Rhipicephalus sanguineus, commonly known as the brown dog tick, is a species of tick that primarily infests dogs but can also bite humans and other animals. This tick is found worldwide, especially in warm climates, and is known for its ability to thrive indoors, making it a common pest in households with pets. The brown dog tick is a vector for several diseases, including Ehrlichiosis and Babesiosis, which can affect both dogs and humans. These ticks have a distinctive reddish-brown color and can be identified by their flattened, oval shape. Regular tick prevention and control measures are essential for pet owners to protect their animals and themselves from potential health risks.