Human norovirus (HuNoV) is one of the leading causes of acute gastroenteritis globally. HuNoV outbreaks have been recently reported during air travels. Contaminated surfaces are known as a critical transmission route at various settings. The aim of this study was to provide key information about the survival and the decontamination of HuNoV on three commonly touched airplane cabin surfaces.
In this study, we monitored the survival of HuNoV on seat leather, plastic tray table, and seatbelt for 30 days, with and without additional organic load (simulated gastric fluid). The efficacy of two EPA registered anti-norovirus disinfectants were also evaluated. Results showed that HuNoV was detected at high titers (>4 log10 genomic copy number) for up to 30 days when additional organic load was present. Both tested disinfectants were found highly ineffective against HuNoV when the surface was soiled. The study showed that when the organic load was present, HuNoV was highly stable and resistant against disinfectants.
Findings from this study indicated that appropriate procedures should be developed by airline companies with the help of public health authorities to decrease passengers’ exposure risk to HuNoV.
Survival and inactivation of human norovirus GII.4 Sydney on commonly touched airplane cabin surfaces
Public Health 29 July 2020
Dorra Djebbi-Simmons, Mohammed Alhejaili, Marlene Janes, Joan King and Wenqing Xu*
Chipotle Mexican Grill Inc. will, according to Edvard Pettersson of Bloomberg, pay a $25 million criminal fine to resolve allegations by federal prosecutors that its food sickened more than 1,100 people across the U.S. from 2015 to 2018.
It’s the largest fine ever imposed in a food-safety case, according to a statement by the U.S. attorney’s office in Los Angeles.
The criminal charges pertain in part to norovirus outbreaks at Chipotle restaurants. The highly contagious virus can be transmitted by infected food workers handling ready-to-eat foods and their ingredients, according to the statement. It can cause severe symptoms, including diarrhea, vomiting and abdominal cramping.
“Chipotle failed to ensure that its employees both understood and complied with its food safety protocols, resulting in hundreds of customers across the country getting sick,” U.S. Attorney Nick Hanna said in the statement announcing the deferred-prosecution agreement.
The Newport Beach, California-based company said that, as part of the agreement, it will its strengthen its food-safety polices and practices.
“This settlement represents an acknowledgment of how seriously Chipotle takes food safety every day and is an opportunity to definitively turn the page on past events and focus on serving our customers real food made with real ingredients that they can enjoy with confidence,” Brian Niccol, chairman and chief executive officer of the company, said in a statement.
Prosecutors alleged that four norovirus outbreaks were caused by employees showing up to work sick, in violation of company policy, and by food products being stored at the wrong temperatures.
A fifth outbreak — which sickened about 647 people in July 2018 who dined at a Chipotle in Ohio — was from Clostridium perfringens, a bacterium found in raw meat and poultry that is one of the most common types of foodborne illness in the U.S. People who get ill from it usually recover in 24 hours and it’s not contagious.
Managers at the company’s restaurants failed on a number of occasions to notify Chipotle’s safety group at its headquarters when an employee had been vomiting at work, according to prosecutors. Instead, the safety analysts would find out only after contacting the restaurant because it had received a complaint from a sick customer. As a result, there were days of delay before the restaurants were sanitized.
Up-to-date estimates of the burden of norovirus, a leading cause of acute gastroenteritis (AGE) in the United States, are needed to assess the potential value of norovirus vaccines in development. We aimed to estimate the rates, annual counts, and healthcare charges of norovirus-associated ambulatory clinic encounters, Emergency Department (ED) visits, hospitalizations, and deaths in the United States.
We analyzed administrative data on AGE outcomes from July 1, 2001 through June 30, 2015. Data were sourced from IBM® MarketScan® Commercial and Medicare Supplemental Databases (ambulatory clinic and ED visits), the Healthcare Utilization Project National Inpatient Sample (NIS; hospitalizations), and the National Center for Health Statistics multiple-cause-of-mortality (MCM) data (deaths). Outcome data (ambulatory clinic and ED visits, hospitalizations, or deaths) were summarized by month, age group, and setting. Healthcare charges were estimated based on insurance claims. Monthly counts of cause-unspecified gastroenteritis-associated outcomes were modeled as functions of cause-specified outcomes, and model residuals were analyzed to estimate norovirus-associated outcomes. Healthcare charges were estimated by applying average charges per cause-unspecified gastroenteritis encounter to the estimated number of norovirus encounters.
We estimate 900 deaths (95% Confidence Interval [CI]: 650 – 1100), 110,000 hospitalizations (95%CI: 80,000 – 145,000), 470,000 ED visits (95% CI: 348,000 – 610,000), and 2.3 million ambulatory clinic encounters (95% CI: 1.7 – 2.9 million) annually due to norovirus, with an associated $430 – 740 million in healthcare charges.
