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Statements

Subject Item
n2:RIV%2F00027162%3A_____%2F14%3A%230001111%21RIV15-MZE-00027162
rdf:type
skos:Concept n18:Vysledek
dcterms:description
It has been suggested that passive shedding of Mycobacterium avium subsp. paratuberculosis (MAP) in faeces may occur, but reliable data are missing. Passive shedding assumes the ingestion of MAP in contaminated feed and passive passage through the gastrointestinal tract without causing infection. In this study the presence of MAP in faeces in a closed herd of Limousin cattle was monitored for 53 months using quantitative real time PCR (qPCR) and culture. The initial prevalence of MAP in the herd was determined to be 63.4% and 4.9% using qPCR and culture, respectively. After the removal of two culture- and qPCR-positive (>10(4) MAP cells/g) cows, the prevalence of MAP using qPCR decreased to 42.1% and later to 15.6% and 6.7%. The continuous removal of suspected animals from the herd during the monitoring period minimised the presence of MAP in faeces to sporadic, which may have resulted from a decrease in the environmental infectious pressure. The findings suggest that the presence of low numbers of MAP in bovine faeces may not necessarily be caused by real infection, but rather by passive passage of MAP. This phenomenon should therefore be considered when interpreting MAP qPCR data. It has been suggested that passive shedding of Mycobacterium avium subsp. paratuberculosis (MAP) in faeces may occur, but reliable data are missing. Passive shedding assumes the ingestion of MAP in contaminated feed and passive passage through the gastrointestinal tract without causing infection. In this study the presence of MAP in faeces in a closed herd of Limousin cattle was monitored for 53 months using quantitative real time PCR (qPCR) and culture. The initial prevalence of MAP in the herd was determined to be 63.4% and 4.9% using qPCR and culture, respectively. After the removal of two culture- and qPCR-positive (>10(4) MAP cells/g) cows, the prevalence of MAP using qPCR decreased to 42.1% and later to 15.6% and 6.7%. The continuous removal of suspected animals from the herd during the monitoring period minimised the presence of MAP in faeces to sporadic, which may have resulted from a decrease in the environmental infectious pressure. The findings suggest that the presence of low numbers of MAP in bovine faeces may not necessarily be caused by real infection, but rather by passive passage of MAP. This phenomenon should therefore be considered when interpreting MAP qPCR data.
dcterms:title
Evidence of passive faecal shedding of Mycobacterium avium subsp paratuberculosis in a Limousin cattle herd Evidence of passive faecal shedding of Mycobacterium avium subsp paratuberculosis in a Limousin cattle herd
skos:prefLabel
Evidence of passive faecal shedding of Mycobacterium avium subsp paratuberculosis in a Limousin cattle herd Evidence of passive faecal shedding of Mycobacterium avium subsp paratuberculosis in a Limousin cattle herd
skos:notation
RIV/00027162:_____/14:#0001111!RIV15-MZE-00027162
n3:aktivita
n11:P
n3:aktivity
P(ED0006/01/01), P(QH81065), P(QI101A094)
n3:cisloPeriodika
1
n3:dodaniDat
n12:2015
n3:domaciTvurceVysledku
n5:3036634 n5:9537007 n5:3608026 n5:1369369 n5:6982476
n3:druhVysledku
n13:J
n3:duvernostUdaju
n4:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
15550
n3:idVysledku
RIV/00027162:_____/14:#0001111
n3:jazykVysledku
n14:eng
n3:klicovaSlova
Cattle; Culture; Paratuberculosis; Passive shedding; qPCR
n3:klicoveSlovo
n9:qPCR n9:Passive%20shedding n9:Paratuberculosis n9:Culture n9:Cattle
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[82EA27FBF8EE]
n3:nazevZdroje
VETERINARY JOURNAL
n3:obor
n17:GJ
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
5
n3:projekt
n10:QH81065 n10:ED0006%2F01%2F01 n10:QI101A094
n3:rokUplatneniVysledku
n12:2014
n3:svazekPeriodika
201
n3:tvurceVysledku
Králík, Petr Kovařčík, Kamil Slaná, Iva Přibylová-Dziedzinská, Radka Králová, Alena
n3:wos
000338805600017
s:issn
1090-0233
s:numberOfPages
4
n16:doi
10.1016/j.tvjl.2014.02.011