(2 + f(n)) [599]. 1 [642, 1201, 524]. 2 [526, 1036, 1273, 1251, 1236, 81]. 2 [612]. 3 [493, 872, 1761, 1036, 842, 1039, 639]. 5 [1422]. (2,128) [522]. ∗ [409]. 2 [314]. ] [117]. st [1039]. TM [1337]. PASS [785]. Z [738]. β [290]. δ [91]. ` [1181]. Fq [526]. k [1487, 1181, 440, 1235, 917, 426, 640, 648, 916, 624, 501, 846]. λ [290]. m [540]. q [94]. K [765]. μ [797]. n [540, 652]. n− 3 [652]. O(...

The 81-bp region of the rpoB gene in 66 Rif(r) Mycobacterium tuberculosis isolates from China, Japan, Korea, and Taiwan was analyzed. Twelve single-nucleotide substitutions in the rpoB gene were detected. The most prevalent mutations were at Ser-531 (52%), Asp-516 (17%), and His-526 (11%). Mutations were not found in seven (11%) of the isolates. Higher mutation rates in 50 Beijing family isolat...

Science, a weekly journal, is published each Friday by the American Association for the Advancement of Science at Mt. Royal & Guilford Avenues, Baltimore 2, Maryland. Founded in 1880, it has been since 1900 the official publication of the AAAS. Editorial, Advertising, and Circulation Offices, 1515 Massachusetts Avenue, N.W., Washington 5, D. C. Telephone, EXecutive 6060 or 6061. Articles offere...

this study was conducted to detect the presence ofseja gene among salmonella enteritidis isolates from poultry sources by polymerase chain reaction (pf'r) and evaluate its potential as diagnostic and epidemiological tools. thirty salmonella isolates from poultry sources: broilers. broiler breeders, layers, hatcheries, and poultry abattoirs were investigated. upper and forward primers were ...