Category Archives: Uncategorized

Research – Microbial Diversity in Bushmeat Samples Recovered from the Serengeti Ecosystem in Tanzania

Nature.com

Bushmeat, the meat and organs derived from wildlife species, is a common source of animal protein in the diets of those living in sub-Saharan Africa and is frequently associated with zoonotic spillover of dangerous pathogens. Given the frequent consumption of bushmeat in this region and the lack of knowledge about the microbial communities associated with this meat, the microbiome of 56 fresh and processed bushmeat samples ascertained from three districts in the Western Serengeti ecosystem in Tanzania was characterized using 16S rRNA metagenomic sequencing. The results show that the most abundant phyla present in bushmeat samples include Firmicutes (67.8%), Proteobacteria (18.4%), Cyanobacteria (8.9%), and Bacteroidetes (3.1%). Regardless of wildlife species, sample condition, season, or region, the microbiome is diverse across all samples, with no significant difference in alpha or beta diversity. The findings also suggest the presence of DNA signatures of potentially dangerous zoonotic pathogens, including those from the genus Bacillus, Brucella, Coxiella, and others, in bushmeat. Together, this investigation provides a better understanding of the microbiome associated with this major food source in samples collected from the Western Serengeti in Tanzania and highlights a need for future investigations on the potential health risks associated with the harvesting, trade, and consumption of bushmeat in Sub-Saharan Africa.

Research – Evaluation of Inactivation of Murine Norovirus in Inoculated Shell Oysters by High Hydrostatic Pressure Treatment

Journal of Food Protection

ABSTRACT

One of the major foods causing norovirus gastroenteritis is bivalve shellfish, such as oysters. Depuration and relaying methods have been used to control norovirus. However, these methods may be inadequate to control norovirus gastroenteritis. The present study aimed to investigate the effectiveness of high hydrostatic pressure (HHP) treatment in controlling norovirus in shelled oysters, by evaluating the inactivating effect of HHP on murine norovirus strain 1 (MNV-1) inoculated into a buffer, oyster homogenate, and shelled oysters. First, MNV-1 was inoculated (infectivity of 4.5 log PFU/mL) into the buffer and oyster homogenate, with a pH of 6.3 and salinity (NaCl) of 1.5%, mimicking the habitats of the Pacific oyster (Crassostrea gigas). HHP treatment at 100, 200, 275, and 300 MPa for 2 and 5 min was conducted at an initial temperature of 0 or 5°C. The infectivity of MNV-1 in both the buffer and the oyster homogenate was lower when the initial temperature was 0°C. In the buffer, the infectivity of MNV-1 decreased to 1.8 log PFU/mL after HHP treatment (200 MPa for 5 min at 0°C), and the inactivating effect was higher in the buffer than in the oyster homogenate. MNV-1 was inoculated into shelled oysters (4.8 log PFU per oyster), and HHP treatment was done at 275, 300, and 350 MPa for 5 min at the initial temperature of 0°C. The infectivity of MNV-1 decreased to 2.8 log PFU per oyster after HHP treatment at 275 MPa for 5 min. The results indicate that the inactivating effect of HHP treatment varies, depending on the medium surrounding the viral particles. Inactivation was best in buffer, followed by oyster homogenate and shelled oysters. The data could inform the development of methods to control norovirus in oysters.

HIGHLIGHTS
  • HHP inactivation of MNV-1 was more pronounced at 0°C than at 5°C.

  • Inactivation differed, depending on the medium surrounding the virus.

  • HHP at 275 MPa for 5 min at 0°C inactivated MNV-1 inoculated in shucked oysters.

Research -Prevalence and Genetic Analysis of Salmonella enterica from a Cross-Sectional Survey of the New Zealand Egg Production Environment

