Key Opinion Leader Support

Hartz routinely reaches out to veterinarians and veterinary specialists for their insights, opinions and expertise. We are currently very fortunate to have the specialized assistance of several leading veterinary specialists who have been instrumental in the development of technical monographs and educational materials related to parasite control and management.

Click on the audio links below to hear from our panel of experts on flea and tick control.

Elizabette Cohen, DVM
Veterinary Behavior Specialist, Author


New York licensed and U.S.D.A. accredited veterinarian who practices in New York City and Long Island. She lectures on many animal-related subjects and offers her services to several non-profit organizations. She is a pet expert and behavior modification consultant.

In your opinion, how important is year-round application of flea and tick control?
Use of Flea and Tick Products Year Round (Audio)



Jorge Guerrero, DVM, DEVPC,
Adjunct Professor of Veterinary Parasitology, University of Pennsylvania


Has authored or co-authored more than 170 refereed original research articles and book chapters, and is currently co-authoring a book on helminth parasite infections in dogs and cats.

In your opinion, are veterinarians doing enough to actively recommend monthly flea and tick control?
Veterinarian's Role as the Educator (Audio)

To convince veterinarians on the importance of their role in parasite control, what would you say?
Veterinarian's Need for Continuing Education (Audio)



Rosanna Marsella, DVM
Professor, Veterinary Dermatology Service Chief, University of Florida

Rosanna Marsella

Widely-published in many veterinary clinical journals and has primary research interests in the following areas: Immunology of allergic skin diseases; Canine atopic dermatitis; Pathogenesis and novel treatments.

What is your advice for pet owners with a full flea infestation?
Importance of Environmental Flea Control (Audio)



Michael Rust, PhD
Professor of Entomology, University of California – Riverside

Dr. Rust

Recognized as one of the most influential people in the pest control industry. He has authored or co-authored 166 peer-reviewed research articles, book chapters, and reviews.

What has influennced changes/improvements in parasite
protection for pets?
Awareness of Parasite Dangers (Audio)

How will parasite protection for pets continue to change/improve in the years ahead?
Importance of Blood-Meal Prevention (Audio)



Ed Breitschwerdt, DVM, DACVIM
Professor of Medical & Infectious Disease, North Carolina State University


Research emphasis has been on vector-transmitted, intracellular pathogens.

How prevalent are parasite-borne diseases this year compared to past years?

Increasing Geographical Distribution of Ticks (Audio)

Parasite geographical distribution and the importance of continually using a flea and tick product with an adulticide and IGR (Audio)