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Crimean-Congo Hemorrhagic Fever
Mossa Sultany
CONTENTS History
Organism
Vectors
Transmission
Clinical findings
Diagnosis
Prevention
Treatment
HISTORY 1944
First described in Crimea
200 soviet military personnel
1956
described for the second time in Congo
1969
Named CCHF
THE ORGANISM
Crimean-Congo hemorrhagic fever virus
Family Bunyaviradae
Genus Nairovirus
VECTORS
transmitted by ticks
Hyalomma
• Trans-ovarial transmission
• Trans-stadial transmission
CCHF VIRUS CYCLE
TRANSMISSION IN HUMANS
Tick bites
Contact with infected crushed ticks
Contact with infected animal
Human to human
Ingestion of unpasteurized milk
CLINICAL STAGES IN HUMANS
Incubation period
Prehemorrhagic phase
Hemorrhagic phase
Convalescent phase
INCUBATION PERIOD
Depends on route of exposure
Tick bites
• 1-3 days (up to 9 days)
Blood or tissue
• 5-6 days (up to 13 days)
PREHEMORRHAGIC PHASE
High fever
Chills
Myalagia
Neck pain and stiffness
Headache
Abdominal pain
No-bloody diarrhea
Hypotension
Relative bradycardia
Conjunctivitis
Pharyngitis
HEMORRHAGIC PHASE Petechial rash
Petechiae
Ecchymoses
Epistaxis
Hematemesis
Melena
Hemoptysis
Hematuria
CONVALESCENT PHASE
10-20 days after illness onset
Generalized weakness
Tachycardia
Other nonspecific symptoms
Recovery usually complete but slow