Microbiological evaluation of some dairy products sold by dairy shops and street vendors in rural areas

Ninety random samples of Kareish cheese, rice milk and yoghurt were collected as 15 samples of each from dairy shops and street vendors. The results obtained as a mean of total bacterial count, coliform, yeast and mould of dairy shops 3.9 x 104, 2 x 102 ,1.6 xl0[4] 4.4xl0[4], 3.5 xl0[2], 1.4 xl0[3], 1.5 x 10[2] i 4.5 x 10[3], 0.51 x 10[2], 1.5 x 10[3],1.2 x 10[3] and street vendors 6.3 x 10[4], 9.6 x 10[2], 4.4 x 10[4] 3.6 x 10[3] 8.7 x 10[4] 4.3 xl0[2], 2.2 x 10[3], 7.3 x 10[2]U.9 x 10[2], 2.3 xl0[2], 14 x 10[2], 4 x 10[2] respectively. The mean count of Staphylococcus aureus, for rice milk andyoghurt were 1.1 x 10[2], 6 x 10[2]; 3.4 x 10[2] and 10 x 10[2], respectively. The incidence of E. coli for the three products were 6.6%, 33.3%; 13.3%, 26.6%; 13.3% and 20.0%. Incidence of Staphylococcus areus enterotoxins both type A and D were 7.7% but C was 23.1%. The isolated moulds were Alternaria sp., Asp. Niger, Caldosporium sp., Asp. flavus and penicillium sp. Salmonella failed to be detected in all examined samples The public health importance as well as hygienic measures to improve the quality of the products were discussed

Pigeon, duck and chicken ileal loop response to E coli isolated from pigeons, turkeys, ducks, and chicken

A total of 257 E. Coli isolates were recovered from blood and/ or internal organs of 250 pigeons, 128 turkeys and 100 ducks with septicaemic manifestations. 137 E. Coli isolates could be serotyped. In pigeons, there were 86 E. Coli isolates belonging to the O-groups 1,2,11,22,22,29,48,53,99,101,110,116,119,123,126,147 and 156 in turkeys they were 31 E. coli isolates belonging to the O-groups 1,2,11,17,29,53,79,86,99 and 111 and in ducks they were 20 E. coli isolates belonging to the O-groups 11,17,22,71,86,99,11,119,137 and 157. It was succeeded to carry out the ileal loop test for determination of the enterotoxicity of E. coli in pigeons, ducks and chickens using E. coli isolates recovered. From these birds. Chickens were also found to be suitable for testing E. coli isolated from pigeons, turkeys and ducks. Distention of the ileal loops was achieved by 24.6% of the tested 65 isolates. On the other hand 69.2% of the isolates caused congestion and haemorrhages when their bacteria-free filtrates were injected in 10 days old chicken embryos. The oral administration of live bacterial suspensions of 10 E. coli O-groups caused diarrhoea of live bacterial suspensions of 10 E.coli O-groups caused diarrhoea in all chickens used in the experiment. The mortality rate varied between 0 and 80%

Indirect determination of uranium by atomic absorption spectrophotometry

An indirect method has been developed for the determination of uranium by atomic absorption spectrophotometry using an air-acetylene flame. Use is of the reduction of iron [III] by uranium [IV] followed by complex formation of the iron [II] ions so produced with 1, 10-phenanthroline and finally the determination of iron in this complex by atomic absorption spectrophotometry