In March of this 12 months in might be 4 years since I boarded a flight from Seattle to Johannesburg (20 plus hour flight) to talk at a meals protection convention simply days after the South African well being government introduced {that a} Listeria outbreak have been related to a product named polony manufactured through the biggest meals producer in Africa.
I recall how identical it felt to the early days of the Jack-in-the-Field E. coli outbreak of 1993– how everybody gave the impression truthfully surprised that this kind of tragedy may just occur.
I’ve spent the final 4 years operating (being 10 hours at the back of has required a ways too many past due nights and early morning calls) with a cadre of wonderful attorneys and extra wonderful group of workers transferring ahead within the first foodborne sickness magnificence motion in Africa. Now we have a lot to do to search out justice to the greater than 1,000 sickened and their households. I’m saddened through the tempo of the litigation, however decided to deal with our magnificence contributors – we need to paintings more difficult.
Segment 61 of the Shopper Coverage Act, 2008 (“CPA”) supplies that manufacturers, importers, vendors and/or shops of products (jointly the “provider(s)”) could also be held answerable for any hurt led to on account of the availability of unsafe items, product failure, a defect or danger within the product, insufficient directions for the usage of items or warnings associated with any conceivable danger that may well be related to the product, whether or not or no longer there used to be “fault” at the a part of the provider.
BACKGROUND
In 2017 and 2018, the arena’s biggest and deadliest outbreak of listeriosis came about in more than one provinces of South Africa, as observed in Determine 1. The outbreak used to be led to through infected polony, a ready-to-eat, processed meat product. Able-to-eat, processed meats are a well known automobile for listeriosis outbreaks (Thomas et al., 2020). The Minister of Well being declared that there used to be a deadly disease of listeriosis on December 5, 2017, that used to be related to polony emanating from Tiger Manufacturers’ Undertaking Meals manufacturing facility in Polokwane on March 4, 2018.
Determine 1. Prevalence of Laboratory-Showed Listeriosis Instances all the way through the Outbreak Length, In step with South African Districts (Thomas et al., 2020).
Instances have been reported from around the nation, with maximum instances reported from Gauteng Province (58%). Girls accounted for 55% of general instances. The ages of instances ranged from beginning to 93 years. Neonates (elderly £ 28 days) have been essentially the most affected age staff, accounting for 43% of instances. This used to be adopted through adults of 15 to 49 years of age, accounting for 32% of instances. The illness result used to be identified for 806/1,060 (76%) of instances; 27% (216/806) had the identified result “died” (Smith et al., 2019).
Listeriosis is a significant foodborne an infection with a case-fatality charge (“dying charge”) of 20-30% (Thomas et al., 2020). Other people essentially suffering from listeriosis have impaired cell-mediated immunity. This comprises those that are pregnant, aged, or immunocompromised from prerequisites corresponding to HIV, persistent illness, or immunosuppressive remedy (Thomas et al., 2020). The particular outbreak pressure related to the outbreak used to be Listeria monocytogenes series kind 6 (LmST6). There are two ways in which listeriosis can manifest: febrile gastroenteritis and invasive listeriosis (Coulombier). Invasive listeriosis is characterised through bacteremia, meningitis, pneumonia, endocarditis, and sepsis (Smith et al., 2019).
A complete of one,060 instances have been reported all the way through the outbreak duration of January 11, 2017, to July 17, 2018 (Determine 2). The outbreak duration used to be outlined as a length of time all the way through which case numbers exceeded and remained above a weekly threshold of 5 instances consistent with epidemiological week (Thomas et al., 2020). On the height of the outbreak (mid-November 2017), 41 listeriosis instances have been reported in one week. Previous to this outbreak, listeriosis used to be no longer a reportable illness in South Africa; subsequently, knowledge isn’t to be had at the incidence, epidemiology, and outline of clusters/outbreaks on listeriosis. Because of the loss of surveillance knowledge, the baseline selection of listeriosis instances used to be estimated from counts of listeriosis instances in 2016.
It’s identified that during 2015 and 2016, clusters of listeriosis came about in South Africa. The 2015 listeriosis cluster concerned 7 instances general, and the foremost pressure used to be Lm ST6. Alternatively, researchers discovered that the 2015 cluster didn’t represent a deadly disease (Shuping et al., 2015). For the 2016 cluster, retrospective research of Lm instances from the years 2012-2016 used to be used to calculate the anticipated case numbers for years 2013, 2014, 2015, and 2016 within the Gauteng province (Mathebula et al., 2016). As a result of there have been simplest 3 instances within the 2016 outbreak, researchers had to estimate the baseline selection of instances. When figuring out if a cluster of illnesses is assessed as a deadly disease or epidemic, it is very important to understand what the baseline selection of diseases is within the inhabitants of passion. An endemic refers to an building up within the selection of instances of a illness, above what’s usually anticipated in that inhabitants in that space, and a deadly disease is outlined the similar however is regularly used for a extra restricted geographic space (Heart for Illness Keep watch over and Prevention [CDC], 2012).
