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OBJECTIVE To evaluate the effect of natural udder infection with minor pathogens on subsequent natural infection with major pathogens. SAMPLE POPULATION 7 dairy herds with low bulk milk somatic cell count. PROCEDURE During a 20-month prospective study, milk samples were collected from diary cows at regular intervals and from quarters with clinical signs(More)
Fertility indices, such as non-return rate and number of services per conception, have worsened significantly over the past few years. Because oestrus detection is one of the major factors influencing these indices, this study was performed to determine whether, how long, and at what time dairy cows show signs of oestrus in their behaviour. Two high(More)
Spermatogonial stem-cell survival in the ram was studied after single (6 Gy) and split-dose (2 x 3 Gy, interval 21-24 h) X-irradiation both under normal and hypoxic conditions. Hypoxia was induced by inflation of an occluder implanted around the testicular artery. The occluders were inflated about 10 min before irradiation and deflated immediately after.(More)
Results of a 20 month split-udder trial on the effect of discontinuation of postmilking teat disinfection on intramammary infections (IMI) with major and minor pathogens in seven dairy herds with a low somatic cell count are described. The incidence of Escherichia coli IMI was found to be significantly lower, whereas the incidence of IMI with Staphylococcus(More)
INTRODUCTION Postoperative ileus (POI) is characterized by a transient inhibition of coordinated motility of the gastrointestinal (GI) tract after abdominal surgery and leads to increased morbidity and prolonged hospitalization. Currently, intestinal manipulation of the intestine is widely used as a preclinical model of POI. The technique used to manipulate(More)
Postmilking teat disinfection is accepted as an important part of standard preventive measures against mastitis in dairy cattle. The efficacy of postmilking teat disinfection against infections with contagious pathogens such as Staphylococcus aureus and Streptococcus agalactiae is beyond doubt. However, the efficacy of teat disinfection against infections(More)
The effect of 100 IU human chorionic gonadotrophin (hCG) on testicular capillary blood flow was studied in adult male rats using a 133Xe clearance method and a radioactive microsphere technique. To investigate the role of Leydig cells in regulation of testicular blood flow after treatment with hCG, rats were pretreated with ethane dimethylsulphonate (EDS)(More)
This article reviews the influence of machine milking on udder health. The main risks are transmission and penetration of pathogens during milking. Pathogens can be transmitted via the hands, cloths, and liners. Irregular fluctuations in the vacuum can cause penetration of mastitis pathogens into or through the teat canal. Such fluctuations are caused by(More)
Expectations are that 25% of the Dutch population will be aged 65 years or older in 2050 whilst in 2008 this proportion was only 15%. As a consequence the annual absolute number of new cases of specific infectious diseases will increase. Elderly people often have less clear symptoms of infection, making it harder for clinicians to recognize the disease.(More)