Dengue
description
Transcript of Dengue
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Dengue
• Dengue : Mot d’origine espagnole • Signifie : « manière affectée » • Décrit la démarche des patients atteints
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Arbovirus
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Le virus de la dengue
• Flavivirus• Enveloppé• ARN• 40 à 50 nm• 4 sérotypes : DEN-1, DEN-2, DEN-3, DEN-4• Immunité spécifique de type : pas d’immunité croisée
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Vecteur de la dengue : Aedes Aegypti
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Données CliniquesDengue Classique (DF)
• Incubation 5-7 jours
• Évolution en 2 phases– Fièvre (3-4 jours)– Rémission– Fièvre ( 1 semaine) avec signes biologiques
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Données CliniquesDengue Classique (DF)- Phase 1
• Fièvre : 39-40 °C• Céphalées +++• Douleurs articulaires intenses aux extrémités• Photophobie• Troubles digestifs• Adénopathies
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Données CliniquesDengue Classique (DF) - Phase 2 • Fièvre : 39-40 °C• Céphalées +++• Douleurs articulaires intenses aux extrémités +++• Pharyngite/Conjonctivite• Exanthème maculeux et maculopapuleux• Prurit – Hyperesthésie cutanée• Adénopathies• Hépatomégalie• Asthénie majeure
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Données Biologiques
Hématocrite (> 20 %)
Leucocytes (< 2500/mm3)
Plaquettes (< 100 000 mm3)
Transaminases (> 2N)
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10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 6 7
Tem
p ér at ur e
37
38
39
40
Éruption
Aout Octobre
Hématurie
Asthénie
Myalgies
Conjonctivite/Pharyngite
Leucocytes
Plaquettes
SGOT
SGPT
Sérologie Dengue
0 + + +++++++ + + 0+ +00 +
++ ++ ++ ++ ++ ++
8
0+ +
1760 2560 3280
72000 N N
N N
Négative Positive Positive
185106
490484
131353
4
NN
Mlle Laurence B27 ans Retour d’inde le 11/08/95
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Critères OMS de Dengue Hémorragique
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Diagnostic de la dengue
• PCR• Cultures virales• Sérologie
(IgM spécifiques)IgGSans valeur en zone d’endémie
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