Prepared by: Dr. Terry Hunt
Translated by Dr. Ren Xiaoling
病因/發(fā)病機(jī)理
Cause & Pathogenesis
Cause of acute highly contagious mastitis in dairy cows
- 快速傳播至牛的各個(gè)住處(?)和關(guān)節(jié)(全身階段)
Rapidly spreads to all quarters and joints of cows (Systemic phase)
- 將會(huì)從感染的牛奶傳染給牛犢引起肺炎和關(guān)節(jié)炎
Will spread to calves from infected milk causing pneumonia and arthritis
危險(xiǎn)因素
Risk FactorsIntroduction of carrier cows into herd
Use of common mastitis syringe tube
- 臨床癥狀
Clinical Findings - 可能爆炸性爆發(fā)
May be explosive outbreaks
- 引起嚴(yán)重乳房炎—牛奶呈黃褐色至棕色水樣,有可以浮動(dòng)的沙樣絮片
Causes severe mastitis – milk watery tan-brown with sandy flakes that float
- 仍有食欲 Cows continue to eat
- 治療無效 No response to treatment
- 用標(biāo)準(zhǔn)的方法培養(yǎng)牛奶陰性Negative milk cultures using standard methods
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診斷
Diagnosis- 牛群爆發(fā)涉及多數(shù)地方 Herd outbreak involving multiple quarters
- 治療無效 No response to treatment
- 可涉及關(guān)節(jié) May involve joints
- 特殊的牛奶培養(yǎng)技術(shù) Special milk culture techniques
鑒別診斷
Differential Diagnosis
- 其他原因引起的乳房炎 Other causes of mastitis
實(shí)驗(yàn)室和病理學(xué)診斷Laboratory and Pathology
Requires special techniques to culture Mycoplasma
治療
Treatment- 對(duì)治療無效 Do not respond to treatment
預(yù)后情況
Prognosis- 牛只通常不死,但被淘汰 Cows do not usually die but are culled
后遺癥 Sequelae
- 無反應(yīng)性的乳房炎 Non-responsive mastitis
- 關(guān)節(jié)炎、跛行 Arthritis & lameness
預(yù)防
Prevention & Control
- 對(duì)所有牛只做系列培養(yǎng),陽性淘汰
Serial culture all cows and cull
- 治療乳房炎時(shí),單獨(dú)應(yīng)用注射器
Use individual tubes for treating mastitis
Do not feed infected milk to calves
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