Quinupristin-dalfopristin-resistant Enterococcus faecium on chicken and in human stool specimens.

Background: The combination of the streptogramins quinupristin and dalfopristin was approved in the United States in late 1999 for the treatment of vancomycin-resistant Enterococcus faecium infections. Since 1974, another streptogramin, virginiamycin, has been used at subtherapeutic concentrations to promote the growth of farm animals, including chickens.

Methods: To determine the frequency of quinupristin-dalfopristin-resistant E.

A large community outbreak of salmonellosis caused by intentional contamination of restaurant salad bars.

Context: This large outbreak of foodborne disease highlights the challenge of investigating outbreaks caused by intentional contamination and demonstrates the vulnerability of self-service foods to intentional contamination.

Objective: To investigate a large community outbreak of Salmonella Typhimurium infections.

Design: Epidemiologic investigation of patients with Salmonella gastroenteritis and possible exposures in The Dalles, Oregon.

Endogenous antibody production to botulinum toxin in an adult with intestinal colonization botulism and underlying Crohn's disease.

A patient with obstruction of the terminal ileum from Crohn's disease developed complete paralysis in week 1 of hospitalization. Features initially suggested Guillain-Barre syndrome, but botulinum toxin was identified in serum and stool specimens from week 1 and type A toxin-producing Clostridium botulinum in stool specimens from weeks 3 to 19, confirming botulism due to intestinal colonization. In week 19, the inflamed small bowel was resected, and C.

Public health implications of the microbial pesticide Bacillus thuringiensis: an epidemiological study, Oregon, 1985-86.

Bacillus thuringiensis var. kurstaki (B.t.

Cryptosporidium infection in Oregon public health clinic patients 1985-88: the value of statewide laboratory surveillance.

To evaluate the utility of statewide laboratory Cryptosporidium surveillance, we screened stools from all 5,256 patients evaluated at local health departments for parasitic disease from January 1985 through June 1988. Fifty-seven patients (1.1 percent) were found to have Cryptosporidium.