WiseBiology

[ArthurCoigh]

Microfilarial Detection and DifferentiationThe identification of the offspring (microfilaria) of heartworms (Dirofilaria immitis) from a blood sample indicates infection with adult heartworms. Identifying offspring can also be achieved through either one of 2 concentration evaluations: the modified Knott’s evaluation (a technique requiring spinning the blood sample in a mechanical device called a centrifuge) or a filter evaluation. Practitioners will often do a fast examination of a blood smear to look for the existence of the offspring (microfilaria), but this process isn't sensitive enough to rule out heartworms and just verifies the presence of a disease.Another parasitic disease of dogs which is capable of generating circulating microfilariae, detectable upon evaluation of the blood, is named Acanthocheilonema (Dipetalonema) reconditum. A reconditum is a non-disease-causing parasite which develops in the tissues under the skin . Its offspring can be discerned from those made by heartworms through microscopic evaluation assessing size, shape as well as their motion.
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