Maturing Baby Lice in their Nit Egg can breath outside air before they hatch
The pod shaped lumps on the top of the Nit Egg are actually breathing holes called Spiracles, that the baby louse can open and shut at will.
Nit Eggs in Detail
Headlice Eggs (Nits) are and evolutionary masterpiece... waterproof, extremely tough and resilient.
The Nit Eggs have multiple Spiracles on the cap of the egg shell allowing a growing louse the ability to breathe whilst in the egg. Like a chicken egg the louse begins its life as a fertilised liquid.. in fact once mating act results in all 30 or so eggs within the breeding female louse being fertilised all at once. She then lives for about another thirty days laying her little bundles at around 3-4 a day.
Why repeat headlice treatments after seven days?
The louse within the nit egg, once old enough, can open and close the breathing spiracles as required and therefore they can survive being submerged in water, hair products such as shampoos and conditioners and even head lice treatments.
This is why it is so important to repeat headlice treatments again after seven days in warmer weather and fourteen days in cooler climates, giving the little louse time to hatch, so you can catch the little sucker before it gets a chance to grow into a fully breeding adult louse.
Close-up of Nit Egg Breathing Spiracles
Opening and shutting these spiracles protects the baby louse from head lice treatments.
This is why it is important to retreat after seven days, once the baby louse has hatched.
Or use the Nit Ninja Quick-fix strategy to make sure you stay headlice infestation free.
Nit Eggs lock to the Hair Strand
Once water, or water based products are applied to the hair the strand swells giving the nit egg serious staying power. We call this the Wedding-Band Effect.
This swelling effect can be avoided by using water-free Nit Picker Combing Solution
Inside a Newly Laid Lice Egg
In the first few days of incubation the louse embryo is forming but not yet breathing external air and can not be suffocated or killed with treatments.
This is why retreating the hair seven to ten days later is vital to prevent a reoccurring headlice infestation.