Journal of Food Protection

ABSTRACT

Epidemiological evidence suggests that Salmonella on New Zealand eggs is not an important pathway for human salmonellosis. However, robust nationally representative data for Salmonella contamination of eggs is not available to support this. To better understand the exposure of New Zealand commercial eggs to Salmonella, a cross-sectional survey collected data on prevalence and serotypes of Salmonella in the feed, laying sheds (feces, dust, and boot or manure belt swabs), and packhouses (egg contact surfaces) of New Zealand commercial egg layer farms. Salmonella was not detected on 16 of 28 surveyed farms, and 4 farms had only one positive sample. Of the 43 (13.3%) of 323 Salmonella-positive samples, dust samples had the highest prevalence (19 of 67, 28.4%), followed by boot or manure belt swabs (11 of 67, 16.4%), feces (7 of 67, 10.4%), packhouse egg contact surfaces (5 of 87, 5.7%), and feed (1 of 33, 3.0%). A significantly higher prevalence was from caged (33 of 75, 44.0%; P < 0.001) compared with cage-free (4 of 126, 3.2%) systems, yet multiple practices differ between laying systems, which could influence prevalence. Salmonella-positive packhouse samples were only identified on the three farms with the highest laying shed prevalence, and isolates were genetically related (as determined by single nucleotide polymorphism analyses) suggesting cross-contamination between the laying shed and packhouse surfaces. Serotypes isolated included Salmonella Infantis, Salmonella Thompson, Salmonella Typhimurium, Salmonella Anatum, and Salmonella Mbandaka. Importantly, Salmonella Enteritidis, which causes egg-associated outbreaks internationally, was not isolated. Genomic comparisons of isolates supported the presence of a common contamination source in the shed and farm environments rather than multiple sporadic contamination events. This survey establishes a benchmark of Salmonella prevalence and types in the New Zealand egg production environment and provides a reference point for assessing the impact of changes to practices on Salmonella prevalence.

HIGHLIGHTS
  • Salmonella prevalence was lower than from similar international surveys.

  • The highest prevalence was from pooled dust samples.

  • Salmonella occurred on packhouse egg contact surfaces from high-prevalence farms.

  • Isolates from the same farm, laying shed, and packhouse were genetically related.

  • Isolates included common New Zealand serotypes; Salmonella Enteritidis was not found.

USA – Lincoln Correctional Center Salmonella Outbreak Sickens 6 in Nebraska

Food Poisoning Bulletin

A Lincoln Correctional Center Salmonella outbreak in Nebraska has sickened at least six inmates, according to a press release by the Nebraska Department of Correctional Services. Food poisoning outbreaks at prisons and jails are fairly common because of close quarters and serving large quantities of food.

USA -Statement on new findings and current status of the romaine lettuce E. coli O157:H7 outbreak investigation

FDA

Today, the U.S. Food and Drug Administration is providing an update on our investigation of an outbreak of E. coli O157:H7 illnesses linked to romaine lettuce. The FDA takes our responsibility of protecting the public from unsafe food very seriously and is committed to providing the public with more information as it becomes available.

Outbreaks Reported

Early on, based on test results provided by the Maryland Department of Health, our investigation pointed to farms in Salinas, California, as potential sources of contaminated romaine lettuce based on the initial, limited number of reported illnesses. The FDA, in partnership with the California Department of Public Health and the California Department of Food and Agriculture, rapidly mobilized in November to concurrently deploy inspection teams to the farms identified through the initial traceback investigation. The on-site investigations at these farms included collecting a wide-variety of samples for lab testing, including water, soil, soil amendments, scat and swab samples. While the majority of these samples tested negative for the outbreak strain, final results are pending and the Wisconsin Department of Health Services recently reported that it had isolated E. coli O157:H7 from a particular bag of pre-washed, chopped romaine lettuce.

The FDA has also been tracking two additional and separate outbreaks of E. coli O157:H7.

Earlier this week, the FDA, U.S. Centers for Disease Control and Prevention (CDC), and the Canadian Food Inspection Agency announced an outbreak linked to Fresh Express Sunflower Crisp Chopped Salad Kits. To date, the CDC reported eight confirmed cases in the U.S. across three states associated with this cluster of illnesses.The Public Health Agency of CanadaExternal Link Disclaimer also reports 24 cases in six Canadian provinces.

Concurrently, the FDA has been working with health officials in Washington State regarding an outbreak of E. coli O157:H7 associated with romaine consumption at a local restaurant chain. Washington State officials reported 10 confirmed and three probable cases in this outbreak with all reports of exposure in early to mid-November.

It should be noted; these are currently being considered as three separate outbreaks caused by three different strains of E. coli O157:H7.

USA -Investigation of E. coli O157:H7 Outbreak Linked to Romaine from Salinas, California, November 2019

FDA

December 12, 2019

Case Counts

Total Illnesses: 102
Hospitalizations: 58
Deaths: 0
Last illness onset: November 18, 2019
States with Cases:  AZ (3), CA (4), CO (6), FL (1), IA (1), ID (3), IL (1), MD (4), MI (1), MN (3), MT (1), NE (1), NJ (7), NC (1), NM (2), OH (12), OR (1), PA (8), SD (1), TX (4), VA (4), WA (2), WI (31)

Recommendation

FDA, CDC, and state health authorities are investigating an outbreak of illnesses caused by E. coli O157:H7 in the United States. Epidemiologic, laboratory, and traceback evidence indicates that romaine lettuce from the Salinas, California growing region is a likely source of this outbreak. According to CDC, there have been 102 cases reported in 23 states.  The latest date that one of these patients reports becoming ill was on November 18, 2019.

