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oocyst

oocyst

1 9.9
A hard shell that some tiny parasites make to protect the stage that can infect others
  • noun
  • /ˈoʊəˌsɪst/
  • Specialized
: oocisto
  • The resistance of Cryptosporidium oocysts to chlorine and disinfectants leaves a variety of water sources vulnerable to contamination (Heymann, 2004).
  • Cryptosporidium oocysts
  • protozoan oocysts
  • cysts and oocysts

Examples

  • We can accidentally ingest oocysts in contaminated water or unwashed produce, or from playing in sandboxes or cleaning out litter boxes.

  • With increased precipitation and higher temperatures, as seen in patterns in North America, oocysts from these organisms found in fecal matter may be washed into drinking-water supplies, thus exposing the populations to risk through ingestion of contaminated water.

    Academic text (2004)
  • The result may have been that the majority of the oocysts were lost in the debris.

    Academic text (2006)
  • Results were recorded as oocysts per 100 liters.

    Academic text (2006)
  • Cats shedding oocysts generally do so for 5 to 14 days.

    Blog text (34)
  • Newer regulations that require reducing the number of oocysts to a very low level present a real problem for adequate treatment processes.

    Academic text (2000)
  • The recovery rate for oocyst load varied depending on sample turbidity and site (Table 3).

    Academic text (2006)
  • The ProNetic System detects Cryptosporidium oocysts in drinking water.

    Academic text (1997)
  • The recovery of Cryptosporidium oocysts was severely reduced in high-turbidity water affected by AMD containing high levels of total iron (>6.0 mg/L).

    Academic text (2006)
  • The ProNetic System detects Cryptosporidium oocysts in drinking water.

Surface Forms

oocyst singular
oocysts plural

Morphology

oocyst = cyst (opaque) = oo + cyst

The combining form 'oo-' meaning 'egg' is a specialized classical/medical element not known to general learners, so the compound is not guessable from common vocabulary.

Etymology

The word oocyst comes from Greek parts oo- meaning 'egg' and -cyst meaning 'bladder' or 'sac'. So, an oocyst is like an 'egg sac', a tough, protective structure that holds developing parasites.