Dry Cow Therapy, Mastitis and Milk - Enhancement Nissim Silanikove , , Agricultural Research Agricultural Research Organization, Institute of Organization, Institute of Animal Science, Israel. Animal Science, Israel. http:// http:// publicationslist.org/ publicationslist.org/ silanikove silanikove Gabriel Leitner , The Veterinary , The Veterinary Institute, Israel Institute, Israel
Dry Cow Therapy, Mastitis and Milk - Enhancement. Nissim Silanikove , Agricultural Research Organization, Institute of Animal Science, Israel. http://publicationslist.org/silanikove. Gabriel Leitner , The Veterinary Institute, Israel. Conventional. Organic. U. K. 37.1. 34.7. - PowerPoint PPT Presentation
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SCC (×1000) frequencies after treatment with CNH in the
following lactation
Reminder : pretreatment average SCC was 2,210.2
100 25.9%
101 - 200 33.3%
201 - 400 25.9%
401 14.8%
Bacterial cure in cows treated with CNH
433Total
08Others
010 pyogenesA .
14E. coli
26All Streptococcus
15S. aureus
Detected microorganism after
treatment
Detected microorganism before
treatment
Cure rate of 88.87 %P > .05
Dry period and new infections
"For every 5 kg increase in milk yield at dry-off above 12.5 kg, the odds of a cow having an environmental intramammary infection at calving increased at least by 77%".
Rajala-Schultz et al.; J Dairy Sci 2005; 88; 577-9
The risk of new intramammary infections might be reduced if milk production decreased prior to dry off, the udder involuted rapidly, and the teat canal closed in a timely manner".
R.T. Dingwell et al. 2001; National Mastitis Council Annual Meeting Proceedings, pp. 69-79; NMC, Verona, Wisconsin
Dry period: Treatment procedures
Treat all glands with or without antibiotics
Evacuate the treated gland and infuse the drug into the cistern.
Experimental structure: animals (number and types), treatments, and periods
Period Time Animals Number
Treatment
1 Aug. 04 - Aug. 05 heifers 74 None
cows 111 Naf. DC
2 Sep. 05 - June 06 heifers 56 None
cows 98 Naf. DC + CNH
control cows 17 Naf. DC
3 July 06 - April 07 heifers 48 None
cows 89 Naf. DC
Bacterial status (infected, noninfected, chronic, clinic and cured) in period 2 (following Nafpenzal DC+ CNH at DCT) and period 3 (following Nafpenzal DC)
1 Uninfected quarter before drying off and uninfected at parturition. 2 New Infection, chronic – Infection was detected during parturition and in the first 100 days in the new lactation: The same udders were uninfected before drying off.3 New Infection, clinical – Infection was detected during the first month after parturition and remained for the first 100 days in the new lactation: The same udders were uninfected before drying off.4Cure – Bacteria detected in the month preceding dry off was not detected in the same udder during the first 100 days of lactation5 Not Cured – The reciprocal of cured: Bacteria detected in given udders in the month preceding dry off was also detected in the same udder during the first 100 days of the subsequent lactation.
1 2 34000
5000
6000
7000
8000
Milk
yie
ld d
uri
ng
firs
t 5 m
on
ths
of
lact
atio
n (
kg)
Period
+9.9% +6.3%
+2.0%/year
+2.0%/year
1 2 34000
5000
6000
7000
8000
Milk
yie
ld d
uri
ng
firs
t 5 m
on
ths
of
lact
atio
n (
kg)
Period
+9.9% +6.3%
+2.0%/year
+2.0%/year
0 50 100 150 200 250 30010
20
30
40
50
60
70 Lactation: First (14,773 L) Second (10,614 L) Third (after treatment)
Milk
yie
ld (
L)
Days in milk
Cow 2425
0 50 100 150 200 250 30010
20
30
40
50
60
70
Milk
yie
ld (
L)
Days in milk
Lactation: First (12,460 L) Second (10,639 L) Third (12,106 L) Forth (after treatment)
Cow 2331
Conclusions
CNH is effective as a dry period treatment: eradicates existing infections, prevents new infections and lowers SCC.
CNH gained high rate of bacterial cure, with secretion of milk with low SCC during the next lactation cycle.
CNH improve dramatically milk hygiene immediately, without the need to discard milk from the uninfected gland.
CNH is effective where no alternative treatments exist.
CNH increases milk yield similar to growth hormone .
CNH has the potential to shortens the length of the dry period without adversely affecting milk yield in the subsequent lactation .