Romaine from Salinas, California Label Enjoy By December 2, 2019

 

Romaine from Salinas, California Label Use By November 29, 2019

Consumers: Consumers should not eat romaine lettuce harvested from Salinas, California. Additionally, consumers should not eat products identified in the recall announced by the USDA on November 21, 2019.

Romaine lettuce may be voluntarily labeled with a harvest region. If this voluntary label indicates that the romaine lettuce was grown in “Salinas” (whether alone or with the name of another location) do not eat it. Throw it away or return it to the place of purchase.  If romaine lettuce does not have information about harvest region or does not indicate that it has been grown indoors (i.e., hydroponically- and greenhouse-grown), throw it away or return it to the place of purchase. Consumers ordering salad containing romaine at a restaurant or at a salad bar should ask the staff whether the romaine came from Salinas.  If it did, or they do not know, do not eat it.

At this time, romaine lettuce that was harvested outside of the Salinas region has not been implicated in this outbreak investigation. Hydroponically- and greenhouse-grown romaine, which is voluntarily labeled as “indoor grown,” from any region does not appear to be related to the current outbreak. There is no recommendation for consumers to avoid using romaine harvested from these other sources.

Restaurants and Retailers: Restaurants and retailers should not serve or sell romaine harvested from Salinas, California.  If you do not know the source of your romaine lettuce, and if you cannot obtain that information from your supplier, you should not serve, nor sell it.

Suppliers and Distributors: Suppliers, distributors and others in the supply chain should not ship or sell romaine harvested in Salinas, California. If the source of the romaine lettuce is unknown, you should not ship, nor sell the product.

For Restaurants, Retailers, Suppliers and Distributors: Currently, the FDA does not have enough traceback information to identify the specific source of the contamination that would allow us to request a targeted recall from specific growers.

FDA requested that industry voluntarily withdraw romaine grown in Salinas from the market and is requesting that industry withhold distribution of Salinas romaine for the remainder of the growing season in Salinas. Without more specific traceback information, this was the most efficient way to ensure that contaminated romaine was off the market.

At this time, romaine lettuce that was harvested outside of the Salinas region has not been implicated in this outbreak investigation. Hydroponically- and greenhouse-grown romaine, which is voluntarily labeled as “indoor grown,” from any region does not appear to be related to the current outbreak. There is no recommendation for consumers or retailers to avoid using romaine harvested from these other sources.

Update

Based on the information indicating that ill people in Maryland were exposed to romaine lettuce harvested in Salinas, California, FDA, with the assistance of staff from the California Department of Public Health and the California Department of Food and Agriculture, immediately deployed investigators to three farms in the Salinas area that were identified based on the traceback investigation.

FDA continues to actively investigate the cause of this outbreak. Additionally, FDA is investigating two other E. coli outbreaks, each caused by strains that are different from each other and different from the larger outbreak. One of the additional outbreaks, in Washington state, is linked to romaine lettuce, and the other outbreak, with cases in the U.S. and Canada, is linked to Fresh Express Sunflower Crisp Chopped Salad Kits. As part of these investigations, FDA and state partners are conducting traceback investigations to trace romaine exposures to the source.

Currently, the tracebacks on all three outbreaks have identified a common grower in Salinas. FDA, CDC, and California partners are deploying a team to conduct new investigations at several ranches used by this grower as we try to identify the source of the contamination.

Europe – Salmonella the most common cause of foodborne outbreaks in the European Union

ECDC

Nearly one in three foodborne outbreaks in the EU in 2018 were caused by Salmonella. This is one of the main findings of the annual report on trends and sources of zoonoses published today by the European Food Safety Authority (EFSA) and the European Centre for Disease Prevention and Control (ECDC).

In 2018, EU Member States reported 5 146 foodborne outbreaks affecting 48 365 people. A foodborne disease outbreak is an incident during which at least two people contract the same illness from the same contaminated food or drink.

Slovakia, Spain and Poland accounted for 67% of the 1 581 Salmonella outbreaks. These outbreaks were mainly linked to eggs.

 “Findings from our latest Eurobarometer show that less than one third of European citizens rank food poisoning from bacteria among their top five concerns when it comes to food safety. The number of reported outbreaks suggests that there’s room for raising awareness among consumers as many foodborne illnesses are preventable by improving hygiene measures when handling and preparing food” said EFSA’s chief scientist Marta Hugas.

