I l nematode canine, Dirofilaria immitis ,
a parasite of the common dog in many you leave of the world; one
introduces in many other animals, comprised the cats, but it infects
the human beings only very rarely. The adults are enough large,
measuring in length until 20 25 cm and live typically in the
pulmonary artery and the cavit cardiac. HERE
THE LIFE CYCLE
AND HERE The SPREAD AREA
Approximate geographic
distribution of the immitis of Dirofilaria . . The parasite
introduces itself in those zones indicated in the red color,
"probably" it is introduced in those zones indicated in the yellow
color and it is not introduced in those zones indicated in blue.
THE
FILARIA
adult filarie to the inside of the heart
The filarie females
they produce the
microfilariae that they are found in the blood of the dog. The
presence of the microfilarie in the blood comes used like diagnosis
method in order to verify the presence in the parasite in animal
determining. the microfilariae they are ingested from the mosquitos
when they are fed, these mature and they are developed allinterno of
the mosquito that acts as from carrier and the infection transmitted
to a new host when the mosquito feeds itself. Much species of
mosquitos acts as from carriers of this parasite. 
microfilarie 