Norovirus causes a substantial health burden in the United States each year, and an effective vaccine could have important public health impact.
The burden of norovirus in the United States, as estimated based on administrative data: Updates for medically attended illness and mortality, 2001-2015, 14 April 2020
Foodborne enteric viruses, in particular HuNoV and HAV, are the most common cause of the berry-linked viral diseases, and outbreaks around the world, and have become an important concern for health authorities. Despite the increased importance of berry fruits as a vehicle for foodborne viruses, there is limited information concerning the fate of foodborne viruses in the berry supply chain from farm to consumer.
A comprehensive understanding of berry-associated viral outbreaks – with a focus on contamination sources, persistence, survival, and the effects of current postharvest and processing interventions and practices – is essential for the development of effective preventative strategies to reduce risk of illness.
The purpose of this paper is twofold; (i) to critically review the published literature on the current state of knowledge regarding berry-associated foodborne viral outbreaks and the efficiency of berry processing practices and (ii) to identify and prioritize research gaps regarding practical and effective mechanism to reduce viral contamination of berries.
The review found that fecally infected food handlers were the predominant source of preharvest and postharvest pathogenic viral contamination. Current industrial practices applied to fresh and frozen berries demonstrated limited efficacy for reducing the viral load. While maintaining best practice personal and environmental hygiene is a key intervention, the optimization of processing parameters (i.e., freezing, frozen storage, and washing) and/or development of alternative processing technologies to induce sufficient viral inactivation in berries along with retaining sensory and nutritional quality, is also an important direction for further research.
Outbreaks, occurrence, and control of norovirus and hepatitis A virus contamination in berries: a review, 03 February 2020
A report by the UK Health Protection Agency concluded that 529 patrons paying a ridiculous amount of money for food-porn styled dishes were sickened with Norovirus – this at a restaurant that only seats 40 patrons per night — introduced through contaminated shellfish, including oysters that were served raw and razor clams that may not have been appropriately handled or cooked.
Investigators identified several weaknesses in procedures at the restaurant that may have contributed to ongoing transmission including: delayed response to the incident, the use of inappropriate environmental cleaning products, and staff working when ill. Up to 16 of the restaurant’s food handlers were reportedly working with Norovirus symptoms before it was voluntarily closed.
Last week it was announced that Heston Blumenthal’s scandal-plagued Australian restaurant appears doomed after its landlord and financial backer, Crown Casino, said it had moved to terminate its lease.
The company behind the Dinner by Heston restaurant appointed provisional liquidators just before Christmas. It came just days after it missed a deadline with the Fair Work Ombudsman to pay back staff the millions it owed them for underpayment.
In a statement Crown said due to the appointment of the provisional liquidator “it has taken action” to terminate the lease of restaurant owner Tipsy Cake Pty Limited.
“While this is disappointing, Crown is working to provide assistance to Tipsy Cake employees looking for employment within Crown,” a Crown spokeswoman said. “The provisional liquidator of Tipsy Cake, however, will need to deal with employee matters at the first instance.”
In December 2018, a Sunday Age investigation revealed that Dinner by Heston was dramatically underpaying staff and Tipsy Cake, the company that owned the restaurant, was based in a notorious tax haven.
The investigation revealed chefs at the Southbank eatery regularly worked 25 hours of unpaid overtime a week. That pushed pay down to as little as $15 to $17 an hour, well below the minimum rates of the award, the wages safety net.
The Fair Work Ombudsman soon after launched an investigation.
The spokeswoman said Crown would allow customers who purchased Dinner by Heston gift cards to exchange them for Crown gift cards. No timeframe was provided by Crown on when the lease of one of its high-profile tenants would end.
The move to terminate the lease creates further uncertainty for employees who had hoped that Crown may financially support the restaurant to keep it open.
Crown had provided the business – one of its marquee tenants – with a $750,000 interest free loan. Industry sources said the interest free loan could have been used as a way to lure such a high profile business to the casino, boosting its appeal to visitors
Before Christmas Fair Work Ombudsman Sandra Parker said it was disappointing that Tipsy Cake had not resolved the underpayment issue before it went into provisional liquidation.
Accounts for the Dinner by Heston restaurant show it has reported persistent losses since opening in Melbourne in 2015.
The accounts disclosed it was dependent on interest free loans from a related company run through a Caribbean tax haven and Crown Melbourne ‘’to continue operating’’.
But its opaque structure – restaurant owner Tipsy Cake is based on the volcanic Caribbean island of Nevis – made it hard to determine the true health of the business.
The ownership of companies incorporated in Nevis is never disclosed so there is no way to know who is behind companies created there.
But the company has said Blumenthal sold his shareholding more than a decade ago but remained its chef patron and “integral’’ to its operation.
