Investigation of the environmental presence of Salmonella spp. in finishing pigs at commercial swine farms in Kansas (USA).

Salmonellosis remains a major foodborne disease threat to public health worldwide. Swine are considered a reservoir for many Salmonella serotypes affecting humans; however, not all serotypes of concern in food animal products cause clinical signs of infection in swine. The objective of this study was to evaluate the presence and distribution of Salmonella spp. in finishing pigs at commercial farms across Kansas (USA). Five farms were selected and sampled when pigs weighed between 125 and 136 kg. Samples were collected and transported to the laboratory for processing following USDA-FSIS guidelines. Susceptibility and resistance profiles were also studied. Fifty-three percent (100/186) of samples were culture positive for Enterobacteriaceae, and 14% (14/100) were confirmed Salmonella positive by PCR with three of five farms having no PCR-positive samples. Salmonella serotype Braenderup was the most common serovar identified in environmental samples, while Salm. Infantis, Agona, and Montevideo were identified in fecal samples. Multidrug resistance patterns were only found in Farm 3, in fecal samples and in one floor sample. The observations reported in this study highlight areas of concern, such as locations prone to fecal contamination, to be considered when cleaning and sanitizing between groups of pigs to decrease presence of Salmonella spp. in farm environments.

Salmonella enterica 4,[5],12:i:-, an Emerging Threat for the Swine Feed and Pork Production Industry.

ABSTRACT: Salmonella continues to be a significant cause of foodborne illnesses in human medicine. The Centers for Disease Control and Prevention reported Salmonella as the second leading cause of foodborne illness in the United States and the leading cause of both hospitalizations and deaths. Salmonella enterica 4,[5],12:i:- (STM) is a monophasic variant of Salmonella Typhimurium, and it is an emerging threat to both human and animal health. STM was first identified in the 1980s from poultry products and has become increasingly prevalent in meat products including pork. STM has also been identified in swine farms as well as in feed manufacturing environments and feed itself. Similar pulse-field gel electrophoresis profiles have been observed between human clinical cases and the STM samples originating from swine feed. These related profiles suggest a link between ingestion of contaminated feed by swine and the source of foodborne illness in human. The objective of this article was to better understand the history of STM and the possible pathway from swine feed to table. Continued research is necessary to better understand how STM can enter both the feed supply chain and the pork production chain to avoid contamination of pork products destined for human consumption.

Inoculation of Weaned Pigs by Feed, Water, and Airborne Transmission of Salmonella enterica Serotype 4,[5],12:i:.

ABSTRACT: Salmonella enterica serotype 4,[5],12:i:- (STM) has become an increasing problem for food safety and has been often detected in swine products. Weanling pigs were exposed to STM-contaminated feed, water, or air to determine possible STM transmission routes. A control group of pigs was included. STM was monitored daily in feces and rectal and nasal swabs. STM colonization was most prevalent in tissues from tonsil, lower intestine, and mesenteric lymph nodes. No differences in lesion severity were observed between inoculated and control pigs. Contaminated feed, water, and aerosolized particles caused infection in weaned pigs; however, no STM colonization was observed in skeletal muscle destined for human consumption. Based on the results from this study, STM contamination in pork products most likely results from cross-contamination of meat by digesta or lymph node tissue during processing.

Integrating National Violent Death Reporting System Data into Maternal Mortality Review Committees.

Background: With the Maternal Mortality Review Information Application (MMRIA) data system, the Centers for Disease Control and Prevention (CDC), alongside Maternal Mortality Review Committees (MMRCs), are developing comprehensive and uniform data collection to eradicate preventable maternal deaths. However, MMRIA is primarily focused on pregnancy-related deaths, and not pregnancy-associated deaths. Currently, the National Violent Death Reporting System Restricted Access Data (NVDRS-RAD) on pregnancy-associated homicides and suicides are not included in MMRIA and by extension the work of most MMRCs. This study examined the NVDRS-RAD data from 2014 to 2017 and argues that the data for pregnancy-associated maternal deaths should be integrated into the work of MMRCs. Methods: A secondary data analysis of the NVDRS-RAD from 2014 to 2017 was conducted. Pregnancy-associated mortality was identified using data available within the NVDRS-RAD and categorized according to period of pregnancy and manner of death. Descriptive statistics and risk ratios were calculated. Chi-square tests were also calculated. Results: The results indicate that pregnancy and the postpartum period show increased risk for homicide and suicide. Pregnant women were found to be five times more likely to die by homicide than their nonpregnant peers who died by violent means. The relationships between periods of pregnancy and manner of death were all found to be significantly associated although the association was weak. Conclusions: Integrating National Violent Death Reporting System data on pregnancy-associated deaths into MMRIA would improve the efficacy of MMRCs and address the intertwined risk factors driving the racial disparities of the United States' maternal mortality rate.