[Risk assessment of in infant formula powder].

To assess the risk of foodborne diseases caused by in infant formula powder from retail to feeding and provide formulate suggestions for safe feeding of infants at home. This study used the special monitoring and risk monitoring data of infant formula powder in Heilongjiang Province and combined data at home and abroad. The @RISK software was used to evaluate the disease risk caused by in the process of infant formula powder from retail to feeding.

Analysis of antibiotic-induced drug resistance of enteritidis and its biofilm formation mechanism.

This research was to explore antibiotic-induced drug resistance of and its biofilm formation mechanism. Kirby-Bauer (K-B) disk method recommended by Clinical and Laboratory Standards Institute (CLSI) was used to test drug sensitivity of Salmonella enteritidis to 16 kinds of antibiotics including ß-lactams, aminoglycosides, quinolones, sulfonamides, chloramphenicols, and tetracyclines. Polymerase chain reaction (PCR) was performed to detect carrying of drug resistance genes of 29 kinds of antibiotics including ß-lactams, aminoglycosides, quinolones, sulfonamides, chloramphenicols, and tetracyclines of .

[Risk assessment of Salmonella in broiler chicken].

Objective: To assess the risk of foodborne disease caused by Salmonella in broiler chickens from retail to table, and to find effective preventive measures according to the risk assessment results.

Methods: Using dose-response model and Combase database, to evaluate the chicken-Salmonella poisoning risk through the crosscontamination in the kitchen with @ RISK by combining monitoring data of broiler chickens in Heilongjiang Province and related data.

Results: According to the results of the quantitative risk assessment, there was a high risk of chicken-Salmonella poisoning because of cross-contamination in the kitchen.

Staphylococcus aureus ST398 from slaughter pigs in northeast China.

To describe the prevalence and population structure of Staphylococcus aureus bacteria that colonize pigs at slaughterhouses in northeastern China, nose swabs were collected from pigs in two slaughterhouses in Harbin, Heilongjiang Province, China in 2009. S. aureus isolates were characterized by multilocus sequence typing (MLST), spa typing, SCCmec typing, antimicrobial susceptibility testing and pvl gene detection.