Determine 2. Distribution of Laboratory-Showed Instances of Listeriosis, In step with Outbreak Week and Main Occasions (January 1, 2017 to August 21, 2018) (Thomas et al., 2020).
CASE IDENTIFICATION AND MICROBIOLOGICAL INVESTIGATION
Case definitions are utilized in outbreak investigations to assist determine instances who’re related to the outbreak. A case definition comprises standards corresponding to the topic inhabitants, implicated location, time, medical options, and/or laboratory take a look at effects if to be had (CDC, 2012).
The preliminary case definition for this outbreak incorporated all instances of listeriosis that came about in South Africa from 2017 to 2018. The preliminary case definition used to be suitable because of the loss of whole-genome sequencing (WGS) knowledge firstly of the outbreak. Multilocus sequencing typing (MLST) used to be used after to research the WGS effects. Researchers came upon that 93% of the medical isolates accumulated from instances within the outbreak duration have been Listeria monocytogenesseries kind 6 (Lm ST6) (Thomas et al., 2020; Gerner-Smidt). The case definition later incorporated series typing knowledge to extend the possibility of figuring out a commonplace supply (Besser). This discovering additionally confirmed that the outbreak used to be targeted across the ST6 pressure, that means that anyone inflamed with the ST6 pressure, in South Africa, will have been regarded as a sufferer of this outbreak all the way through the outbreak duration, sooner than the outbreak duration (when the environmental samples examined sure for ST6), and after the outbreak duration (when infected merchandise will have nonetheless been found in houses) (Coulombier).
Determine 3. NCBI WGS Tree.
Even though microbiological proof comes in handy, a case definition with out subtyping knowledge can nonetheless be good enough in fixing a deadly disease (Besser). More than one elements can also be considered to resolve if a case is related to a deadly disease irrespective of in the event that they have been laboratory showed or no longer. As mentioned above, 93% of medical isolates have been ST6; alternatively, no longer all isolates may well be sequenced, because of the loss of laboratory sources and team of workers to be had (Besser). In accordance with the excessive proportion of ST6 medical isolates, we will suppose {that a} identical selection of non-sequenced isolates would had been categorized as ST6 if sequencing will have been accomplished (Coulombier). One more reason that we will suppose that there is not any distinction between the distribution of series sorts a few of the non-sequenced samples and the distribution of series sorts noticed within the sequenced samples is since the strategy of deciding on case isolates to be sequenced used to be no longer biased. Within the absence of different knowledge, a listeriosis affected person recognized all the way through the outbreak duration had a > 90% likelihood of being associated with the outbreak even with out showed laboratory effects (Gerner-Smidt).
EPIDEMIOLOGIC INVESTIGATION
After detection of the outbreak, the Centre for Enteric Illnesses, part of the Nationwide Institute for Communicable Illnesses, carried out a nested, case-control find out about that supplied proof that instances with Lm ST6 infections have been much more likely to have eaten polony than the ones with non-ST6 infections (Thomas et. al, 2020). In outbreak investigations, case-control research is carried out to estimate the chances ratio for the affiliation between explicit meals pieces and the outbreak-associated sickness. For this nested case-control find out about, case sufferers have been the ones with Lm ST6 infections, and management sufferers have been folks with non-ST6 listeriosis all the way through the outbreak duration. Effects from this find out about display that the chances ratio used to be 8.55 with a 95% self belief period of one.66 – 43.35. An odds ratio is a measure of affiliation between the chances of having sick having ate up a selected meals merchandise as opposed to the chances of being sick having no longer ate up the particular meals merchandise (Coulombier). An odds ratio of 8.55 means that the chances of getting eaten polony in ST6 instances is 8.55 occasions more than the chances of getting eaten polony in non-ST6 instances. From the calculated self belief period, we all know that this end result is vital since the self belief period does no longer come with the null worth of one, and that 95% of the time we will be expecting the real odds ratio to fall inside of this period.
Previous to the find out about, meals historical past interviews have been carried out to generate a speculation about which meals will have been the supply of the outbreak (Coulombier). The meals histories have been carried out with the usage of a standardized questionnaire that investigated meals ate up 4 weeks previous to onset of signs. Open and close-ended questions have been applied within the interview to stop bias. The meals historical past interviews have been finished through November 1, 2017. The epidemiology strategies applied on this investigation reflected the ones utilized in high-level investigations right through the arena and have been totally suitable for the outbreak cases (Besser).
