Download - Filariasis Lymphatic Filariasis
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FILARIASIS :
(LYMPHATIC FILARIASIS)
Transmission: mosquitoes transmit the infection duringbiting.CAUSATIVE PARASITE: Wuchereria bancrofti, Brugia malayi andBrugia temori.
Geographic distribution and epidemiology:Bancroftian filariasis is widely distributed throughout the tropicalzone, Africa, Southeast Asia, Pacific Islands, Central and SouthAmerica and some Caribbean islands. Malayan filariasis is found inSoutheast Asia, Indonesia, India, Sri Lanka, Korea and Japan.Worldwide prevalence of lymphatic filariasis is estimated to be120 million infections; 20 million cases are due to Brugia malayi.Some zoonotic forms ofBrugia are found in the U.S. but humaninfections are uncommon.
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Location:The adult worms are found in lymphatics andlymph nodes. Microfilariae are found in the blood.Morphology and life cycle:The adult wormslive in the lymphatics and lymph nodes. The fertilized
females produce embryonic worms called microfilariae.
The microfilaria ~ 250 m in length. Microfilariae circulate
in the peripheral blood.
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Microfilaria Nuclei
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FILARIASISWuchereria bancrofti
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Clinical manifestations:
Most cases are asymptomatic.Earlysymptoms are lymphangitis,lymphadenitis, and in males,
epidydimitis, funiculitis, or orchitis.repeated bouts of lymphangitis result inlymphedema. Eventually, the tissuebecomes infiltrated and fibrous withpermanent enlargement of involvedextremities (elephantiasis). Scrotalinvolvement is common.
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Elephant Foot
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Another One
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Clinical manifestations:
Most cases are asymptomatic.Earlysymptoms are lymphangitis,lymphadenitis, and in males,
epidydimitis, funiculitis, or orchitis.repeated bouts of lymphangitis result inlymphedema. Eventually, the tissuebecomes infiltrated and fibrous withpermanent enlargement of involvedextremities (elephantiasis). Scrotalinvolvement is common.
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ELEFANTIASIS
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ONCHOCERCOSIS
Transmitida por un simlido: Simuliummetalicum Simulium calidum
Simulium ochraceum
Sinonimia: Erisipela de la costaMal morado Ingles colgantesCara de perro Piel de leopardo Ceguera de
los rios
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ONCHOCERCOSIS
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ONCHOCERCOSIS
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ONCHOCERCOSIS
Epidemiologa
Zonas con ros decorrientes rpidas
Zonas cafetaleras
Costas con selvatropical
Sierra de Ixtln enOaxaca
Chamula y Xoconuscoen Chiapas
Centro y Sudamrica
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ONCHOCERCOSIS
Diagnstico
Denodulacin
Raspado de piel
Biopsia
Observacin decmaras oculares conlmpara de
hendidura Serologa
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ONCHOCERCOSIS
Tratamiento
Adultos:Suramina
Microfilarias:DietilcarbamacinaIvermactina
Control de vectores
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ONCHOCERCOSIS
Morfologa
Adultos: Macho
19-42 mm x 150 micrasHembra 335-700 mm x
320 micras Microfilarias:
Machos 150-257 x 6
micras Hembras
260-360 x 8 micras
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ONCHOCERCOSIS
Ndulos
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ONCHOCERCOSIS
Piel de leopardo
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ONCHOCERCOSIS
Ceguera de los rios
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ONCHOCERCOSIS
Lesin en retina
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Diagnosis and Treatment
:Microfilariae in blood films, bloodconcentrations.
Diethylcarbamazine (DEC) is rapidlyeffective in killing the microfilariae;
studies with this drug are being carried
out by WHO. Ivermectin andcombinations of ivermectin and
albendazole are also tried.