Where do the biting and irritating organisms come from?

From outside, through windows and doors:

  • Gnats, mosquitoes
  • Stable flies
  • Thrips

From birds’ nests or nesting boxes:

  • Bird fleas
  • Poultry mites
  • Pigeon ticks
  • Martin bugs
  • Forest flies

From dog or cat, or from their quarters:

  • Fleas
  • Certain mites

From other humans:

  • Itch mite
  • Head lice
  • Body lice
  • Crab lice
  • Human fleas

From foodstuffs:

  • Certain mites

When travelling (in hotel rooms):

  • Bed bugs
  • Fleas

From second-hand furniture or paintings:

  • Bed bugs

From public lavatories:

  • Crab lice

At home, after being in garden or woodland:

  • Animal fleas
  • Ticks
  • Flower bugs