Mosquito
bites an
infected dog
and ingests
Microfilariae.
Within
10-14
days the
Micro-
filariae develop
into infective
larvae inside the
mosquito.
Infected
mosquito
bites
another
dog, cat or other
susceptible
animal, and larvae
enter through the
bite wound.
Within
6-7months
infective
larvae will
develop into
adult heartworm
within the
bloodstream
and migrate to
the heart.
Heartworms
may live in a dog
for up to 7 years.
Cycle
repeats as
mosquito
bites
another dog.
1 2 3 5 4
Cycle repeats
normal
heart
heart with
heartworm
infestation
To view a large range of heartworm preventative products, please visit www.vetnpetdirect.com.au.
