Point prevalence of bovine fascioliasis and the influence of chemotherapy on the milk yield in a lactating bovine population from the district of Toba Tek Singh, Pakistan
Point prevalence of bovine fascioliasis and the influence of chemotherapy on the milk yield in a lactating bovine population from the district of Toba Tek Singh, Pakistan
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DOI：
10.1017/s0022149x10000659
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发表时间：
2011-09-01
影响因子：
1.6
通讯作者：
Hussain, A.
中科院分区：
文献类型：
--
作者：
Khan, M. K.;Sajid, M. S.;Hussain, A.
本文对巴基斯坦旁遮普省Toba Tek Singh地区的牛群的片形吸虫病点流行率及其化疗后产奶量增加的经济影响进行了估计。采用麦克马斯特产蛋计数技术对2400头牛和水牛进行了定量检测。随机选取受感染的牛和水牛各50头，每组25头分成两组。A组（水牛）和C组（牛）口服氧氯硝胺（16.6 mg kg（-1）体重）。B组和D组分别为水牛和牛的阴性对照。记录处理前后的产奶量，以确定处理后的产奶量是否有任何变化。2400份粪便标本中，片形吸虫阳性654份（27.25%），平均每克卵数（EPG）为503.2个。水牛的片形吸虫病点患病率（34.58%,415/1200，平均EPG最大似然值= 521.4）显著高于牛（19.92%,239/1200，平均EPG最大似然值= 415.8）（OR = 2.13, P < 0.05）。在寄生虫种类中，巨型F.（19.88%, 477/2400）占优势（OR = 3.12, P < 0.05），肝F.（7.38%, 177/2400）占优势。经氧氯氰胺处理的水牛和牛平均每天增加0.67升和0.87升牛奶，每头动物增加0.41%和0.37%的脂肪。据估计，减少受感染动物产量对牛和水牛的经济价值分别为每头动物每天0.33美元和0.32美元。
This paper provides an estimation of the point prevalence of fascioliasis and its economic impact in terms of increased milk yield after chemotherapy of a bovine population from the district of Toba Tek Singh, Punjab, Pakistan. A total of 2400 cattle and buffaloes were examined quantitatively using the McMaster egg-counting technique. Infected cattle and buffaloes (50 of each) were randomly selected and each divided into two groups of 25 animals. Groups A (buffaloes) and C (cattle) were treated with oxyclozanide (orally, 16.6 mg kg(-1) body weight). Groups B and D served as negative controls for buffaloes and cattle, respectively. Pre- and post-treatment milk yield was recorded to determine if there were any changes in milk yield after treatment. Of 2400 faecal samples analysed, 654 (27.25%) were positive for Fasciola spp. with a mean number of eggs per gram (EPG) of 503.2. The point prevalence and worm burden of fascioliasis was significantly higher (OR = 2.13; P < 0.05) in buffaloes (34.58%; 415/1200; mean EPG maximum likelihood = 521.4) as compared to that of cattle (19.92%; 239/1200; mean EPG maximum likelihood = 415.8). Among the parasite species, F. gigantica (19.88%; 477/2400) was predominant (OR = 3.12; P < 0.05) as compared to F. hepatica (7.38%; 177/2400). An average daily increase of 0.67 and 0.87 litres of milk, with 0.41% and 0.37% more fat per animal, was observed in oxyclozanide-treated buffaloes and cattle, respectively. The economic value of reduced production of infected animals was estimated as US$0.33 and 0.32 per animal per day for cattle and buffaloes, respectively.