which the butt reaction is never obscured by excessive H2S formation. The only nonsalmonellae which produce the characteristic salmonella reactions on dulcitol lactose iron agar are Ballerup-Bethesda paracolons which may be differentiated by the ninhydrin test.
Study Design: This is a prospective observational study. Objective: To determine the relationship of self-reported and clinical measures to the number of days to return to sport following acute lateral ankle sprains. Background: In order to direct rehabilitation, injury classification schemes should include self-reported and clinical measures that help prognosticate the number of days to return to sport (DAYS). Methods and Measures: Twenty Division II college athletes (7 men, 13 women; mean age = 19.2 ± 1.1 years) were assessed following an acute lateral ankle sprain and upon return to sport. Athletes were assessed by three self-reported measures: global function question, Short Form-36 Physical Function scale (SF36PF), visual analog pain scale, and four clinical measures: ankle active range of motion (AROM), ankle dorsiflexion strength, ankle plantar flexion strength, ambulation status. Simple regression, multiple regression, and effect sizes (ES) were used to analyze these data. Results: The simple regression revealed a statistically significant relationship between DAYS and the global function question (r 2 = .22), the SF36PF (r 2 = .28), and the patient's ambulation status (r 2 = .27). A multiple regression using these three variables in combination was also statistically significant (P = .015) and explained approximately one-third of the variance in DAYS, (r 2 = .37). All dependent variables revealed large or moderate ES. Conclusion: Self-reported functional measures in conjunction with the athlete's ambulation status are important factors in predicting the number of days to return to sport following acute lateral ankle sprains. Further research using large sample sizes and other clinical and functional measures is necessary.
Single and double gel-diffusion techniques were employed to examine serologically coagulase-positive staphylococci from cheese for enterotoxigenicity. Supernatant fluid from sac cultures was examined for enterotoxins A and B. The results indicated that 9 of 155 cultures from market cheese and 7 of 77 cultures from food-poisoning cheese produced enterotoxin A, and that none of the cultures produced detectable levels of enterotoxin B. Results of serological tests were confirmed by intravenous injection of cats.
A collaborative study was performed on a rapid Bacillus stearothermophilus agar diffusion ampule method to detect low levels of penicillin G in 7 types of fluid milk products. A multitest technique for processing a large number of samples simultaneously was also studied. Slight modifications were made in the original method to establish more uniformity and to eliminate doubtful responses by specifying a confirmation procedure. Twenty samples spiked with penicillin G (0.000 to 0.008 IU/mL) and tetracycline hydrochloride were frozen and sent to 20 laboratories in the ampule test, and 16 laboratories in the multitest. Each analyst was asked to do a screening run and a confirmation run. Results were reported by color reaction and also as positive or negative for β-lactam inhibitors. The concentrations (penicillin G) where percent positive results equal 100 or not significantly less than 100 (α = 0.05) ranged from 0.005 to 0.007 IU/mi in the ampule test and from 0.004 to 0.007 IU/mL in the multitest. Both techniques have been adopted official first action.
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