The Effects of Early Antibiotic Treatment Following Diagnosis of Mastitis Detected by a Change in the Electrical Conductivity of Milk

Mastitis was induced experimentally by infusion of Streptococcus uberis or Staphylococcus aureus into the mammary glands of lactating dairy cows. Clinical mastitis was identified when clots appeared in foremilk (conventional diagnosis) or was predicted by changes in the electrical conductivity of fo...

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Bibliographic Details
Published in:Journal of dairy science 1997-05, Vol.80 (5), p.859-863
Main Authors: Milner, P., Page, K.L., Hillerton, J.E.
Format: Article
Language:English
Subjects:
Animal productions
Animals
Anti-Bacterial Agents - therapeutic use
ANTIBIOTICOS
ANTIBIOTIQUE
Biological and medical sciences
Cattle
Cell Count
CONDUCTIVIDAD ELECTRICA
CONDUCTIVITE ELECTRIQUE
CONTEO DE CELULAS SOMATICAS
DIAGNOSTIC
DIAGNOSTICO
Electric Conductivity
EXPERIMENTACION IN VIVO
EXPERIMENTATION IN VIVO
Female
Fundamental and applied biological sciences. Psychology
GLANDE MAMMAIRE
GLANDULAS MAMARIAS
INFECCION EXPERIMENTAL
INFECTION EXPERIMENTALE
INJECTION
intramammary treatment
INYECCION
Lactation
LAIT
LECHE
MAMMITE BOVINE
MASTITIS BOVINA
Mastitis, Bovine - diagnosis
Mastitis, Bovine - drug therapy
Mastitis, Bovine - physiopathology
Milk - cytology
Milk - physiology
NUMERATION CELLULAIRE SOMATIQUE
RENDEMENT LAITIER
RENDIMIENTO LECHERO
somatic cell count
Staphylococcal Infections - drug therapy
STAPHYLOCOCCUS AUREUS
Streptococcal Infections - drug therapy
STREPTOCOCCUS UBERIS
TERAPEUTICA MEDICAMENTOSA
Terrestrial animal productions
THERAPEUTIQUE MEDICAMENTEUSE
VACAS LECHERAS
VACHE LAITIERE
Vertebrates
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Summary:Mastitis was induced experimentally by infusion of Streptococcus uberis or Staphylococcus aureus into the mammary glands of lactating dairy cows. Clinical mastitis was identified when clots appeared in foremilk (conventional diagnosis) or was predicted by changes in the electrical conductivity of foremilk (early diagnosis). The responses to intramammary antibiotic treatment that was initiated after early diagnosis of mastitis and after conventional diagnosis were compared. Early treatment significantly limited the severity of the disease and, in many cases, prevented the appearance of any visible signs of infection. Milk yield was less depressed, and the somatic cell count (SCC) was lower, when treatment was initiated earlier. The SCC of the quarter at the time mastitis was predicted was approximately 2 × 106 cells/ml for both pathogens, which was significantly less than when clots appeared at conventional diagnosis, approximately 4 × 106 and 12 × 106 cells/ml for Staph. aureus and Strep. uberis, respectively. The time required for SCC to recover to
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.s0022-0302(97)76008-9