3 - Insect Repellents Flashcards Preview

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Flashcards in 3 - Insect Repellents Deck (55):
1

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

True

2

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

True

3

Alcohol ingestion increases the likelihood of being bitten by mosquitos

True

4

DEET is the gold standard of insect repellents

True

5

DEET is a broad spectrum repellent

True

6

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

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

7

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

True

8

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

True

9

DEET may be applied directly to skin or clothing

True

10

Applying DEET under clothing increases the risk of percutaneous absorption

True

11

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

True

12

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

True

13

DEET does not damage natural fibres such as wool or cotton

True

14

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

True

15

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

True

16

DEET is not mutagenic or oncogenic

True (no evidence of mutagenicity or oncogenicity)

17

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

True

18

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

True

19

There is no substantial evidence that DEET causes neurotoxicity

True

20

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

True

21

DEET is a known eye irritant

True

22

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

True

23

DEET is superior to IR3535

True (higher concentrations of IR3535 do not match DEET)

24

Piperidine (Picaridin) is a biopesticide structurally similar to pepper

True

25

Piperidine (Picaridin) offers comparable efficacy to DEET against mosquitos

True

26

Piperidine (Picaridin) is superior to DEET against ticks

True

27

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

True

28

Piperidine (Picaridin) has low dermal absorption

True

29

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

True

30

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

True (shorter protection time than DEET)

31

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

True

32

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

True

33

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

True

34

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

True

35

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

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

36

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

True

37

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

True

38

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

True

39

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

True

40

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

True

41

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

True

42

Permethrin (Lyclear) is a man-made synthetic pyrethroid

True

43

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

True

44

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

True (not an insect repellent)

45

Permethrin has low mamalian toxicity

True

46

Permethrin is poorly absorbed by the skin

True

47

Permethrin is rapidly metabolised by skin and blood esterases

True

48

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

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

49

Direct application of permethrin to skin can cause stinging and burning

True

50

Permethrin maintains its potency for 2 weeks even through several launderings

True

51

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

True

52

Permethrin sprayed clothing is very effective against ticks

True

53

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

True

54

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

True

55

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

True