Which flea is primarily responsible for infestations in homes with pets?

The cat flea is primarily responsible for infestations in homes with pets, particularly those that have cats and dogs. This flea species thrives in environments where pets inhabit, as cats and dogs are its primary hosts. The cat flea can easily transfer between different animals and can also bite humans, which can lead to discomfort and allergic reactions.

This species is especially adaptable and can reproduce quickly in domestic settings. A single female cat flea can lay hundreds of eggs in her lifetime, leading to rapid population growth if not managed effectively. The larvae then develop in areas where pets sleep or spend time, such as carpets and bedding, making it essential to treat both the pets and the home to eliminate the infestation.

The other options refer to different fleas that are generally less associated with household infestations involving common domestic pets. For example, the oriental rat flea typically infests rodents, while the human flea primarily affects humans and is less common in household environments today. The dog flea is often confused with the cat flea but is less prevalent overall.