Parasites can spread from person to person mainly through contact with contaminated items such as food, water, or soil, or through contact with an infected animal or person.
One of the most common ways for parasites to spread from person to person is through the fecal-oral route. This means that if a person ingests food or water that has been contaminated with the feces of an infected person, the parasites can enter that person's body. For example, if a person drinks water from a contaminated source or eats food that has been prepared by someone who has not washed their hands after using the bathroom, the parasites can enter the person's body.
In addition, parasites can spread through contact with an infected animal. For example, if a person touches an infected animal, such as a pet or livestock, and then touches their own eyes, nose, or mouth, they can become infected.
Finally, parasites can spread through direct contact with an infected person. For example, if an infected person touches a surface such as a doorknob and then someone else touches that same surface and then touches their own eyes, nose, or mouth, the parasites can enter their body.
Overall, parasites can spread from person to person through contact with contaminated items, contact with an infected animal, and contact with an infected person. It is important to practice good hygiene, such as washing your hands and avoiding contact with contaminated items, to reduce the risk of becoming infected.