genetic groups. Strains from the Middle and Far East and from different African regions cluster in clearly separated groups. TURKEY 2003 Preliminary data: 96-98% homology with strains from the Balck Sea area and Kosovo KOSOVO AF404507; STAVROPOL AF481802 ; DROSDOV U88412 ; ROSTOV AY277672 Drostein et al, J Clin Microbiol 2002, 40 1122 National Reference Center - WHO Collaborating Centre for Arboviruses and Viral Haemorrhagic Fevers, Institut Pasteur, Lyon Marie-Claude Georges Isabelle Schuffenecker Ingrid Marendat Séverine Murri Hervé Zeller BSL 3 BSL 4