Oral isotretinoin is the best treatment for patients with moderate acne in whom antibiotics are unsuccessful and for those with severe inflammatory acne. Dosage of isotretinoin is usually 1 mg/kg once/day for 16 to 20 wk, but the dosage may be increased to 2 mg/kg once/day.
Lots of different predators will prey upon other predators: Golden eagles are well known predators of smaller hawks. Collared lizards will eat other lizards. Crocodilians will feed on other predators, such as monitor lizards, snakes and even lions that come to the water to drink. Many snakes will eat other snakes. Some frogs, like the horned frogs of South America and the African bullfrog, readily feed on other frogs.
Predators and parasites are two completely different ecological roles or niches. The differences are many between them, but in both predation and parasitism, one particular organism depends on another usually for food. Additionally, because of both parasitism and predation, the victim suffers. Usually, predation involves animals while parasitism is common among all the organisms. Â· Predators are at the top levels of food chains, but parasites have not been included in food chains. Related posts: 1  Difference Between Predator and Prey.