Definition

1. Noun:
   • A taxonomic class or group of parasitic protozoans: Sporozoa refers to a large group of exclusively parasitic, spore-forming protozoans. They are typically non-motile in their adult forms and include many significant pathogens.
   • Members of the class Sporozoea: In modern taxonomy, the term often relates to organisms within the class Sporozoea, characterized by a complex life cycle involving both sexual and asexual reproduction.

Usage Examples

• Noun:
  • Malaria is caused by a sporozoa of the genus Plasmodium.
  • The life cycle of many sporozoa involves both a vertebrate and an invertebrate host.

Advanced Usage

• In scientific literature: The term "sporozoa" is sometimes used in a historical or broad morphological sense, though modern classifications may place these organisms into more specific groups like Apicomplexa.
  • Early parasitology texts grouped these parasites under the general heading of sporozoa.

Variants and Related Words

• Sporozoan (n): An individual organism belonging to the Sporozoa.
  • The sporozoan invaded the host's liver cells.
• Apicomplexa (n): The current phylum name that includes many organisms historically called sporozoa, characterized by an apical complex used for penetrating host cells.

Synonyms

• Apicomplexan (especially in modern taxonomic contexts).
• Parasitic protozoan (a broader descriptive term).

Related Phrases

• Sporozoite (n): The infective, motile stage of a sporozoan life cycle, often transmitted by a vector.
  • The sporozoite is the form injected by the mosquito.

Noun

1. strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites