Distribution of the amount of Mycobacterium avium subsp.paratuberculosis (Map) shed per kg of faeces of transiently infectious (F
), subclinically infected (F
) and clinically affected (F
) animals used in the Map spread model within a dairy herd*. *Distributions are here in log(Map)/kg of faeces (and not in Map/animal/day). Transiently infectious animals produce from 0.5 to 10 kg of faeces per day during 25 weeks on average (f
), whereas Is and Ic animals are cows producing 30 kg of faeces per day (f
) for a longer period of time (Tables 1 and 2). Adults' contribution to total Map shed is thus more important than the one of transiently infectious animals.