Lecture 23 Flashcards
(20 cards)
The vector for Heartworm disease
The mosquito
The reservoir for Heartworm disease
Dogs and wild canids
True or false: L2 is the infective stage of HW
False: L3 is the infective stage of HW
How long does it take for L3 to molt into L4?
50-70 days
Adult worms reproduce and release microfilaria by what age?
6 months of age
Heartworm live in the…
Pulmonary artery, right ventricle, and flow into the vena cava
Heartworm can cause…
Platelet activation, ischemia and infarction, right heart failure, and secondary organ dysfunction
Clinical signs of Heartworm in dogs
Exercise intolerance, cough, ascites, collapse, and embolism/dyspnea
True or false: the lifespan of HW in cats is shorter than the dog
True
What will heartworm preventative kill?
L3-L4 (juvenile) and microfilaria
How often should HW preventative be given?
Every 30 days
Puppies can start heartworm prevention at age…
6-8 weeks of age
Prepatent period of HW
6-9 months
Diagnosis of heartworm disease
ELISA antigen snap test for the females only
This test should be done along with an ELISA
Modified Knott’s test/Filter test
Caval syndrome
Large number of heartworm obstruct blood flow in the posterior vena cava
Treatment for caval syndrome
Surgical removal of worms
Wolbachia
Gram negative intracellular bacteria
Wolbachia is also associated with _____ _____ that animals have when HW die
Anaphylactic reactions
The antibiotic treats Wolbachia
Doxycycline
