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Derm Pharm 2020 > 3 - Insect Repellents > Flashcards

3 - Insect Repellents Flashcards

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Dermatology Board Prep flashcards
1
Q

There is no scientific evidence that ingesting garlic or vitamin B1 (thiamine) repels insects

A

True

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2
Q

DEET based repellents seem to be less effective in women than in men

A

True

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3
Q

Alcohol ingestion increases the likelihood of being bitten by mosquitos

A

True

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4
Q

DEET is the gold standard of insect repellents

A

True

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5
Q

DEET is a broad spectrum repellent

A

True

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6
Q

The higher the concentration of DEET, the longer-lasting is the protection

A

True (though efficacy increases only minimally at concentrations over 35%)

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7
Q

The duration of efficacy of DEET increases only minimally at concentrations over 35%

A

True

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8
Q

Products with 10-35% DEET provide adequate protection under most conditions

A

True

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9
Q

DEET may be applied directly to skin or clothing

A

True

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10
Q

Applying DEET under clothing increases the risk of percutaneous absorption

A

True

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11
Q

Children over the age of 2 months can safely use up to 30% DEET

A

True

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12
Q

DEET may damage plastics, rayon, spandex, painted and varnished surfaces

A

True

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13
Q

DEET does not damage natural fibres such as wool or cotton

A

True

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14
Q

The efficacy of DEET and sunscreen product when applied sequentially may result in a reduction in efficacy of both products

A

True

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15
Q

The reapplication of sunscreen after DEET was applied significantly reduced the protection time of the DEET

A

True

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16
Q

DEET is not mutagenic or oncogenic

A

True (no evidence of mutagenicity or oncogenicity)

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17
Q

There is no developmental, reproductive or neurological toxicity associated with DEET use

A

True

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18
Q

There are no differences in survival, growth or neurological development that could be detected in infants born to mothers who used DEET

A

True

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19
Q

There is no substantial evidence that DEET causes neurotoxicity

A

True

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20
Q

DEET has been associated with bullous contact dermatitis when this has not been subsequently washed off

A

True

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21
Q

DEET is a known eye irritant

A

True

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22
Q

IR3535 is a biopesticide and analogue of the amino acid beta-alanine

A

True

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23
Q

DEET is superior to IR3535

A

True (higher concentrations of IR3535 do not match DEET)

24
Q

Piperidine (Picaridin) is a biopesticide structurally similar to pepper

A

True

25
Q

Piperidine (Picaridin) offers comparable efficacy to DEET against mosquitos

A

True

26
Q

Piperidine (Picaridin) is superior to DEET against ticks

A

True

27
Q

Piperidine (Picaridin) has no detrimental effects against plastics, unlike DEET

A

True

28
Q

Piperidine (Picaridin) has low dermal absorption

A

True

29
Q

Citronella, Bite Blocker, BioUD, and Oil of Lemon Eucalyptus are plant-derived repellents

A

True

30
Q

Citronella (plant-derived repellent) is less effective than DEET

A

True (shorter protection time than DEET)

31
Q

Citronella (plant-derived repellent) provides the shortest protection time as compared to other repellents

A

True

32
Q

Citronella candles and plants (plant-derived repellent) offer no significant protection against mosquito bites

A

True

33
Q

Bite Blocker (plant-derived repellent) combines soybean oil, geranium oil and castor oil

A

True

34
Q

Bite Blocker and Oil of Lemon Eucalyptus based repellents appear to be the most efficacious of the botanical repellents

A

True

35
Q

Some consumers may object to the odour of Bite Blocker and Oil of Lemon Eucalyptus based repellents

A

True (although these appear to be the most efficacious botanical repellents)

36
Q

BioUD (plant-derived repellent) is isolated from wild tomato

A

True

37
Q

BioUD (plant-derived repellent) is more effective than DEET for some species of ticks

A

True

38
Q

Oil of the Lemon Eucalyptus based repellents evaporate more slowly from the skin surface than Citronella and offers longer lasting protection

A

True

39
Q

DEET and Oil of the Lemon Eucalyptus based repellents may cause significant eye irritation

A

True

40
Q

Oil of the Lemon Eucalyptus based repellents should be avoided in children under the age of 3

A

True

41
Q

BioUD (plant-derived repellent) isolated from wild tomato shows promise as an effective alternative to DEET in repelling both mosquitos and ticks

A

True

42
Q

Permethrin (Lyclear) is a man-made synthetic pyrethroid

A

True

43
Q

Pyrethrum is a powerful rapidly acting insecticide originally derived from crushed dried Crysanthemum

A

True

44
Q

Permethrin is used as a contact insecticide leading to nervous system toxicity and death of the insect

A

True (not an insect repellent)

45
Q

Permethrin has low mamalian toxicity

A

True

46
Q

Permethrin is poorly absorbed by the skin

A

True

47
Q

Permethrin is rapidly metabolised by skin and blood esterases

A

True

48
Q

Permethrin is not applied directly to skin when used as an insect repellent

A

True (applied directly on clothing or other fabrics but not directly to skin)

49
Q

Direct application of permethrin to skin can cause stinging and burning

A

True

50
Q

Permethrin maintains its potency for 2 weeks even through several launderings

A

True

51
Q

The combination of permethrin-treated clothing and skin application of DEET creates an excellent barrier against biting insects including mosquitos and ticks

A

True

52
Q

Permethrin sprayed clothing is very effective against ticks

A

True

53
Q

Immediate type reactions (type I hypersensitivity) from insect bites are mediated by IgE, IgG and histamine

A

True

54
Q

Delayed bite reaction (type IV hypersensitivity) are mediated by cell-mediated immunity

A

True

55
Q

After Bite is an ammonium solution found to reduce the type I hypersensitivity symptoms associated with mosquito bites

A

True

Derm Pharm 2020 (47 decks)

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