الفهرس 
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Abstract
The most important vectors of human and animal infectious
diseases are the synanthropic flies. The problem becomes more
severe with the increase in the number of these filthy flies as they
cause a great damage for veterinary animals. Therefore, the present
study was performed to evaluate synanthropic flies as vectors for
pathogens (bacteria) at different animal barns to reflect the interaction
of flies with different animals and the level and difference of
prevalence of pathogens.
Environmental conditions
According to the data obtained from the central laboratory for
agriculture climate (CLAC) at the Agriculture Research Center,
Sohag, monthly variations in temperature and relative humidity
throughout the investigation period were recorded. The average
minimum temperatures ranged between 8.5 to 23°C, while the
average maximum temperatures ranged between 22 to 39.2°C. The
annual minimum relative humidity ranged between 12% (June) to
21.7% (March). Whereas, the maximum relative humidity rang