For endemic RF Avoidance of exposure to ticks
GENUS LEPTOSPIRA L. interrogans More than 200 serovars General characteristics: . Tightly coiled, thin, flexible spiraled spirochetes forming one polared hooked ends . Grow best in semisolid (Fletcher’s or Stuart’s) media under aerobic condition at 28-30 Oc . Can survive for weeks in alkaline PH water . Fatty acid oxidation is major source of energy Antigenic structure: Lipopolysaccharide: Determine the specificity of human
immune response to classification of leptospirae Pathogenesis and clinical features:
Essentially zoonotic infection and humans are accidental host Source of infection is contaminated foood and water with leprospia spp.
IP=1-2 weeks Leptospirosis is characterized by biphasic illness initially presenting with fever, prostration, jaundice,hemorrhage and nephritis followed by aesptic meningitis Lab. Diagnosis Specimen: Blood, CSF, urine, tissue, serum Smears: Dark field examination