{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T23:24:22Z","timestamp":1787268262923,"version":"build-2736575974"},"reference-count":19,"publisher":"Georg Thieme Verlag KG","issue":"04","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Tierarztl Prax Ausg G Grosstiere Nutztiere"],"published-print":{"date-parts":[[2026,8]]},"abstract":"<jats:title>Zusammenfassung<\/jats:title>\n                  <jats:p>Ziel dieser bayernweiten Querschnittsstudie war es, das Ausma\u00df der quantitativen bakteriellen Erregerausscheidung in Viertelgemelksproben laktierender Milchk\u00fche unter Praxisbedingungen zu beschreiben. Besonderes Augenmerk lag auf dem Zusammenhang zwischen Erregerausscheidung, Eutergesundheit und saisonalen Einfl\u00fcssen.<\/jats:p>\n                  <jats:p>Es wurden 305 zuf\u00e4llig ausgew\u00e4hlte Milchviehbetriebe aus allen bayerischen Regierungsbezirken im Jahresverlauf besucht. Insgesamt wurden 58\u2009108 Viertelgemelksproben von 14\u2009700 K\u00fchen entnommen und mikrobiologisch untersucht. Die Erregerausscheidung wurde semiquantitativ (1\u201310 KbE\/0,01ml bis&gt;200 KbE\/0,01ml) bestimmt und gemeinsam mit dem somatischen Zellgehalt auf Viertelebene analysiert. F\u00fcr die statistische Auswertung wurden die 5 Ausscheidungsklassen in 3 Kategorien verdichtet.<\/jats:p>\n                  <jats:p>Die H\u00f6he der bakteriellen Erregerausscheidung variierte deutlich in Abh\u00e4ngigkeit vom Gesundheitsstatus des Euterviertels. Gesunde Viertel zeigten signifikant h\u00e4ufiger niedrige oder mittlere Erregerausscheidung als subklinisch oder klinisch betroffene Viertel. F\u00fcr Staphylococcus aureus war die Wahrscheinlichkeit, eine niedrige Erregerausscheidung (1\u201310 KbE\/0,01 ml) zu zeigen, bei gesunden Vierteln mehr als zw\u00f6lfmal h\u00f6her als bei klinisch auff\u00e4lligen. Auch Streptococcus uberis und Streptococcus dysgalactiae wurden in gesunden Vierteln \u00fcberwiegend in mittleren Konzentrationen ausgeschieden. F\u00fcr Staphylococcus aureus zeigte sich zus\u00e4tzlich ein saisonaler Effekt, wobei im Sommer seltener eine geringe Erregerausscheidung als im Winter beobachtet wurde. F\u00fcr Escherichia coli und Streptococcus agalactiae konnten aufgrund nur weniger Nachweise keine belastbaren Aussagen getroffen werden.<\/jats:p>\n                  <jats:p>Die Studie zeigt, dass auch klinisch unauff\u00e4llige Tiere relevante Mengen pathogener Keime ausscheiden k\u00f6nnen. Eine ausschlie\u00dfliche Betrachtung der Zellzahl reicht zur Einsch\u00e4tzung der Eutergesundheit nicht aus.<\/jats:p>\n                  <jats:p>Gezielte mikrobiologische Herdenuntersuchungen sind eine sinnvolle Erg\u00e4nzung zur somatischen Zellzahl in der Milch als Eutergesundheitsparameter. Sie erm\u00f6glichen es, klinisch inapparente aber infizierte K\u00fche in der Herde zu erkennen und tragen durch Fr\u00fcherkennung zur Optimierung der Eutergesundheit bei.<\/jats:p>","DOI":"10.1055\/a-2894-2989","type":"journal-article","created":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T22:42:13Z","timestamp":1787265733000},"page":"234-243","source":"Crossref","is-referenced-by-count":0,"title":["Quantitative Erregerausscheidung bei intramamm\u00e4ren Infektionen \u2013 eine praxisnahe Studie bei bayerischen Milchk\u00fchen"],"prefix":"10.1055","volume":"54","author":[{"given":"Klara","family":"Kalverkamp","sequence":"additional","affiliation":[{"name":"Eutergesundheitsdienst und Milchhygiene, Tiergesundheitsdienst Bayern e.V., Poing"},{"name":"Klinik f\u00fcr Wiederk\u00e4uer mit Ambulanz und Bestandsbetreuung, Zentrum f\u00fcr klinische Tiermedizin, Ludwig-Maximilians-Universit\u00e4t M\u00fcnchen, Oberschlei\u00dfheim"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wolfram","family":"Petzl","sequence":"additional","affiliation":[{"name":"Klinik f\u00fcr Wiederk\u00e4uer mit Ambulanz und Bestandsbetreuung, Zentrum f\u00fcr klinische Tiermedizin, Ludwig-Maximilians-Universit\u00e4t M\u00fcnchen, Oberschlei\u00dfheim"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ulrike","family":"Sorge","sequence":"additional","affiliation":[{"name":"Eutergesundheitsdienst und Milchhygiene, Tiergesundheitsdienst Bayern e.V., Poing"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"194","published-online":{"date-parts":[[2026,8,20]]},"reference":[{"key":"ref2","doi-asserted-by":"publisher","first-page":"475","DOI":"10.1051\/vetres:2003027","article-title":"Production effects related to mastitis and mastitis economics in dairy cattle herds","volume":"34","author":"H Seegers","year":"2003","journal-title":"Vet 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