Researchers at the Baylor College of Medicine report some people call it the ship cruise virus, but norovirus can be found in many other places. People can catch this very contagious virus from an infected person, contaminated food or water or by touching contaminated surfaces. The virus causes acute gastroenteritis – the stomach and/or the intestines get inflamed, and this leads to stomach pain, nausea, diarrhea and vomiting. Noroviruses are the leading cause of foodborne illness.
Teams of researchers around the world have been working for more than four decades to find a way to grow this virus in the lab. Success came in 2016 from the laboratory of Dr. Mary K. Estes at Baylor College of Medicine, where she and her colleagues grew, for the first time, noroviruses in laboratory cultures of human intestinal epithelial cells.
This work, published in Science, represents a major step forward in the study of human gastroenteritis viruses because it is allowing researchers to explore and develop procedures to prevent and treat infection and to better understand norovirus biology.
“In the Science paper, we showed that bile, a yellowish fluid produced by the liver that helps digest fats in the small intestine, was key to successfully culturing certain strains of norovirus in the lab,” said Victoria R. Tenge, graduate student of molecular virology and microbiology in the Estes’s lab. “The work discussed here (of which Tenge is co-first author) shows the results of our continuing investigations to identify the bile components that are involved in promoting norovirus infection.”
The researchers worked with human enteroids, a laboratory model of human intestinal cells that retains properties of the small intestine and is physiologically active.
“Mini-guts, as we call them, closely represent actual small intestine tissue, and, importantly, they support norovirus growth, allowing researchers to study how this virus causes disease,” said co-first author Dr. Umesh Karandikar, a research scientist in the Estes lab.
The researchers discovered that bile acids and ceramide in bile were necessary for viral infection.
“Interestingly, we also discovered that bile acids stimulated the process of endocytosis in mini-guts, which was not previously appreciated. Endocytosis is a normal cellular process that cells use to acquire materials from their environment,” said corresponding author, Dr. Mary K. Estes, Cullen Foundation Endowed Professor Chair of Human and Molecular Virology at Baylor College of Medicine and emeritus founding director of the Texas Medical Center Digestive Diseases Center.
Their findings led the researchers to propose that as bile acids activate endocytosis, they create a stage that norovirus takes advantage of by riding along with it to enter the cells and subsequently replicate, causing disease.
“This strategy works well for a food-borne virus,” said co-first author Dr. Kosuke Murakami, who was working in the Estes lab during most of this project. He is currently at the National Institute of Infectious Diseases in Tokyo. “As people ingest food, the body’s normal response is to secrete bile into the small intestine. Noroviruses contaminating food piggyback on this natural bodily response to invade cells in the small intestine, replicate and cause disease.”
We talk a lot about Norovirus because there are a lot of outbreaks and a lot of sick people.
In July 2018, recombinant norovirus GII.Pe-GII.4 Sydney was detected in dogs who had diarrhea in a kennel and in children living on the same premises in Thailand. Whole-genome sequencing and phylogenetic analysis of 4 noroviruses from Thailand showed that the canine norovirus was closely related to human norovirus GII.Pe-GII.4 Sydney, suggesting human-to-canine transmission.
WTVR reports health officials announced Saturday an extension of the ban on shellfish harvesting in the waters off Parrot Island in the Rappahannock River in Middlesex County.
The news comes after Virginia Department of Health officials banned the harvesting of oysters and clams in that stretch of the river on Dec. 27 following a Norovirus outbreak in Colorado linked to shellfish harvested from the area.
As a result, oysters harvested between Dec. 1, 2019 through Jan. 11, 2020 are being recalled.
The only oysters affected by the recall were shipped by Rappahanock River Oyster Company from lease numbers 18403, 18417, and 19260 in the Rappahanock River, according to the Virginia Department of Health. The company said the oysters were sold under the Emersum brand name.
Officials noted crabs and fin fish in the river are still safe to catch.
Outbreak News Today reports that French health authorities (Santé publique France) say since December 2019, 179 compulsory declarations (DO) of collective food poisoning ( toxi-infection alimentaire collective-TIAC) suspected of being linked to the consumption of raw shellfish, mainly oysters.
The reports come from the majority of regions in mainland France.
Seventy-seven percent of cases occurred since December 23, with the peak of patients being observed around December 25-27.
The symptoms, mainly diarrhea and vomiting, as well as the incubation times, are compatible with infections with norovirus or other enteric viruses. Stool tests performed to date by the National Reference Center for Gastroenteritis Viruses have confirmed the presence of norovirus and other enteric viruses.
The number of TIAC suspected of being linked to the consumption of raw shellfish is significantly higher than in previous years. Each year between 25 and 120 TIAC suspected of being linked to the consumption of shellfish are reported to Public Health France, of which between 4 and 30 occurred during the December-January periods.