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DTMH Laboratory > Vectors And Diseases > Flashcards

Vectors And Diseases Flashcards

1
Q

Rickettsia Typhi
Vector?
Disease?

A

Vector - Pulex flea
Disease - Endemic murine typhus

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2
Q

Rickettsia Rickettsi
Rickettsia Africanus
Rickettsia Coroni
are all forms of which disease?
Vector?

A

Disease - Spotted Fevers (tick typhus)
Vector - Hard ticks

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3
Q

Borrelia Recurentis
Vector?
Disease?

A

Disease - epidemic louse borne relapsing fever
Vector - body louse

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4
Q

Borrelia Duttoni
Vector?
Disease?

A

Vector - Soft ticks
Disease - endemic tick-borne relapsing fever

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5
Q

Borrelia Borgderferi
Vector?
Disease?

A

Vector - hard (ixodie) tick
Disease - Lyme’s Disease

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6
Q

Orientia tsutsugamushi
Disease?
Vector?

A

Disease - Scrub Typhus
Vector - Chigger mite (trombidium)

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7
Q

Coxiella Bornetti
Which disease?
Vector?

A
  • Q Fever
  • spread by ticks to animals, but humans usually get it from inhaling dust contaminated with infected animal products

Direct OR Indirect contact with infected animal products, ie breathing in dust that has been contaminated by infected animal feces, urine, milk etc

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8
Q

Rickettsia Prawazekii
Disease?
Vector?

A

Disease - Epidemic Typhus
Vector - Body louse

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9
Q

Loa Loa is spread by

A
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10
Q

Mansonella perstans is spread by

A
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11
Q

Onchocerciasis is spread by

A

Simulium

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12
Q

What are these the eggs/larvae of?

A

Black fly (simulium)

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13
Q

What is this?

A

Culex mosquito

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14
Q

What is this?

A

Anopheles mosquito

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15
Q

What is this?

A

Mansonia mosquito

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16
Q

What is this?

A

Aedes mosquito

(Aedes aegyptii due to the lyre pattern - albopictus has a single white stripe down it)

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17
Q

What is this?

A

Anopheles larva

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18
Q

What is this?

A

Culex larva

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19
Q

What is this?

A

Aedes larva

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20
Q

What is this?

A

Mansonia larva

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21
Q

What is this?

A

Culex eggs

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22
Q

What is this?

A

Anopheles eggs

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23
Q

What is this?

A

Aedes eggs

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24
Q

What is this?

A

Mansonia eggs

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25
What species does this show?
Anopheles
26
What species does this show?
Culex
27
What is this?
Wuchereria bancrofti microfilaria ## Footnote **Nuclei**: - stain purple and are sharply defined - do not extend all the way to the tip of the tail **Sheath** - stained a paler colour
28
What is this?
Brugia microfilaria ## Footnote **Nucelus:** - 2 discrete sub termina nuclui - gap between terminal nuclei **Sheath** - pink stained usually '**kinked**' and tail is **tapered**
29
What is this?
Loa Loa microfilaria | vector - chrysops ## Footnote Sheathed Nuclei extend to tip of the tail (often bent to one side)
30
What is this?
Mansonella perstans microfilaria ## Footnote unsheathed smaller than other microfilariae blunt tail nuclei extend to tip of the tail
31
What fly does this wing belong to?
Tsetse fly
32
What fly do these pictures show?
Tsetse fly
33
What is this?
Brucei trypanosome ## Footnote **pleomorphic** with a **small kinetoplast** located at the **posterior end** with a **centrally placed nucleus**, a **free flagellum** leaves the body at the anterior end.
34
What does this show?
Brucei trypanosome in CSF
35
What does this show?
Brucei trypanosome in lymph node aspirate
36
# [](http://) What does this show?
T. cruzi - amastigote form in 'pseudocysts' in smooth muscle
37
What is this?
Brucei trypanosomes in blood ## Footnote divides in blood
38
What is this?
T. Cruzi trypanosome in blood ## Footnote divides in smooth muscle
39
What is this?
Phlebotomine Sandfly
40
What is seen here?
amastigotes of Leishmania in a spleen biopsy sample
41
What are these?
Intracellular leishmania amastigotes
42
What are these?
Extracellular leishmania amastigotes
43
What fly do these pictures show?
Musca domestica (houseflies)
44
What is this?
Stomoxys (Stable fly)
45
Which are the obligatory myaiasis flies? ## Footnote This means they live on the host for part of their lifecycle
* Tumbu flies * Bot flies * Screw-worms
46
Which are the facultative myaiasis flies? ## Footnote Normally free-living flies but infest living tissue in existing wounds
* blowflies * some fleshflies
47
What is this?
Screw-worm larvae | Larvae of Chrysomya and Cochliomyia flies ## Footnote They invade natural orifices, nose, mouth, eyes, vagina resulting in serious tissue destruction and severe pain
48
What is this?
Cordylobia larva | Cordylobia have smaller spines or spicules over the dorsal surface ## Footnote a cause of furuncular myiasis Cordylobia adults lay eggs on clothes spread out for drying or in dirty soil. The larvae develop in 24-48 hours and penetrate the skin from wearing the clothes.
49
What is this?
Dermatobia larvae | Dermatobia with hooks on each segment. ## Footnote Dermatobia are the larvae of the human bot-fly. Eggs are laid onto other insects ie mosquitoes, larvae enter skin through wound made by mosquito when it bites a human
50
What fly are these from?
Tsetse fly (glossina)
51
What is this?
Non-metallic blowfly (Sarcophagidae) | thorax has three longitudinal stripes ## Footnote commonly known as a **flesh-fly**
52
What is this?
Calliphora (blue bottle fly) ## Footnote feed on dead tissue usually no serious consequences since they feed on pus and necrotic tissue
53
What is this?
Lucilia (green bottle fly)
54
What is this?
Tsetse fly (glossina) larvae
55
What are these?
differing stages of Tsetse fly (*glossina*) pupae
56
What infective stage of parasite does this bug transmit to humans through its faeces | It defecates soon after biting; that's how the parasite enters the body
Infective metacyclic trypanosomes
57
What is this?
Phlebotomine sandfly
58
What is this?
Bed bug (*Cimex*)
59
# [](http://) What is this?
Bedbug - head and mouthparts
60
What is this?
Hard tick | Unfed female
61
What is this?
Hard tick | fed female
62
Humans are more often parasatised by which life stage of a hard tick?
Larvae and nymphs
63
What bacteria do these vectors transmit?
Soft ticks transmit *Borrelia duttonii* | Tick-borne (endemic) relapsing fever
64
What bacteria do these vectors transmit?
Chigger mites transmit*Orientia tsutsugamushi* | Scrub Typhus
65
What disease do these vectors transmit?
Scabies
66
What diseases does this flea transmit
Xenopsylla transmits *yersinia pestis*, plague | no combs, meral rod on 2nd thoracic segment
67
What disease does this flea transmit?
Pulex transmits *rickettsia typhi* (murine typhus) | no combs, no meral rod
68
What is this and what problem does it cause?
*Tunga penetrans* (jigger flea) burrows under toenails causing itching, pain and inflammation
69
What is this?
Body louse
70
What diseases do these cause?
Body lice cause: * epidemic typhus (*rickettsia prowazecki*) * epidemic relapsing fever (*borrelia recurrentis*)

DTMH Laboratory (8 decks)

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