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61 Cards in this Set

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name the filaria
name the filaria
a. Wuchereria bancrofti (90% of lymphatic filariasis. Sheathed & nuclei stop short of the tail)

b. Brugia malayi (10% lymphatic filariasis. Sheathed & 2 small dysmorphic nuclei in the tail)

c. Onchocerca volvulus (NOT SHEATHED)

d. Loa loa (Sheathed. normal nuclei through tip of tail)
Which filaria is not diagnosed by blood but by skin snip?
Oncocerca
African trypanosomiasis
(2 types: t. brucei rhodensiense (E Africa) vs gambiense (W Africa))

Has anterior flagella and posterior TERMINAL kinetoplast
American trypanosomiasis
= Trypanosoma cruzi

C- shaped
very dark large subterminal kinetoplast
American trypanosomiasis
= Trypanosoma cruzi

C- shaped
very dark large subterminal kinetoplast
Leishmania
Amastigotes with kinetoplasts in macrophage
What parasite is transmitted by the tsetse fly?
African trypanosomiasis

(T.b. rhodensiense & gambiense)
What parasite is transmitted by the reduvid bug?
What parasite is transmitted by the reduvid bug?
American trypanosomiasis
= Trypanosoma cruzi
= Chagas disease
What parasite is transmitted by the sandfly?
What parasite is transmitted by the sandfly?
Leishmania
What diseases are transmitted by the Ixodes tick?
What diseases are transmitted by the Ixodes tick?
Babesia
Lyme
Ehrlichia
Anaplasma
What diseases are transmitted by the Aedes aegypti mosquito?
What diseases are transmitted by the Aedes aegypti mosquito?
Yellow fever
Dengue fever
P. falciparum
banana gametocytes
P falciparum
doubly infected cells
P falciparum
Applique form
Babesia
organisms are smaller (< one fifth RBC) than falciparum (~1/3) and have more variable shapes
Plasmodium ovale
FIMBRIATED RBC
P ovale (fimbriated RBC & Schuffners dots)
P vivax
RBCs are ENLARGED
Schuffner's dots
pigment
P vivax
has most merozoites per schizont (10-20)
What region is spared by P vivax?
West Africa.
Evolved to be Duffy a-/b-, and duffy is the receptor
What malaria types have a latent form in the liver that must be treated?
P vivax
P ovale
What malaria classically shows infection in larger RBCs
P vivax
What malaria has the most pigment
P malariae
What malarias show Schuffners dots
P vivax
P ovale
P malariae
Chunky brown pigment
8-12 merozoites/ schizont
normal sized RBC
P malariae
BAND FORM unique
# of merozoites per schizont
P vivax: 10-20

P malariae: 8-12

P ovale: 6-14
Major nematode / roundworms
– Enterobious vermicularis (pinworm)
– Tricuris triciuria (whipworm)
– Ascaris lumbricoides
– Hookworms
– Strongyloides stercoralis
Pinworm eggs
Enterobius vermicularis
flattened on one side
50-60um x 20-40um
"bilaterally symmetric egg and bilaterally symmetric name"!
"bilaterally symmetric egg and bilaterally symmetric name"!
Trichuris trichiura
Whipworm
2 opercula on opposite sides
infective after 3 weeks in the soil
50um x 20um
Ascaris lumbricoides
gross!
30cm
Ascaris lumbricoides
Fertilized egg (round)
Ruffled outer surface ~ bark ~ LUMBER
Ascaris lumbricoides
Unfertilized egg (elongated)
Ancylostoma duodenale
Hookworm
TEETH!!
Necator americanus
Hookworm
No teeth. Cutting plates.
Hookwork egg
Thick lucent smooth shell
can't speciate
Worm most associated with eosinophilia
strongyloides
only worm that can reproduce repeatedly in the host and autoinfect, or can live entirely in the soil
strongyloides
larvae of hookworm or strongyloides?
larvae of hookworm or strongyloides?
hookworm larvae
-LONG buccal canal
- no genital primordium
hookworm larvae
-LONG buccal canal
- no genital primordium
larvae of hookworm or strongyloides?
larvae of hookworm or strongyloides?
strongyloides larvae
-SHORT buccal canal
- prominent genital primordium
Schistosoma mansoni
LATERAL SPINE

(manson the murderer)
schistosoma haemotobium
TERMINAL spine

(looks like you can draw blood with it)
Which schistosoma are GI parasites? bladder?
S. mansonia and japonicum are GI

S. haemotobium is bladder
Chronic infection with S mansoni?

S haemotobium?
S mansoni & japonicum: eggs get stuck in liver, cause fibrosis, and can lead to cor pulmonale

S haem: Bladder issues, increased salmonella UTIs, and SCC!
schistosoma japonicum
rounder egg than the others, with a small lateral spine or no spine at all
what fluke is strongly associated with cholangiocarcinoma?
clonorchis sinensis
clonorchis sinensis
WIDE operculum
little spine at end
30um
Fasciola or fasciolopsis
Top can Pop!
large eggs
100um
100um
Paragonimus egg
looks like clonorchis but is 3x the size
Large operculum
Diphyllobothrium latum egg
60um
operculum
thin shell
Diphyllobothrium latum egg
60um
operculum
thin shell
spine
Taenia solium
cysticercus
taenia egg
Round
radial striations
hooklets in center!
Pollen!
has radial striations like taenia but no hooklets
taenia solium
taenia saginatium
>15 uterine branches
Taenia solium
7-12 primary uterine branches
liver
liver
hydatid cyst from echinococcus
protoscoleces
hydatid cyst from echinococcus
protoscoleces
hymenolepis egg
round
space between embryo and shell
Pediculus humanus
Body / head louse

One pair of antennae, each with five segments
Six legs project from the fused segments of the thorax
these legs are short and terminate with a single claw and opposing "thumb".
Pediculus humanus
Body / head louse

One pair of antennae, each with five segments
Six legs project from the fused segments of the thorax
these legs are short and terminate with a single claw and opposing "thumb".
Pthirus pubis
Pubic lice

ROUND body
back legs are THICKER and have claws
Which schistosoma eggs are acid fast?
Mansoni & japonicum; hematobium is negative on AFB
submucosa of body of stomach
submucosa of body of stomach
anisakis

fish nematode
Asia

**distinctive Y-shaped lateral cords!