Lice Flashcards

1
Q

Lice Order

A

Phthiraptera

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2
Q

Lice Families

A

Mallophaga (chewing)

Anaplura (sucking)

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3
Q

Do lice have wings?

A

No

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4
Q

Body flattened…

A

Dorso-ventrally

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5
Q

Legs..

A

Have claws

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6
Q

Antennae?

A

Short

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7
Q

Can humans catch cat lice?

A

No, they are host specific

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8
Q

Anaplura head shape

A

Narrow

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9
Q

Anaplura mouthparts

A

Project anteriorly

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10
Q

Anaplura feed on

A

Blood and lymph

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11
Q

Mallophaga head shape

A

Broad

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12
Q

Mallophaga mouthparts

A

Project ventrally

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13
Q

Mallophaga feed on

A

Dead, keratinised skin cells

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14
Q

Eggs are found…

A

Cemented to hair

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15
Q

What hatches from eggs?

A

Nymph after 7-20 days

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16
Q

How many nymph stages?

A

3

17
Q

Nymph becomes…

A

Adult after 2-7 weeks

18
Q

The entire lifecycle occurs…

A

On the host

19
Q

Numbers peak in…

A

Winter

20
Q

Pathogenesis

A
  • Irritation
  • coat damage
  • anaemia (sucking lice)
  • spread of M-O (Typhus)