Outcome of an artificial coccidial infection in poults under the influence of floor heating

被引:8
作者
Abd El-Wahab, A. [1 ,2 ]
Visscher, C. F. [1 ]
Wolken, S. [3 ]
Reperant, L. -M. [4 ]
Beineke, A. [5 ]
Beyerbach, M. [6 ]
Kamphues, J. [1 ]
机构
[1] Univ Vet Med Hannover, Inst Anim Nutr, D-30173 Hannover, Germany
[2] Mansoura Univ, Fac Vet Med, Dept Anim Nutr & Deficiency Dis, Mansoura 35516, Egypt
[3] Univ Vet Med Hannover, Inst Parasitol, D-30559 Foundation, Germany
[4] French Agcy Food Environm & Occupat Hlth & Safety, ANSES, F-22440 Ploufragan, France
[5] Univ Vet Med Hannover, Inst Pathol, D-30559 Foundation, Germany
[6] Univ Vet Med Hannover, Inst Biometry & Informat Proc, D-30559 Foundation, Germany
关键词
artificial coccidial infection; floor heating; litter quality; young turkey; FOOT-PAD DERMATITIS; ANTICOCCIDIAL DRUGS; MOISTURE CONTENTS; GROWING TURKEYS; LITTER MOISTURE; YOUNG TURKEYS; BROILERS; ENTERITIS; SEVERITY; CHICKENS;
D O I
10.3382/ps.2012-02614
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Coccidiosis is one of the most prevalent diseases in poultry. The objective of the current study was to determine the effects of floor heating when poults were artificially infected with Eimeria regarding the outcome of the infection and secondary effects on litter quality and health of the foot pad. Two trials were performed. In each trial, 4 groups of 2-wk-old turkeys were reared for a 4-wk period. All birds were fed ad libitum identical pelleted diets without any anticoccidial additive. The first 2 groups were housed on dry wood shavings, with and without floor heating; the other 2 groups were housed on wet wood shavings (35% moisture, achieved by adding water as required), with and without floor heating. Two birds only (primary seeder birds; the other 18 birds were nominated as secondary infected birds) in each of the 4 groups were experimentally infected orally with Eimeria adenoeides (similar to 50,000 oocysts/bird). The number of oocysts eliminated via excreta was determined repeatedly. On d 42, each bird not only was scored macroscopically for coccidial lesions in the cecum but also oocyst counts were determined in the cecal contents. Finally, the foot pads were assessed weekly for external scoring and on d 42 of life for histopathological scoring. Although the counts of oocysts in seeder birds were almost identical (d 6 postinoculation), oocyst counts in excreta of secondary birds were markedly reduced in both trials when the poults were not exposed to wet litter. Moreover, in both trials using floor heating with exposure to wet litter resulted in a higher oocyst count in the excreta of secondary infected birds (3.72/3.92 in trials 1 and 2) on d 24 postinoculation compared with the other groups. Using floor heating resulted in significantly decreased foot pad dermatitis scores compared with groups housed without floor heating. In conclusion, the differences in oocyst counts indicate that the process of sporulation is affected by both the moisture and the temperature of the litter.
引用
收藏
页码:629 / 637
页数:9
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