A single mature female can produce up to 5,000 microfilariae in one day, each of which can survive in the dog's bloodstream for years, continuing to produce
more microfilariae.
The microfilaria swim to the lungs, where they mature and reproduce, sending
more microfilariae into the dog's bloodstream to be ingested by a mosquito.
It takes a total of 6 months for larvae to mature into adult heartworms which produce
more microfilariae.
Adult worms can live for up to 7 years in the host mammal, reproducing and sending
more microfilariae into the blood stream.
When fully developed, the infective larvae enter the bloodstream and move to the heart and vessels, where they grow to maturity and start reproducing
more microfilaria.
Adult female worms produce
more microfilaria which circulate in the bloodstream until they are also picked up by a mosquito.
Not exact matches
This is the only way
microfilariae can begin to develop into adult heartworms... they must be picked up by a second mosquito to develop into larger, and
more mature larvae, called L2 and L3.
If preventatives are stopped for
more than a couple months,
microfilaria counts can increase to a hazardous level.
More commonly,
microfilariae are eventually eliminated, even from non-adulticide-treated dogs, after several months of treatment with prophylactic doses of the macrocyclic lactones.
The modified Knott test and millipore filtration are
more sensitive because they concentrate
microfilariae, improving the chance of diagnosis.
There is
more to transmission than just mosquitoes; it must also be warm enough for a long enough time period to allow the development of
microfilariae to infective L3's within the mosquito's body.
Heartworm larvae (
microfilaria) are in the bloodstream of infected animals... Read
More.
While young heartworms (
microfilariae) can be killed off at home using a monthly prophylaxis, adult heartworms are
more stubborn and require hospitalization.
In a recent research study, mosquito repellants / insecticides were found to be
more than 95 % effective in preventing the transmission of
microfilariae to mosquitoes over a period of one month.
There is
more to transmission than simply the presence of mosquitoes; it must also be warm enough for a long enough time period to allow the development of
microfilariae to infective L3's within the mosquito's body.
If they test positive for the heartworm antigen, a
more sensitive test can be performed to detect whether
microfilaria are in circulation.
Mosquitoes ingest immature heartworm larvae, called
microfilariae, by feeding on an infected cat or,
more commonly, an infected dog.
Most veterinary clinics can run an Antigen test in the hospital to detect
microfilaria in dogs; however, detection of heartworm is
more difficult in cats and requires an Antibody test that is usually sent to an outside laboratory.
Mosquitoes feeding on an infected dog pick up
microfilaria and transmit heartworms to yet
more animals.
Additionally, by repelling and killing mosquitoes, the topical parasiticide was
more than 99 percent effective in blocking the transmission of
microfilariae from dogs to mosquitoes in this study.