For instance, higher bacterial intensities in the tick could result from a higher infection dose received from the infecting host.
All infected mice from the other strains survived this infection dose.
In a high infection dose model, the broiler chickens were orally infected with individual doses of 2,500 freshly prepared oocysts.
GFP protein levels were regulated by the infection dose of recombinant baculovirus, while hEPO expression remained constant.
Subsequently, each piglet was challenged with 1000 ID50 (50% infection dose) FMDV serotype O, named OR/80, which is used to produce vaccine in China.
To reduce any variation due to infection dose, an in vitro standardized dose was used to initiate infection of groups of three local zebu cattle with each isolate.
A concentration as low as 0.03 of the 50% egg infection dose per milliliter (EID50/ml) of the initial volume of water was effectively detected.
The epidemiology of paratuberculosis is complex and the clinical manifestations and economic impact of the disease in cattle can be variable depending on factors such as herd management, age, infection dose, and disease prevalence, among others.
Animals of groups CON INF and DMC INF were given an infection of 200 metacercariae (mc) of F. gigantica as trickle infection dose of 50 mc twice weekly over a period of two weeks.
An infection dose of 106 was made the infection dose of choice in subsequent infections, since the number of re-isolated bacteria with this infection dose was optimal for STM analyses (data not shown).
The infection dose was measured by optical density and checked by plating dilutions on agar plates.
