What is the primary transmission method for tapeworms in animals?

The primary transmission method for tapeworms in animals is through the ingestion of fleas. Specifically, this relates to the life cycle of the most common type of tapeworm affecting pets, which is the dipylidium caninum. Fleas serve as intermediate hosts for these parasites. When an animal grooms itself and accidentally ingests a flea that is carrying the tapeworm larva, the larva can develop into an adult tapeworm within the animal's intestines.

This method of transmission underscores the importance of flea control in preventing tapeworm infections in pets. Regular flea prevention strategies can significantly reduce the risk of these parasites establishing themselves in an animal's digestive system.

Other options, while they address possible pathways of disease transmission or infection for different types of parasites, do not accurately describe how tapeworms primarily spread among animals. Therefore, understanding the role of fleas in the life cycle of tapeworms is critical for effective prevention and management strategies in veterinary practice.