盲目用藥表現有以下幾種：一(yi)是(shi)在(zai)尚(shang)不(bu)清(qing)楚(chu)病(bing)原(yuan)體(ti)和(he)病(bing)因(yin)的(de)情(qing)況(kuang)下(xia)
，盲(mang)目(mu)使(shi)用(yong)抗(kang)菌(jun)藥(yao)物(wu)。二(er)是(shi)因(yin)誤(wu)診(zhen)造(zao)成(cheng)用(yong)藥(yao)失(shi)誤(wu)，如(ru)將(jiang)非(fei)典(dian)型(xing)新(xin)城(cheng)疫(yi)誤(wu)診(zhen)為(wei)慢(man)性(xing)呼(hu)吸(xi)道(dao)病(bing)，用(yong)北(bei)裏(li)黴(mei)素(su)治(zhi)療(liao)；又you如ru把ba雞ji壞huai死si性xing腸chang炎yan誤wu診zhen為wei球qiu蟲chong病bing
，用yong複fu方fang磺huang胺an藥yao治zhi療liao。三san是shi雖sui已yi確que診zhen病bing原yuan體ti
，但dan所suo用yong藥yao物wu與yu病bing因yin不bu對dui應ying，如ru北bei裏li黴mei素su等deng僅jin對dui黴mei形xing體ti及ji革ge蘭lan氏shi陽yang性xing菌jun有you較jiao強qiang作zuo用yong，卻que被bei用yong來lai治zhi療liao禽qin霍huo亂luan及ji由you大da腸chang杆gan菌jun引yin起qi的de疾ji病bing。上shang述shu情qing況kuang，均jun不bu能neng取qu得de明ming顯xian的de療liao效xiao。

用量不當 zaijibingfangzhizhong，bushaosiyanghugeijihunsihuohunyindeyaowuyongliangyuanyuanchaoguoguidingyongliang，dajiliangyongyaoyoushisuikejiaoxingdadaoxunsukongzhibingqinghuoyouxiaozhiliaodemude
，danhuizaochenggaoxiaodiduyaowudelangfei，yehuiyinshiyongduxingjiaodadeyaowueryinqizhongdu。zaijiyuehuayangjiyezhong

，zhiliaoganranxingjibingshitongchangyigeliaochengwei3~5天，治療某些疾病如傳染性鼻炎、慢性呼吸道病、念珠菌病及住白細胞原蟲病時用藥時間可適當延長。若用藥1~2天
，看到症狀緩解就停藥

，很容易使病原體產生耐藥性，使今後的藥物治療更加困難
，也會使雞群隱性感染
、亞臨床或非典型發病。

用法不當 yishigeiyaotujingbudang，rubaburongyushuiqieduxingjiaodadeyaowudenghunyingeiyao，shibufenjisheyaoliangguodaerzhongdu

，lingyibufenjisheyaoliangbuzuerdabudaoyingyoudeliaoxiao
；youruxinmeisujizhushiduxingjiaoda，jinkeneifuhuojinghuxidaoxiru，quebeibushaoyangjihuyongyujizhuerzhijizhongduhuosiwang。ershiyongneifubuyibeixishoudeyaowuzhiliaochangdaoyiwaideganran。sanshijiangzaishuirongyezhongbuwending
、易分解的藥物混飲給藥，致使用藥無效。

長期用藥 許(xu)多(duo)養(yang)雞(ji)戶(hu)認(ren)為(wei)細(xi)菌(jun)性(xing)疾(ji)病(bing)可(ke)用(yong)抗(kang)菌(jun)藥(yao)來(lai)控(kong)製(zhi)。隻(zhi)要(yao)給(gei)禽(qin)群(qun)投(tou)入(ru)抗(kang)菌(jun)藥(yao)
，便(bian)可(ke)高(gao)枕(zhen)無(wu)憂(you)，如(ru)果(guo)幾(ji)天(tian)不(bu)用(yong)藥(yao)
，心(xin)裏(li)就(jiu)不(bu)踏(ta)實(shi)。一(yi)些(xie)養(yang)雞(ji)戶(hu)從(cong)進(jin)雛(chu)雞(ji)到(dao)雞(ji)出(chu)欄(lan)

，一(yi)直(zhi)不(bu)間(jian)斷(duan)地(di)變(bian)換(huan)著(zhe)使(shi)用(yong)各(ge)種(zhong)抗(kang)菌(jun)藥(yao)物(wu)。這(zhe)種(zhong)做(zuo)法(fa)既(ji)增(zeng)加(jia)了(le)養(yang)雞(ji)成(cheng)本(ben)，還(hai)易(yi)使(shi)細(xi)菌(jun)產(chan)生(sheng)耐(nai)藥(yao)性(xing)，加(jia)大(da)了(le)疾(ji)病(bing)治(zhi)療(liao)的(de)難(nan)度(du)。長(chang)期(qi)用(yong)藥(yao)還(hai)會(hui)破(po)壞(huai)腸(chang)道(dao)正(zheng)常(chang)的(de)平(ping)衡(heng)，引(yin)起(qi)真(zhen)菌(jun)性(xing)消(xiao)化(hua)道(dao)疾(ji)病(bing)。用(yong)藥(yao)過(guo)多(duo)還(hai)會(hui)給(gei)禽(qin)產(chan)品(pin)造(zao)成(cheng)嚴(yan)重(zhong)的(de)藥(yao)物(wu)殘(can)留(liu)，既(ji)危(wei)害(hai)人(ren)們(men)的(de)身(shen)體(ti)健(jian)康(kang)，又(you)造(zao)成(cheng)環(huan)境(jing)汙(wu)染(ran)。