in Saanen & Alpine goats

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EFFECT OF WEEPING UDDER ON THE. LEVEL OF SOMATIC CELL COUNTS AND. PRODUCTION TRAITS IN ALPINE AND. SAANEN DAIRY 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