The prepatent period is seven weeks, and the worms can live in the dog for more than two years.

The prepatent period from egg infection is about eight weeks.

The prepatent period of the genus is about four weeks.

The prepatent period in the vertebrate host is 8 days.

The prepatent period for T. leonina is two to three months.

Prepatent period varies 3-7 months and is dependent on host species.

The minimum prepatent period of P. equorum is 10 weeks.

The prepatent period ranges from 6-19 months and the worms have a longevity of about two years.

The prepatent period was determined as 41–45 days in skunk maintained under summer conditions.

Whichever route is taken the prepatent period is 14-21 days.

The time between infection and when the parasite can be detected (the prepatent period) is about 9-11 days.

The main effect is seen during the prepatent phase, when the larvae are in the mucosa.

The prepatent period is 18 days; sporulation occurs after three days.

The prepatent period was 9 days and the patent period at least 13 days.

The prepatent period is about 51 days.

The prepatent period is around 3-4 weeks.

The prepatent period is between 2-4 months.

Similar to that of D. viviparus except that the prepatent period is five weeks.

The prepatent period was 137–234 days and the microfilaraemia was nonperiodic.

The prepatent period is 2-3 weeks in sheep and four weeks in cattle.

The prepatent period was approximately 4 months.

The prepatent period ranges from 1-2 months.

The prepatent period of C. petrowi was 19–25 days in five experimentally infected black bears.

Since much of the pathogenic effect occurs within the prepatent period, the faecal egg count may be very low.

There is no tissue migration in the calf following infection and the prepatent period is 3-4 weeks.