一貫化飼養和分地式飼養條件下豬群第二型豬環狀病排毒模式之比較

Comparison of Porcine Circovirus Type 2 Shedding Patterns in Pigs Raised Using Farrow-to-finish and Two-site Production Models

邱明堂(Ming-Tang Chiou) ； 楊程堯(Cheng-Yao Yang) ； 葉麗君(Li-Jun Ye) ； 張聰洲(Tsung-Chou Chang) ； 林昭男(Chao-Nan Lin)

《臺灣獸醫學雜誌》 38卷4期 (2012/12) Pp. 270-275

https://doi.org/10.7009/TVJ.201212.0270

摘要

為了解分地式飼養法是否可以有效阻斷豬環狀病毒（orcine circovirus type 2; PCV2）水平感染，本試驗挑選一個遭受PCV2感染之豬場，選取60頭4週齡無PCV2 感染豬隻，於四週齡離乳後逢機分成4組。A組豬隻移至正壓動物舍飼養；B組豬隻移至另一清淨且鄰近無飼養豬隻之豬舍；C組豬隻移至原豬場內另一棟清潔消毒後之空豬舍；D組豬隻則留於原豬場內原保育豬舍內。各組豬隻於4-16週齡間，每週定期採集唾液、鼻黏液、糞便拭子及血液，進行PCV2檢測。結果顯示，A及B組豬隻於試驗期間採集之各式樣品均無檢出PCV2，豬隻亦無任何之臨床症狀及死亡。C及D組豬隻分別於8-11週齡間及8-13週齡間排毒，排毒比率分別為40%及42%，豬隻死亡率分別為0%及20%。上述結果顯示，不同飼養管理模式對豬群PCV2之排毒模式有明顯之差異，以分地式飼養模式可降低豬群之PCV2排毒期及死亡率。

關鍵字

第二型豬環狀病毒 ； 排毒模式 ； 分地式飼養 ； 一貫化飼養

並列摘要

To compare porcine circovirus type 2 (PCV2) shedding routes and duration in pigs raised using different production systems, sixty 4-week-old PCV2-negative weaning pigs from a PCV2-contaminated farrow-to-finish herd were randomly divided into four groups. Pigs in groups A and B were moved to and raised in a positive pressure animal room and a clean and empty herd, respectively. Group C pigs were housed in an isolated pen of the original herd. Group D pigs were kept in the same pen as other conventional pigs. Nasal, oropharyngeal, and faecal swabs and blood samples were collected weekly during aged 4-16 weeks to detect PCV2 nucleic acid. No PCV2 DNA existed in samples acquired from pigs in groups A and B during the sampling period. No clinical signs of fever or growth retardation existed and animal deaths were recorded. In group C pigs, PCV2 shedding was detected in 40% of test pigs aged 8-11 weeks, but without mortality. Group D pigs had PCV2 shedding of 42% when aged 8-13 weeks, with 20% mortality during the test period. These results indicate that using a two-site production model has advantage on the control of PCV2 shedding. Separating nursery pigs from the original PCV2 shedding pig population in farrow-to-finish herds should reduce horizontal transmission of PCV2.

並列關鍵字

porcine circovirus type 2 ； shedding pattern ； multiple-site production model ； farrow-to-finish production model