Table 1.

Infectivity of C. parvum oocysts stored at room temperature and 4°C

Length of time (wk) at tempMouse infectivity (% infected)Fecal oocyst scorea
Room temp
  01002–3
  5802
 11602
 15201
 2000
4°C
  01002–3
 111001–3
 201001–3
 291001–3
 391001–2
  • a For explanation of oocyst score, see reference 27.