Use of degree-days to time aerial spraying in west-central Colorado.

Seasonal fluctuations in Culex and Aedes were followed from 1984 to 1987 using degree-days (degree Days). The annual population maxima of a "mosquito season" can be predicted. Culex first becomes a problem at about 1,550 degree Days and disappears at 2,675 degree Days.

Occurrence of Cryptosporidium in home daycare centers in west-central Colorado.

Thirty white middle-class 5 yr olds from home daycare centers were examined for Cryptosporidium. Five fecal samples were collected from each child, over a 3-wk period, concentrated by sedimentation, and stained by a modified acid-fast technique. Nine children were positive (30%), 6 of these were asymptomatic (5 of these were under 2 yr old).

Effect of Temperature on the Development of Thelastoma bulhoesi (Oxyurata, Thelastomatida) and Other Nematodes.

Embryonation of Thelastoma bulhoesi was monitored at eight temperatures between 0 and 35 C. Cell division did not occur below 15 C or at 35 C. Development was most rapid at 25 and 36 C.

Development of Thelastoma bulhoesi (Oxyurata: Thelastomatida) and the Effect of Thiabendazole on the Unembryonated Egg.

The embryological and postembryological development of Thelastoma bulhoesi was determined. Initial cleavage was into unequal cells and occurred within 1-2 hours at 25 C. Cell division was holoblastic but no true morula is formed.