Salmonellosis was the second most commonly reported gastrointestinal infection in humans in the EU (91 857 cases reported), after campylobacteriosis (246 571).

Shiga toxin-producing E. coli (STEC) has become the third most common cause of foodborne zoonotic disease with 8 161 reported cases – replacing yersiniosis with a 37% increase compared to 2017. This may be partly explained by the growing use of new laboratory technologies, making the detection of sporadic cases easier.

Of the zoonotic diseases covered by the report, listeriosis accounts for the highest proportion of hospitalised cases (97%) and highest number of deaths (229), making it one of the most serious foodborne diseases.

The number of people affected by listeriosis in 2018 is similar to 2017 (2 549 in 2018 against 2 480 the previous year). However, the trend has been upward over the past ten years.

The report also includes data on Mycobacterium bovis, Brucella, Yersinia, Trichinella, Echinococcus, Toxoplasma, rabies, Coxiella burnetii (Q fever), and tularaemia.

Read the report

Publication

The European Union One Health 2018 Zoonoses Report

Surveillance report – 

This report of the European Food Safety Authority and the European Centre for Disease Prevention and Control presents the results of zoonoses monitoring activities carried out in 2018 in 36 European countries (28 Member States (MS) and 8 non-MS).

e.

RASFF Alerts – Salmonella – Chilled Chicken – Chicken Thighs – Black Pepper – Rope Mussels – Long Pepper – Eggs – Chilled Beef – Chicken Fillet – Salted Chicken Breast – Chicken Quarters

RASFF-Logo

RASFF – Salmonella enterica ser. Enteritidis (presence /25g) in chilled chicken with neck from Poland in Latvia

RASFF – Salmonella enterica ser. Infantis (presence /25g) in chilled chicken thighs from Romania in Slovakia

RASFF – Salmonella (presence /25g) in black pepper from Brazil in the Netherlands

RASFF – Salmonella (presence /25g) in organic rope mussels from Ireland in France

RASFF – Salmonella (presence /25g) in long pepper (Piper longum) from Vietnam in Germany

RASFF – Salmonella enterica ser. Enteritidis (suspected) in eggs from Poland in Poland

RASFF – Salmonella (present /25g) in chilled beef from the Netherlands in Sweden

RASFF – Salmonella enterica ser. Enteritidis (presence /25g) in chilled chicken fillet from Poland in Lithuania

RASFF – Salmonella (presence /25g) in frozen salted chicken breast from Brazil, via the Netherlands in Croatia

RASFF – Salmonella group C (in 5 out 5 samples /25g) in chilled chicken quarters from Poland in Poland

RASFF Alerts – Aflatoxin – Dried Figs – Groundnuts – Sea Flower Peanuts – Dried Chopped Hazlenuts

RASFF-Logo

RASFF – aflatoxins (B1 = 7.93; Tot. = 16 µg/kg – ppb) in dried figs from Turkey in Slovakia

RASFF – aflatoxins (B1 = 5.8; Tot. = 6.5 µg/kg – ppb) in groundnuts from China in Portugal

RASFF – aflatoxins (B1 = 11; Tot. = 13 µg/kg – ppb) in groundnut kernels from the United States in the Netherlands

RASFF – aflatoxins (B1 = 14 µg/kg – ppb) in seaflower peanuts from China in Portugal

RASFF – aflatoxins (B1 = 18.9; Tot. = 21.2 µg/kg – ppb) in groundnut kernels from the United States in the UK

RASFF – aflatoxins (B1 = 22.1; Tot. = 67.4 µg/kg – ppb) in dried figs from Turkey in Germany

RASFF – aflatoxins (B1 = 15.3; Tot. = 53 µg/kg – ppb) in dried chopped hazlenuts from Turkey in Germany

RASFF – aflatoxins (B1 = 12.29; Tot. = 27.50 µg/kg – ppb) in dried figs from Turkey in Germany

RASFF Alerts -Ochratoxin A- Buckflour – Raisins – Spelt Flour

RASFF-Logo

RASFF – ochratoxin A (5.6 µg/kg – ppb) in buckflour from Poland in Poland

RASFF – ochratoxin A (21.5 µg/kg – ppb) in raisins from Uzbekistan, via Hungary in Latvia

RASFF – ochratoxin A (30 µg/kg – ppb) in raisins from China in Denmark

RASFF – ochratoxin A (7.1 µg/kg – ppb) in spelt flour from Belgium, manufactured in Germany in Luxembourg