Leishmaniasis

Organism Leishmania (protozoa) Transmission Via sandflies Leishmania anastigotes infect sandflies when they take them up with their blood meal. Pathogenesis The adult female sand ingests the pathogen in the form as amastigotes when feeding...

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Leprosy

Leprosy is a chronic granulomatous disease Organism mycobacterium leprae = intracellular parasite. Incubation period tuberculoid = 2-5 years lepromatous = 8-11 years   Transmission Spread in nasal discharges to the skin or nose. Infectivity...

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Leptospirosis

Leptospirosis: also known as Weil’s Disease Organism Spirochaete bacterium called Leptospira spp incubation: 7-14 days Transmission Via the urine of an infected animal (contagious as long as it is still moist) Rats, mice, and moles are important...

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Lyme Disease

Organism Borrelia Burgdorferi (spirochaete) Incubation: 7-14 days Transmission Vector=ticks Animal hosts=deer/rodents Epidemiology Commonest vector borne illness in USA Focally endemic in woodland of north America – infections mostly occur in summer. Pathogenesis Tick bite...

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