medical parasitology (final revision ) manchester, s6
TRANSCRIPT
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Medical parasitology(Final Revision )
Manchester, S6
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Points you
have to know with each
parasite
Habitat
D.H, R.H, I.H
C/PDrug of choice
Diagnostic , infective
stages
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Helminths
Trematodes
Fasciola speciesP. westermani
Cestodes
Taenia species Echinococcus granulosus
NematodesAscaris lumbricoides
Enterobius vermicularisWuchereria bancrofti
Brugia malayi
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Fasciola species
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Fasciola cercaria
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Fasciola egg
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Name ?
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Parasites affecting lung
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Paragonimus egg
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Tapeworms
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Taenia saginata gravid segment
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Taenia solium gravid segment
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Taenia saginata & Taenia solium scolex
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Taenia egg
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1) The next figure represents part of a parasite
Answer the following questions:
A) Mention name of the parasite (Taenia solium)B) Diseases caused by this parasite (intestinal taeniasis and cysticercosis )C) Methods of infection (consumption of imperfectly cooked pig's meat containing the cysticercus cellulosa, ingestion of eggs of T. Solium, external or internal autoinfection)
D) Infective stage (cysticercus cellulosa in case of intestinal taeniasis and egg in case of cysticercosis)
E) Diagnostic stage (gravid segments or rarely eggs in the stool)F) Habitat of this parasite (small intestine)
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Ecchinococcus granulosus
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Unilocular hydatid cyst
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Ascaris adult male and female
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Fertile egg of Ascaris
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Corticated & fertilized
decorticated unfertilized
Ascaris eggs
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Enterobius vermicularis male
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Enterobius vermicularis female
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Enterobius vermicularis egg
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Wuchereia bancrofti microfilaria
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Entamoeba histolytica cyst
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Entamoeba histolytica trophozoites
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Giardia intestinalis trophozoite
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Giardia intestinalis cyst
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Free-living amoebaeNaegleria fowleri
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Acanthamoeba castellani
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Phlebotomous papatasi
Haemosomatic flagellates
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Leishmania Promastigote form
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Leishmania promastigote
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Polymorphic trypanosomes
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Monomorphic trypanosomesTrypanosoma cruzi in blood
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T. Cruzi forms in blood and tissue
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Romana’s signChiclero ulcer
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Plasmodium falciparum gametocyte
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Plasmodium malariae Band form trophozoite
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Plasmodium ring stage
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P. vivax ring
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Complications:
Cerebral malaria Hypoglycaemia
Hyperpyrexia Convulsion
ShockHemoglobinuria
Severe anaemia Acute renal failure
Coagulopathy Spontaneous bleeding
Acute pulmonary oedema Aspiration pneumonia
Hyperparasitaemia Metabolic acidosis
Plasmo
dium
falcipar
um
Glomerulonephritis
Nephrotic syndrome
Plasmod
ium
malaria
e
Relapses
Plasmodi
um vivax
`n ovale
Manar Sobh Azab
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Mosquito-born malariaBlood-transfusion malaria
Malaria
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P. vivax P. ovale P. malariae P. falciparum
Stippling Schuffner dots (fine pink dots)
Schufffner dots (fine pink dots)
Ziemann dots (fine pink dots)
Maurer dots (irregular red clefts)
Ring stage Fills 1/3 of R.B.Cs.
Fills 1/3 of R.B.Cs. ,stippling appears early
Fills 1/3 of R.B.Cs.
Fills 1/6 of R.B.Cs.
- Frequently two chromatin dots
-Accolé forms
Trophozoite
- Amoeboid
- Highly vacuolated
- More compact
- Less vacuolated
- More compact
- Less vacuolated, sometimes band shaped
- More compact
- Less vacuolated
- Not seen in peripheral blood
Schizont - Fills the R.B.Cs.
- Contains 16 merozoites
- Fills 3/4 of R.B.Cs.
- Contains 8 merozoites
- Fills the R.B.Cs.
- Contains 8 merozoites (rosette-shape)
- Fills 3/4 of R.B.Cs.
- Contains 24 merozites
- Not seen in peripherial blood
Gametocyte
Fills the R.B.Cs.
Fills 3/4 of R.B.Cs.
Fills the R.B.Cs.
Crescent or banana – shaped
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Control of arthropods
Larva
Adult
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• W. bancroft, malayi (mosquitoes).
• Giardia, Entamoeba, Enterobius, Ascaris (house fly)• Leishmania (sand fly).
• Trypanosoma gambiense (Glossina).• Trypanosoma cruzi (Triatoma).
. Plasmodium (mosquito Anopheles).
Parasites transmitted by arthropods
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