Blood and Tissue Flagellates II Flashcards
Leishmania have two morphological forms:
- Amastigote
- Promastigote
[5] Causative agent of Leishmania spp.
- Leishmania tropica
- Leishmania mexicana
- Leishmania donovani
- Leishmania braziliensis
- Leishmania guyanensis
Baghdad boils, Oriental sore
Leishmania tropica
Bay sore, Chiclero ulcer,
Leishmania mexicana
Dum dum fever, Kala-azar
Leishmania donovani
Espundia, Uta
Leishmania braziliensis
Forest yaws, Pian bois
Leishmania guyanensis
infective to humans.
Promastigote — Leishmania spp.
have single free flagellum arising from kinetoplast at the anterior end.
Promastigote — Leishmania spp.
promastigote in the proboscis of the insect vector and the one that grow in artificial media.
Promastigote — Leishmania spp.
Lives intracellularly in monocytes, polymorphonuclear leukocytes and endothelial cells of the vertebrate host.
Amastigotes — Leishmania spp.
The reservoir hosts are rodents, dogs, foxes and jackals.
Transmission — Leishmania spp.
The infection is usually transmitted by the bite (blood feed) of the female sandfly, genus Phlebotomus and Lutzomyia.
Transmission — Leishmania spp.
Human infection has been reported from blood transfusion, congenital transmission, contamination of bite wounds and by contact.
Transmission — Leishmania spp.
[2] Clinical types of Cutaneous Leishmaniasis
- Leishmania major
- Leishmania tropica
found in sparsely inhabited areas.
[clinical types of leishmania mexicana]
Leishmania major
Zoonotic cutaneous leishmaniasis.
[clinical types of leishmania mexicana]
Leishmania major
Wet lesions with severe reaction.
[clinical types of leishmania mexicana]
Leishmania major
rapid ulceration; few amastigotes.
[clinical types of leishmania mexicana]
Leishmania major
found in more densely populated regions.
[clinical types of leishmania mexicana]
Leishmania tropica
Anthroponotic cutaneous leishmaniasis.
[clinical types of leishmania mexicana]
Leishmania tropica
Dry lesions with minimal ulceration.
[clinical types of leishmania mexicana]
Leishmania tropica
Many amastigotes; persists for months.
[clinical types of leishmania mexicana]
Leishmania tropica
Disease: New World cutaneous leishmaniasis, chiclero ulcer, bay sore.
Leishmania mexicana
Cutaneous form, increasing in numbers of infected.
Leishmania mexicana
3 clinical manifestastions of Leishmani Mexicana
- Cutaneous – Chiclero-ulcer
- Nasopharyngeal mucosal – rare manifestation
- Visceral – rare manifestation
main reservoir are rodents.
Leishmania mexicana
2 Uncommon types of Leishmania spp.
- Leishmania aethiopica
- Leishmaniasis recidiva
Diffuse cutaneous leishmaniasis (DCL): caused by, diffuse nodular non-ulcerating lesions. Low immunity to Leishmania antigens (anergic) numerous parasites.
[uncommon types of leishmania]
Leishmania aethiopica
lupoid leishmaniasis: severe immunological reaction to leishmania antigen leading to persistent dry skin lesions, few parasites.
[uncommon types of leishmania]
Leishmania recidiva
Causes espundia, uta or mucotaneous/american leishmaniasis.
[leishmania]
Leishmania braziliensis
Found in Central Mexico and Northern Argentina
[leishmania]
Leishmania braziliensis