INTRODUCTION
In the last 2 decades, mastitis prevention programs
(National Mastitis Council, 2009) have resulted in
better control of transmission of contagious mastitis
pathogens in lactating dairy cows. In many well-managed
dairy herds, the obtained decrease in prevalence
of IMI caused by contagious major pathogens is, however,
associated with a relatively higher proportion of
subclinical or mild clinical infections caused by CNS
(Tenhagen et al., 2006; Bradley et al., 2007; Piepers
et al., 2007). Moreover, CNS are the major cause of
IMI in heifers, the future milk producers of every dairy
herd (Fox, 2009; Piepers et al., 2010). The change in
distribution of mastitis pathogens suggests that current
mastitis control measures are less effective in reducing
CNS IMI.
INTRODUCTION
In the last 2 decades, mastitis prevention programs
(National Mastitis Council, 2009) have resulted in
better control of transmission of contagious mastitis
pathogens in lactating dairy cows. In many well-managed
dairy herds, the obtained decrease in prevalence
of IMI caused by contagious major pathogens is, however,
associated with a relatively higher proportion of
subclinical or mild clinical infections caused by CNS
(Tenhagen et al., 2006; Bradley et al., 2007; Piepers
et al., 2007). Moreover, CNS are the major cause of
IMI in heifers, the future milk producers of every dairy
herd (Fox, 2009; Piepers et al., 2010). The change in
distribution of mastitis pathogens suggests that current
mastitis control measures are less effective in reducing
CNS IMI.
การแปล กรุณารอสักครู่..

INTRODUCTION
In the last 2 decades, mastitis prevention programs
(National Mastitis Council, 2009) have resulted in
better control of transmission of contagious mastitis
pathogens in lactating dairy cows. In many well-managed
dairy herds, the obtained decrease in prevalence
of IMI caused by contagious major pathogens is, however,
associated with a relatively higher proportion of
subclinical or mild clinical infections caused by CNS
(Tenhagen et al., 2006; Bradley et al., 2007; Piepers
et al., 2007). Moreover, CNS are the major cause of
IMI in heifers, the future milk producers of every dairy
herd (Fox, 2009; Piepers et al., 2010). The change in
distribution of mastitis pathogens suggests that current
mastitis control measures are less effective in reducing
CNS IMI.
การแปล กรุณารอสักครู่..
