in Saanen & Alpine goats

EFFECT OF WEEPING UDDER ON THE LEVEL OF SOMATIC CELL COUNTS AND PRODUCTION TRAITS IN ALPINE AND SAANEN DAIRY GOATS S. BIFFANI*, G. MINOZZI, R. PICCININI, B. CASTIGLIONI, S. GRANDE, P. FRESI, P. CREMONESI, G. PAGNACCO, G. GANDINI & A. STELLA IBBA-CNR, UNIMI, AssoNaPa NMC Milano2018 - the 2018 International Bovine Mastitis Conference

WEEPING UDDER ?

Goat Udder Anatomy (Normal) NMC Milano2018 - the 2018 International Bovine Mastitis Conference

WEEPING UDDER – LIMITED INFOS

France ? YES, no data about Incidence… NMC Milano2018 - the 2018 International Bovine Mastitis Conference

GOATS & WEEPING UDDER IN ITALY

• SAANEN & ALPINE (Northern Italy) • 2017: Breed Herds Milking Goats Saanen 229 13749 Alpine 242 11128 NMC Milano2018 - the 2018 International Bovine Mastitis Conference

AI 10%

GOATS & WEEPING UDDER IN ITALY

• Type Traits Evaluation:

• aprox 10k goats from 750 herds • defect detected NMC Milano2018 - the 2018 International Bovine Mastitis Conference

GOATS & WEEPING UDDER IN ITALY

herds with at least 1 affected goat:

• SAANEN : 1 out of 9 (13.8%)

• ALPINE : 1 out of 5 (21.6%) NMC Milano2018 - the 2018 International Bovine Mastitis Conference

GOATS & WEEPING UDDER IN ITALY

• Average Incidence

•SAANEN: 3.6 % •ALPINE: 7.5 % NMC Milano2018 - the 2018 International Bovine Mastitis Conference

WEEPING UDDER IN ITALY • On-going project • CNR + UNIMI + AssoNaPa • Genetic aspects (h2 + GWAS) • Relationship between Udder health & Weeping Teats • Relationship between goat milk microbiota & Weeping Teats NMC Milano2018 - the 2018 International Bovine Mastitis Conference

CURRENT WORK OBJECTIVE

to investigate the effect of «weeping teats» on udder health (SCS) and milk production (kg/d) in Saanen & Alpine goats NMC Milano2018 - the 2018 International Bovine Mastitis Conference

DATA 2978

herds Test-days Birth Years Parity

1774

• 86 • 92.502 (milk + SCC) • 2006 • 2016 • Primiparous • Pluriparous

NMC Milano2018 - the 2018 International Bovine Mastitis Conference

MODEL • Very simple Repeatibility Mixed Model by breed & parity

1

Fixed

n

Random

Test-day Herd DIM (10 classes) Year-Season of calving Weeping Teats (Y/N)

Goat

NMC Milano2018 - the 2018 International Bovine Mastitis Conference

MODEL • Very simple Repeatibility Mixed Model by breed & parity

1

Fixed

n

Random

Test-day Herd DIM (10 classes) Year-Season of calving Weeping Teats (Y/N)

Goat

NMC Milano2018 - the 2018 International Bovine Mastitis Conference

RESULTS - INCIDENCE

Primiparous Pluriparous Saanen 3.5 3.9 Alpine 7.5 7.4 NMC Milano2018 - the 2018 International Bovine Mastitis Conference

RESULTS – EFFECT ON MILK

Daily milk loss (kg/day) -0.107 -0.167

Daily milk loss (kg/day) n.s. -0.046

NMC Milano2018 - the 2018 International Bovine Mastitis Conference

RESULTS – EFFECT ON SCS

Daily SCS increase n.s. +0.28

Daily SCS increase +0.26 +0.21

NMC Milano2018 - the 2018 International Bovine Mastitis Conference

CONCLUSIONS

• No data from Literature • No info from Udder Phisiology • Effects on Milk & SCS • Alpine more susceptible (SCS) • in progress • h2 • GWAS NMC Milano2018 - the 2018 International Bovine Mastitis Conference