Milk somatic cell score (SCS) typically reaches a minimum early in lactation and then rises. Nonlinear mixed effects models were used to describe this trajectory while accounting for between and within-cow variation. A total of 2387 SCS records from 217 Holsteins were analyzed. Four nonlinear and two linear functions were studied. Approximate maximum likelihood estimates indicated that cows fre...

the main objective of the present study was to explore the feasibility of nonlinear mixed models to describe the somatic cell score (scs) lactation curves and to compare the fit of four nonlinear vs. two linear models when applied to scs lactation records in iranian holstein cows. the animal breeding center of iran provided the scc data. the data consisted of 445077 test-day observations from 6...

Aim: The aim was to compare standard lactation curve models using fortnightly milk records in Frieswal cattle. Materials and Methods: A total of 2904 fortnightly milk yield (FMY) records from 132 Frieswal cattle maintained at Military Farm, Bareilly, Uttar Pradesh were taken for study. The Wood (WD), Morant and Gnanasakthy (MG), Mitscherlich x Exponential (ME), and Wilmink (WK) models were fitt...

THE development of child psychiatry and the child guidance clinics form a most interesting study of enterprise and co-operation, jealousy and rivalry, and it has sometimes been sad to see belittled the work of the pioneers in the movement. Sixty years ago when Morant and Newman were laying down the bases of what was to be the school health service, they wrote of the need for psychological help ...