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Research Article
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Use of Serratia marcescens for Feed Processing:
Broiler Performance and Pathogenicity Assay |
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Maria Endo Mahata,
Ichni Lestari,
Abdi Dharma,
Irsan Ryanto H.,
Armenia
and
Yose Rizal
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ABSTRACT
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Serratia marcescens is a bacterium able to produce
chitinase for degrading chitin. Broiler chickens can not digest significant
amounts of chitin because they produce very little chitinase in their digestive
tract. Therefore, broiler feed containing chitin must be processed first with
chitinase. Serratia marcescens is an opportunistic pathogenic bacterium
and a pathogenicity test is required before using its chitinase for processing
of feed containing chitin. An experiment was conducted by using broiler. A split-plot,
completely randomized design is used in this experiment. The Serratia marcescens
dosages (0, 40, 80, 160 and 320 mg/kg body weight) were the main plot and observation
lengths (2, 4, 8, 16 and 22 days) were the sub plot factor. The ration for different
treatments had the same protein (23%) and energy (3000 kkal/kg) content. Feed
consumption, average daily gain, body temperature and mortality were parameters.
Results showed that feed consumption and average daily gain were significantly
affected (p<0.05) by presence of Serratia marcescens. The highest
feed consumption (123.10 g/broiler) and average daily gain (76.75 g/broiler/day)
were found for the highest bacterium dosage of 320 mg/kg body over 22 days observation.
Body temperature range from 39.82-40.08°C and there was no affect of Serratia
marcescens on mortality. In conclusion, the Serratia marcescens had
no negative effect on broiler performance.
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