2021 The researchers also found the parasite was more prevalent in warmer climates and among animals with aquatic habitats.Ĭorryn Wetzel, Smithsonian Magazine, 1 Dec. 2022 Faced with the shape-shifting X parasite, Samus is hunted by literal husks of her former self. Jennifer Ouellette, Ars Technica, 14 Jan.
Recent Examples on the Web Enlarge / Intestinal parasite eggs recovered from sediment collected below the stone toilet seat at Armon Hanatziv. Weiss Salmonella species are intracellular parasites, and it is thought that these bacteria gain access to their host by penetrating through intestinal epithelial cells. Fisher Like all viruses, the human immunodeficiency virus ( HIV) is an intracellular parasite: the virus particle itself is inert and cannot propagate or do any damage until it enters a host cell. Unlike bacteria or viruses, parasites undergo a metamorphosis during their life cycles that presents the human immune system with a moving target. Some restrict the use of parasite to include only multicellular forms (such as protozoans and helminths) while others use it to include bacteria and viruses. The cowbird lays its much-larger eggs in the vireo's nest, which hatch first and place such a high food demand on its tiny "parents" that the vireo young go unfed. Sadly, the vireo is vulnerable to a nest parasite, the brown-headed cowbird …. Lucas The blood schizogonic cycle of human malaria parasites has thus far been the most exhaustively studied phase of parasite development. David Jones The fungus is an obligate parasite, that is, it must have a living host (tobacco) on which to grow and complete its life cycle. To some (like the tapeworm) it is fatal but smarter ones (like the louse) simply go off in search of a new host. 1 : an organism living in, on, or with another organism in order to obtain nutrients, grow, or multiply often in a state that directly or indirectly harms the host (see host entry 3 sense 2a) Now the death of its host is certainly a setback to any parasite.
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