1. Mostly, parasites have a negative impact on economics. These organisms infect cattle and other domestic animals. The infection affects the animals, as they lose weight and become sick. Some parasites infection may cause the death of animals. As a result, farmers lose money due to diseases, whereas farming costs increase. The same is true for the parasites that infect agricultural plants. Human parasites also affect business as they cause the disease that reduces work efficiency.
2. Opisthaptor (or haptor) is an organ found in the monogeneans (a group of parasitic flatworms). This organ is responsible for the attachment of the organismу to their host. Opisthaptor contains small anchors, suckers, clamps, or hooklets depending on the monogeneans species.