Author:
Lysenko A. P.,Vysotsky A. E.,Kuchvalsky M. V.,Pritychenko A. N.,Krasnikova E. L.,Pritychenko A. V.
Abstract
When sowing 6% oxalic acid decontaminated homogenates of 7-14-day-old calf tissue mixtures incubated in a growth stimulant VKG on MycCel DW nutrient medium, non-acid-fast and partially acid-fast cell wall deficient myco-bacteria tuberculosis (CWD MBT) which are a marker of tuberculosis infection were isolated in 77,8% of cases. Since the calves were 3-14 days old, there was most likely a transplacental transmission of infection and the persistence of MBT in changed forms that were invisible to routine diagnostic methods. This confirms the risk of tuberculin-positive individuals appearing in herds and relapses of the disease without infection, and also calls for further improvement of anti-tuberculosis measures and the use of methods that detect CWD MBT for the formation of uninfected herds.
Publisher
National Academy of Sciences of Belarus
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