cowpox什么意思

假牛痘 Pseudo-Cowpox (Milkers’ Nodule)
Prepared by: Dr. Terry Hunt
Translated by Dr. Fu Xiaoping
病因/发病机理 Cause & Pathogenesis
• 副泡状病毒 Parapox virus
• 乳区、乳头的轻度感染 Mild infection of udder & teats
• 牛群传播慢 Slowly spreads throughout herd
• 发生于下一胎次 Will reoccur in subsequent lactations
• 通过设备、手、清洗液、昆虫传播
Spread from infected cows by equipment, hands, washing & insects
公众卫生：造成挤奶员手或指上红色/紫色发痒的结节
Public Health: Causes mild itchy purple/red nodules on hands and fingers of milker

危险因素 Risk Factors
• 仅仅新产牛最易感 Just freshened cows are most susceptible
临床症状 Clinical Findings
• 乳头/乳房上红小色丘疹，逐渐发展为水疱，最后结痂
Small red papules on teats and udder progressing to vesicles then scabs
• 马蹄形或圆环形痂 Horseshoe or circular ring of scabs
• 一般3周内治愈，但可持续数月Usually heal in 3 weeks but may persist for months
诊断 Diagnosis
• 特征性马蹄形