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Life cycle of T. gondii in cat. a-Ingestion of tissue cysts. b-The cyst wall is digested in the stomach and intestines and bradyzoites are liberated. c-Bradyzoites invade epithelial cells of the intestine. dBradyzoites divide by schizogony producing merozoites. e-Merozoites differentiate into microgamonts or macrogametes (f). g-Fertilization then unsporulated oocyst excreted with cat's feces (h). i-Sporulation occurs and two sporocysts are generated with four sporozoites each (j). (Attias et al., 2020).
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ABSTRACT
Toxoplasma gondii can be described as one of the most efficient parasites in terms of adaptation to the host tissues. Indeed, it has a broad host spectrum, and passes through three developmental stages in its life cycle: the tachyzoite, the tissue cyst, and the oocyst. Trophozoites and tissue cysts, the asexual stages, can survive in
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Contexts in source publication
Context 1
... bradyzoites or sporozoites ( Goldstein and Abrahamian, 2015). In both cases, intestinal epithelial cells will be the first invaded, and they will develop into schizonts, which are characterized by the presence of many nuclei and are an asexual reproductive stage ( Attias et al., 2020). Each cell continues nuclear division throughout shizogony (Fig. 2). Following several rounds of nuclear division, each merozoite's inner membrane complex can form in parallel with the apical complexes, which include rhoptries and micronemes-two traits that define a typical Apicomplexa. Inside the host cell, these cytoplasmic structures arrange themselves around each nucleus to give rise to daughter ...
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... gametogony started, five distinct forms of T. gondii schizonts have been identified in feline intestinal epithelial cells. The schizonts and merozoites are primarily located in the ileum and some of them start to develop into gametes three to fifteen days after the feline's initial infection (Dubey, 2008) (Fig. 2). Then, from a single merozoite, a single nucleus, endoplasmic reticulum, mitochondria, lipid bodies, amylopectin inclusions, and wall-forming bodies type I (diameter of 0.35 µm and electron dense) and type II (width of 11.2 µm, less dense and in smaller number), oval-shaped macrogametes (8 µm long and 6 µm wide) are produced. ...
Context 3
... bradyzoites or sporozoites ( Goldstein and Abrahamian, 2015). In both cases, intestinal epithelial cells will be the first invaded, and they will develop into schizonts, which are characterized by the presence of many nuclei and are an asexual reproductive stage ( Attias et al., 2020). Each cell continues nuclear division throughout shizogony (Fig. 2). Following several rounds of nuclear division, each merozoite's inner membrane complex can form in parallel with the apical complexes, which include rhoptries and micronemes-two traits that define a typical Apicomplexa. Inside the host cell, these cytoplasmic structures arrange themselves around each nucleus to give rise to daughter ...
Context 4
... gametogony started, five distinct forms of T. gondii schizonts have been identified in feline intestinal epithelial cells. The schizonts and merozoites are primarily located in the ileum and some of them start to develop into gametes three to fifteen days after the feline's initial infection (Dubey, 2008) (Fig. 2). Then, from a single merozoite, a single nucleus, endoplasmic reticulum, mitochondria, lipid bodies, amylopectin inclusions, and wall-forming bodies type I (diameter of 0.35 µm and electron dense) and type II (width of 11.2 µm, less dense and in smaller number), oval-shaped macrogametes (8 µm long and 6 µm wide) are produced. ...