ENVIRONMENTAL INVESTIGATION
On January 13, 2018, febrile gastroenteritis evolved in 10 kids from a nursery in Gauteng Province. A number of stool samples have been accumulated from the kids, and one yielded L. monocytogenes ST6. Sandwiches ready and eaten on the nursery have been the one commonplace meals publicity, and polony used to be the typical element. Polony used to be recovered from the nursery fridge, and L. monocytogenes ST6 used to be recognized within the polony produced at Tiger Manufacturers Undertaking Facility in Polokwane (Thomas et al., 2020).
On February 2, 2018, an environmental investigation happened on the Tiger Manufacturers Undertaking Facility in Polokwane following the invention on the nursery (Gerner-Smidt). Of 317 environmental samples taken from the Polokwane facility, 47 examined sure for Listeria monocytogenes, and of the 47 that examined sure, 34 have been subtyped because the outbreak ST6 pressure. Moreover, two of 13 samples of unopened polony loaves accumulated on the facility examined sure for Listeria monocytogenes, and each have been subtyped because the outbreak ST6 pressure. Intensive environmental investigation happened in an extra 148 ready-to-eat meals producers, however the outbreak pressure used to be no longer recognized at any of the opposite producer places. The outbreak pressure of Lm ST6 used to be simplest discovered on the Tiger Manufacturers Undertaking Facility in Polokwane. This discovering means that the Undertaking Facility used to be much more likely than to not be the supply of the outbreak (Gerner-Smidt).
DISCUSSION
Via incorporating findings from the epidemiology, microbiology, and traceback knowledge, professionals have been ready to supply robust proof that the supply of the outbreak used to be polony comprised of Tiger Manufacturers Undertaking Meals Polokwane manufacturing facility. The Minister of Well being declared the supply of the outbreak on March 4, 2018, which ended in the recall of the tainted polony. The recall of the tainted polony led to a considerable lower in instances of listeriosis in South Africa. Via mid-April 2018 (6 weeks after recall), fewer than 5 instances have been reported weekly. The outbreak used to be regarded as over on September 3, 2018 (Thomas et al., 2020).
REAL STORIES
The sufferers of the 2017 listeriosis tragedy and the surviving households of those that died are taking over Tiger Manufacturers to win some type of justice and pressure some type of responsibility. A Maverick Citizen workforce travelled to all 4 corners of South Africa to inform the tales of the claimants who’re preventing again.
Carla Verlaat, 23
Carla Verlaat misplaced her first child in 2017. She went into untimely exertions at 22 weeks. Her son Shem simplest lived for twenty-four hours sooner than he died. The medical doctors advised Carla her child had a clot in his mind, and he used to be later recognized with listeriosis.
Carla Verlaat at house in Manenburg, Cape The city.At 22 weeks pregnant, Carla misplaced her child, Shem. Shem used to be recognized as having listeriosis. (Picture: Thom Pierce)
Carla cries as she speaks concerning the ache of her milk operating out of her breasts supposed for a toddler who had died. She has a unmarried image of Shem on her telephone. He’s mendacity in an incubator, with many pipes hooked up to his fragile frame, his face a gloomy gray. Since Shem passed on to the great beyond, Carla has battled together with her grief. Regardless of having long gone to remedy, she nonetheless struggles to regulate her temper swings. Infrequently she stabs her bed room door with a knife, in an try to to find some roughly unlock. She blames herself for Shem’s dying and is just too afraid to have any other child.
Annelize le Roux, 42
Annelize le Roux misplaced her “miracle child”. The 12 months sooner than giving beginning to her miracle, she terminated any other being pregnant when advised the unborn child had Down’s syndrome. She used to be advised that she would by no means have any other kid. Being therefore pregnant together with her son Andreas used to be an surprising however satisfied marvel. The circle of relatives used to be devastated when Andreas died.
Annelize and Martin Le Roux with their canine Max and their puppy lion Caesar on their farm in Winburg, Loose State. Annelize suffered a miscarriage at 23 weeks, their child boy used to be later recognized with listeriosis. (Picture: Thom Pierce)
Prior to Andreas died, Annelize’s total circle of relatives fell sick. “It used to be identical to robust flu signs,” she mentioned. Her husband Martin didn’t assume a lot of his sickness. Annelize, who’s a microbiologist, used to be decided to determine what took place. So, after Andreas died, they despatched his blood for assessments to England. The consequences showed that Andreas had shrunk listeriosis whilst in his mom’s womb. When Annelize came upon concerning the outbreak, she remoted and packaged foodstuffs from her refrigerator. When the well being inspectors got here to her house, she had ready all of the samples for them. This performed a an important function in helping the well being division in confirming the supply of the tainted foodstuffs.
