Abstract
This experiment investigated the association between SNP 5 UTR region of insulin –like growth factor-1 ( IGF-1 ) and phenotypic productive and physiological traits in cobb500 broiler breed .The study was conducted at poultry farm in Abu-Graib region during a period from 1Nov 2016-14Dec 2016 .Four hundred fifty broiler chicks one day old (cobb500) were wing –banded and divided to three treatment groups (three replicates each) according to gene polymorphisms .DNA was extracted from fresh blood samples .Restriction fragment length polymorphism was used in the 5 UTR region of IGF-1. Chicks were reared under conventional conditions according the guide and fed ad libitum at the end of experiment number of birds were killed to measure carcass cuts. Results showed a significant (P≤ 0.05) increase in live body weight of TT comparing with TC and CC in 1st week, whereas no significant differences was found between different polymorphisms in weight gain, blood traits and serum components in all weeks .on the other hand a significant (p≤ 0.05) increase was found in final body weight ,carcass weight and length of sternum and thigh bones for TT polymorphism in comparison with TC and CC.
Highlights
Calf diarrhea caused by bacterial infection has a bad effect on the dairy industry all over the world when calves are reared intensively, It involves significant economic loss for labor and capital, calf mortality, loss in calf value and veterinary costs [13,33]
The findings of the present study indicate that the clinical isolates of pathogenic bacteria resistance to a number of bacterial antibiotics
The present study showed that Three different infection and 10 (9.52%) samples were types of bacteria were isolated from a total of negative for bacteria
Summary
Calf diarrhea caused by bacterial infection has a bad effect on the dairy industry all over the world when calves are reared intensively, It involves significant economic loss for labor and capital, calf mortality, loss in calf value and veterinary costs [13,33]. Diarrhoea caused by different enteropathogens has been recognized as a major clinical problem for calves worldwide. Among these bacteria Eschirechia coli as “white scour”, Salmonella typhyimurium, Clostridium perfringens and Staphylococcus aureus are believed to be the major microbial causes of diarrhea in calves [1,10]. Antimicrobial agents are considered popular to fight diarrhea in calves. Their wide spectrum of activity, the emergence of microbial tolerance of different antimicrobial agents has become a well-known phenomenon, which represents a major concern [18]. Due to the truth that microorganisms developed resistance against several types of antimicrobial agents, communicable diseases persist to be one of the most important public health problems in different countries. The objectives of the current study were to isolate and identify various bacteria from feces of calves suffering from diarrhea in Baghdad, and evaluate its antimicrobial activity
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