Mastitis Treatment Protocol Treatment - II

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Mastitis Treatment Protocol Treatment - II
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Mastitis Management Plan
Contagious mastitis Primary source the gland of
other cows Major loss nonclinical - production
Environmental mastitis Primary source the
environment - soil, feces, bedding Major loss
clinical mastitis - disturbed function
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Strep ag MastitisStreptococcus agalactiae
Contagious mastitis

• Lives only in infected quarters
• Spread from cow to cow(milking, hands, common
  cloth)
• Subclinical
• High SCC and Reduced production
• Treatment
• Lactation 60 - 95 (75)
• Dry off 80 - 98

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Strep ag SusceptibleLaboratory Testing
Active Isolates Susceptible Tested
() Amoxicillin 114/116
98.3 Pen/Novobiocin 106/108
98.1 Cephaprin 119/123 96.7 Novobiocin
80/87 92.0 Pirlimycin 108/123
87.8 Erythromycin 107/123
87.0 Hetacillin 104/123 84.6 Penicillin 94
/123 80.5
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Strep ag Mastitis
Herd A Herd B 485 cows (Strep
ag-free) 450 cows purchase 110 cows purchase
450 cows SCC 350,000 to 670,000 (2mo) 120,000
to 180,000 cultured 49 cow Strep ag Screened
all cows Eradicated Strep ag in 8 months No
Strep ag added Finanical Loss
A B Laboratory cost
6,626 1,465 Loss milk (cow tx) 5,265
0 Culling (cows) 16,800 4,900 Drug
cost ( Rx) 2,100 0 Premium loss
(.25/cwt ) 13,500
0 Total 44,291 6,365 Total/cow
91.32 10.61
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Staph MastitisStaphylococcus aureus
Contagious mastitis

• Lives in infected quarters infected skin
• injured teat ends (mechanical, chemical, weather)
• Spread from cow to cow(milking, hands, common
  cloth)
• Nonclinical with high SCC reduce production
• Clinical (mild to severe) with repeated flare-ups
• Treatment
• Lactation 10 - 60
• Dry off 40 - 70
• less 10 with chronic, long standing infections

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Treatment of S.aureus IMIAntibiotics
Field Studies Product Glands
Cures Clox/florfenicol 33 1
3, Wilson 1996 Amoxicillin 12 1
8, Sears 1994 Pirlimycin 68
12 18, Sears 1998 Total 104 14 13
Staphylococcus aureus isolation Sampling
Culture positive 1
75 2
94 3 98
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Staphylococci MastitisStaph intermedius, Staph
hyicus, Staph chromogenes
Control Postmilking teat dip Eliminate with
dry cow therapy Treatment Dry cow therapy -
90 Lactation - 28 (Wilson, 1993)
control
Dry cow therapy
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Mastitis in HeifersCoagulase-Negative
Staphylococci

• All lactating cows highest prevalence of CNS
  during lactation occurs at calving
• CNS are part of normal skin flora
• Many infections are transient
• Estimates of infection prevalence for heifers at
  calving 2-20 of quarters

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ColiformsE. coliKlebsiellae sp
Environmental Mastitis

• Etiology fecal organisms
• poor hygiene (not cow to cow)
• higher incidence in hot summer (July-Aug)
• bedding (Klebsiella with wood products
• Clinical mastitis
• Acute/toxic (15 will be severe life
  threatening)
• rarely chronic (Klebsiella more common)

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ColiformsE. coliKlebsiellae sp

• Treatment supportive
• fluids (IV oral)
• NASID
• antibiotic therapy of little value
• Control Prevention
• Clean dry bedding
• inorganic - sand
• maintained and monitored
• J-5 vaccination in dry period (3x)

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Streptococcus MastitisStr. uberis, enterococci,
Str. dysgalactiae
Environmental Mastitis

• Etiology fecal organisms, rumen, genitalia
• poor hygiene (not cow to cow)
• higher incidence late dry period
• any time during lactation
• Clinical mastitis
• mild (lt15 will be clinical )
• usually short duration, can become chronic ( 45
  days)
• Treatment
• Lactation 15-85 (78 , Wilson, 1993)
• Dry off gt75

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Antimicrobials and mild mastitis

• No antimicrobial use increased SCC, prevalence of
  Strep uberis

Cattell, 1996
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Develop Treatment Plan
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Write-out Treatment Plan
Records Treatments
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Keep Individual Cow Treatment Records
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