FMV - Artigos de Revistas Internacionais com Arbitragem Científica

URI permanente para esta coleção:

http://hdl.handle.net/10437/10820

Navegar

Percorrer FMV - Artigos de Revistas Internacionais com Arbitragem Científica por assunto "CICLO DE VIDA"

A mostrar 1 - 1 de 1
  • Item
    The apicomplexan parasite Toxoplasma gondii
    (Edições Universitárias Lusófonas, 2022) Delgado, Inês; Zúquete, Sara; Santos, Dulce; Basto, Afonso Silva Pinto; Leitão, José Alexandre da Costa Perdigão e Cameira; Nolasco, Sofia; Faculdade de Medicina Veterinária
    Toxoplasma gondii is a ubiquitous zoonotic parasite with an obligatory intracellular lifestyle. It relies on a specialized set of cytoskeletal and secretory organelles for host cell invasion. When infecting its felid definitive host, T. gondii undergoes sexual reproduction in the intestinal epithelium, producing oocysts that are excreted with the feces and sporulate in the environment. In other hosts and/or tissues, T. gondii multiplies by asexual reproduction. Rapidly dividing tachyzoites expand through multiple tissues, particularly nervous and muscular tissues, and eventually convert to slowly dividing bradyzoites which produce tissue cysts, structures that evade the immune system and remain infective within the host. Infection normally occurs through ingestion of sporulated oocysts or tissue cysts. While T. gondii is able to infect virtually all warm-blooded animals, most infections in humans are asymptomatic, with clinical disease occurring most often in immunocompromised hosts or fetuses carried by seronegative mothers that are infected during pregnancy.