3 Questions
Which type of parasite measures approximately 5 by 3 μm in size?
Amastigotes
Which type of parasite has a long slender body and a single free flagellum?
Promastigotes
Which type of parasite has a posteriorly located kinetoplast, a full body length undulating membrane, and a single large nucleus located anterior to the kinetoplast?
Trypomastigotes
Study Notes
- Amastigotes are roundish to oval and measure 5 by 3 μm in size
- Promastigotes are 9 to 15 μm in length with a long slender body and a single free flagellum
- Epimastigotes are wider than promastigotes, measuring approximately 9 to 15 μm in length, with an undulating membrane forming into a free flagellum at the anterior end
- Trypomastigotes measure 12 to 35 μm long by 2 to 4 μm wide and may assume the shape of the letters C, S or U in stained blood films
- Trypomastigotes have a posteriorly located kinetoplast, a full body length undulating membrane, and a single large nucleus located anterior to the kinetoplast
- Amastigotes contain a nucleus, a basal body structure called a blepharoplast, and a small parabasal body
- The dotlike blepharoplast gives rise to and is attached to an axoneme in amastigotes
- The large single nucleus in promastigotes is located in or near the center of the long slender body, and the kinetoplast is located in the anterior end of the organism
- The large single nucleus in epimastigotes is located in the posterior end of the organism, and the kinetoplast is located anterior to the nucleus
- Kinetoplast is an umbrella term often used to refer to the blepharoplast and small parabasal body in amastigotes.
Test your knowledge on the different stages of protozoan parasites with this quiz! Learn about the characteristics and distinguishing features of amastigotes, promastigotes, epimastigotes, and trypomastigotes. From their sizes and shapes to the location of their nuclei and kinetoplasts, this quiz will challenge your understanding of these microorganisms. Whether you're a student or a researcher in the field of microbiology, this quiz is a great way to refresh your
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