parasitic insects

Question 1

What do all mosquitoes require to lay eggs, larvae, pupae

Answer 1

water

Question 2

How to male mosquitos differ from female mosquitos

Answer 2

feathery antennae and mouthparts not suitable for piercing skin

Question 3

3 main mosquito genera

Answer 3

Aedes- zika, yellow fever

Anopheles- malaria

culex- lymphatic filariasis

Question 4

How to identify culex, anopheles, aedes larvae

Answer 4

Anopheles- larvae stays parallel to the water

Aedes- has siphon (air tube)

Culex- has longer siphon

Question 5

identify culex, anopheles, aedes adult

Answer 5

anopheles- yellowish. resting position 45 degree angle. dark spot wings incapable of flying long distance

Aedes- black with white patches

Culex- yellowish. resting position parallel. transparent with fine lines able to fly distances

Question 6

identify culex, anopheles, aedes egg

Answer 6

anopheles- eggs laid in a single horizontal line with air bubbles

Aedes- laid singly but no air bubbles

culex- laid in clusters

Question 7

What parasite does genus phlebotomus

Answer 7

Leishmania

Question 8

difference between sandfly life cycle and mosquito development

Answer 8

sandflies dont require aquatic environment to complete life cycle

lay in soil or decaying material

eggs, larvae, pupa, sandlfy

Question 9

3 types of lice

Answer 9

head lice- Pediculus humanus capitis

body lice- Pediculus vestiment

Crab lice- Phthirius pubis

Question 10

Difference between holometabolous and hemimatabolous development

Answer 10

Holometabolous insects undergo complete metamorphosis whereas Hemimetabolous insects undergo incomplete or partial metamorphosis.

Question 11

How do pediculus humanus capitis lay egg

Answer 11

egg laying is temperature dependent

to attach a egg, female secretes glue from reproductive organs

Question 12

What type of development does pediculus humanus capitis

Answer 12

hemietabolous- partial metamorphosis

Question 13

pediculus vestimenti serves as vectors for what disease

Answer 13

Rickettsia prowazekii (causes epidemic typhus) and
Borrelia recurrentis

Question 14

Why does phthrius pubis have big claws
transmission
what type of development

Answer 14

to inhabit more rough hair

sexual intercourse

hemimetabolous

Question 15

What is name for bedbug and their main characteristics

Answer 15

Cimex lectularius
Blood feeding parasites
broadly flattened, oval, reduced wings
shy so only come out at night
oily secretions can be smelt

before= 6mm brown after feeing =swolen +red

Question 16

Cimex lectularius development

Answer 16

• f lays around 200 eggs (has cement to stick)
• Colourless nymphs emerge from eggs and turn into 1st 2nd 3rd 4th 5th stage before turning to adult

Question 17

how can you detect bedbugs and what do they cause

Answer 17

can smell their oily secretions.
may carry leprosy, Q fever, but never implicated to spread disease to humans

Question 18

differne between pedicuas humanus + cimex lectularius

Answer 18

lice SMALLER + legs short and thick
lice hv well developed claws
bedbugs hv thin + long legs

Question 19

Name of flea and its characteristics

Answer 19

Pulex irritans
feeds on blood. adults 4mm. laterally flat, dark brown, wingless. CAN JUMP on host.

Question 20

Pulex irritans development

Answer 20

holometabolous
* f lay 400 eggs 0.5 mm
* larvae hatches and after 3 molts becomes pupae, then adult hatches from pupae.
* duration of development depends on temp

Question 21

Pulex irritans diseases

Answer 21

PLAUGE - flea transmits yersinia pestis
also causes: murine typhus, flea borne rickettsiosis

its int hos of dipildium canium