التلوث البكتيري لمقابض أبواب الفصول الدراسية ودورات المياه في بعض مدارس مدينة مصراتة ليبيا

Abstract EN

In this study, 180 samples were collected from classroom door handles and toilets, in 10 educational offices affiliated to the city of Misurata by 3 schools from each educational office randomly 10 strains of bacteria were isolated by direct isolation using four agricultural media, Nutrient agar blood agar, chocolate agar, and MacConkey agar, and it was evident through the results that gram-positive bacteria were dominant (46.1%), while Gramnegative bacteria did not exceed (10%), and the most common positive bacteria was Bacillus SPP.

(33.85%).

It is followed by Coagulase - negative Staphylococci (5.20%) and the least abundant Gram-positive bacterial genera is Coagulase positive Staphylococci by (3.125%), and one of the most common gram-negative bacteria is Enterobacter SPP.

(6.25%), followed by Klebsiella SPP.

(3.64%) followed by Proteus SPP.

and Acintobacter SPP.

and Serritia Spp.

and in equal proportions (1.56%), each while Neisseria SPP.

was the least present in Gram-negative bacteria.

Providencia SPP.

with a percentage (1.04%), the study also revealed a difference in the rates of bacterial contamination of door handles between schools, where the highest percentage of contamination of handles with gram positive and negative bacteria was recorded in boys' schools, and by (37.35%), for gram positive bacteria and (38.89%) For Gram-negative bacteria, followed by mixed schools with (36.14%), for Grampositive bacteria, and (33.33%), for Gram-negative bacteria, and that the lowest percentage of bacterial contamination of handles was in girls' schools with a percentage (26.51%), for Gram-positive bacteria and (27.78%) for Gramnegative bacteria, and The results of this study showed that the highest rate of contamination of door handles with positive bacteria was in the elementary and preparatory stages by (25%), while the highest rate of contamination of handles with negative bacteria was recorded in secondary school stages by (4.4%), The results of the study also showed that the highest percentage of pathogenic bacteria was in mixed schools, at a rate of (38.82%) followed by schools for boys (35.29%), and that the lowest percentage of pathogenic bacteria was in girls ’schools at a rate of (25.88%).