CEREBROSPINAL LESIONS RESULTING FROM INVASION OF CANINE HEARTWORM LARVAE

Canine Heartworm Disease

Focus on Canine Heartworm Disease

The ingested microfilariae develop into the infective third-stage larvae (L3) after several molts. These L3 migrate to the mosquito head and mouthparts where they are deposited in hemolymph onto mammalian skin during subsequent blood meals. After the deposited L3 enter the host through the mosquito bite wound, they molt to fourth-stage larvae (L4). The L4 then migrate through the tissues toward...

Increasing prevalence of canine heartworm in coyotes from California.

Thirty-seven subadult and adult coyotes (Canis latrans), collected August 1992 through December 1996 from a coastal foothill area in northern California (USA), were examined for adult heartworm (Dirofilaria immitis). During 1992 through 1993, at the end of a 6 yr drought, none of four coyotes examined were infected with heartworms. However, during 1994 through 1996, after the drought had ended,...

Immunologic protection against canine heartworm infection.

This study was conducted to evaluate protective efficiency of three different protocols for vaccination in canine heartworm infection. To evaluate the three protocols of immunization, dogs were separately immunized with living larvae; 1) immunization with gamma-attenuated infective larvae, 2) with 50 micrograms/kg ivermectin-abbreviation, and 3) with chemical abbreviation plus Freund's complete...

Myocardial Lesions Resulting from Dietary Deficiency *

In 1937, Schrader, Prickett, and Salmon3 reported that rats fed on a diet low in potassium exhibited extensive pathologic changes in the intestine, pancreas, kidneys, and heart. Prior to this, Miller2 had reported that rats fed on a low potassium diet were abnormally "alert" and that growth was slow; Leulier and Vanhems' found that their animals survived only 12 to 24 days and did not grow. The...