Occurrence of pseudomonads in ray cow's milk, and trials to control pseudomonads aeruginosa in butter and tallaga cheese

Pseudomonas bacteria were detected in 10.7% of the examined 150 raw cow's milk samples collected from different farms in Kafr EL-Sheikh Governorate. Identification of the isolated organisms revealed the presence of 3 species, namely P. fluorescence, P. aeruginosa and P. fragi, of which the former was the most frequent [7.3%]. Moreover, serogrouping of the 4 P. aeruginosa strains revealed that they are belonging to 3 serotypes. Several natural preservatives [essential oils and lactic acid cultures] were examined for control of P. aeruginosa in butter and Tallaga cheese. ABT achieved the results as a best natural preservative since it eliminated P. aeruginosa after 7 and 30 days in butter and Tallaga cheese respectively. The tested preservatives had no marked effect on chemical composition of the tested products

Studies on market hen eggs in Kafr El-Sheikh and El-Gharbia Governorates

A total of 135 egg samples were collected from Kafr El-Sheikh and El-Gharbia Governorates markets [80 and 55 samples, respectively] for determination of their quality. The obtained results showed higher mean T.C.C. and yeast count values in egg shell samples collected from Kafr El- Sheikh Governorate than those in EL-Gharbia Governorate, while, the mean mould count values were higher in EL-Gharbia Governorate. Moreover, the egg content samples collected from Kafr El-Sheikh Governorate showed lower mean T.C.C. and mould count values and higher mean yeast count values than those in EL-Gharbia Governorate. Serological typing of the 8 salmonella isolates, 4 from each Governorate, revealed the presence of two serotypes; with an incidence percentage ranging from 25% to 75%. Residues of inhibitory substance were detected in 5% and 9.1% of the examined egg samples collected from Kafr EL-Sheikh and EL-Gharbia Governorates, respectively. Total aflatoxin content residues were detected in 16 samples [9 and 7 from Kafr EL-Sheikh and EL-Gharbia Governorates, respectively]