Amelia Govender, 28, and Kyle Victor, 26
Amelia and Kyle have been extremely excited for the coming in their child lady, Summer time Reign. They each describe the beginning in their little lady as the most efficient day in their lives. Kyle, who had to begin with was hoping for a boy, fell in love along with his daughter to start with sight. “I noticed her, and I simply idea, ‘why did I ever desire a boy?’”
Kyle Victor and Amelia Govender at their house in Kingsburgh, KwaZulu-Natal. At someday outdated, their daughter Summer time Reign died from listeriosis. For the final two years Amelia has suffered serious well being headaches caused by listeriosis. (Picture: Thom Pierce)
Amelia and Kyle have been totally ready for his or her child. Amelia had purchased little outfits for Summer time Reign; she’d even were given her a Louis Vuitton fashion designer child blanket. She become nervous when her child’s actions began to wane. That used to be the primary signal of bother. A couple of days later, Summer time died. She and Kyle have been devastated. Amelia has tears in her eyes as she talks about how she prayed that her child would get up all the way through her funeral, however Summer time used to be long gone.
Since then, Amelia has handled debilitating well being problems. Each morning, she wakes as much as a swollen face, and regularly her decrease frame breaks out in an itchy rash that leaves welts all over the place her. She nonetheless has no longer been ready to determine the reason for her signs.
Meryl Kothiah, 38
Meryl and her husband have been taking a look ahead to having their first kid in combination in 2017. Shabeer right away began a separate financial savings account to cater for the newborn’s long term wishes. Seven months into her being pregnant, Meryl began to really feel sick. She struggled with fever off and on, till the medical doctors advised her they must carry out an emergency Caesarean phase.
Meryl and Shabeer Kothiah at house in Shallcross, KwaZulu-Natal. At seven months, Meryl needed to have an emergency Caesarean phase and gave beginning to a boy, Saiheer. Saiheer died not up to 24 hours later. He used to be recognized with listeriosis. (Picture: Thom Pierce)
Child Saiheer used to be born on 28 November 2017 and, so far as Meryl used to be conscious, the newborn used to be wholesome. When her husband arrived on the sanatorium to look her and the newborn, he discovered little Saiheer useless. Saiheer had lived not up to an afternoon sooner than he died because of a listeriosis an infection shrunk whilst in his mom’s womb. After Meryl used to be discharged from the sanatorium, she began to note that she used to be getting serious hypersensitive reactions, particularly when it used to be scorching. Her pores and skin would begin to itch badly, and welts would expand the place she scratched. She additionally described her face swelling up, such a lot in order that she is fearful of leaving the home. “I don’t need folks to look me like that,” she mentioned.
Johan Keiser, 65
Johan Keiser at house in Woodland Hill, Gauteng. In past due 2017, Johan used to be rushed to sanatorium the place he spent a complete of 25 days, 12 of that have been within the sanatorium extensive care unit. He used to be recognized with listeriosis and considers himself fortunate to be alive. (Picture: Thom Pierce)
Johan Keiser considers himself “probably the most fortunate ones”. The 65-year-old pensioner fell sick and used to be taken to sanatorium through his spouse. He has no recollection of being within the sanatorium for 25 days, 12 of which he spent within the sanatorium’s extensive care unit. “I took polony with cheese, lettuce and tomatoes to paintings each and every unmarried day, and it nearly value me my existence,” he mentioned. Whilst Johan has made a complete restoration, he notes that he has a weak spot in his legs, making it tricky for him to stand up when sitting. He has excessive reward for the medical doctors who attended to him. “I’m so thankful that they pulled me via as a result of, in keeping with me, I used to be a useless particular person for 20 days,” he says.
Anetta Masie, 44
Anetta Masie at house in Xihoko, Limpopo. Anetta spent two weeks in sanatorium being handled for listeriosis after her one-day outdated child died from the an infection. (Picture: Thom Pierce)
Anetta Masie held her child lady simplest as soon as sooner than she died. The newborn shrunk listeriosis in her womb and died quickly after beginning. Because the child used to be untimely and weighed not up to a kilogram, the fetus used to be disposed of as scientific waste. She used to be not able to have a funeral for her kid. She used to be discharged the similar day and advised to return again at a later degree to have her womb wiped clean. Anetta spent no less than two weeks in sanatorium being handled for listeriosis with antibiotic intravenous drips. When she in any case returned house to Limpopo, accompanied through her husband Thomas, her two elder kids have been devastated to search out that she didn’t come house with a toddler. “Shedding my child used to be so painful, particularly as a result of I didn’t in reality know what killed my child,” mentioned Anetta. For the reason that dying of her child lady, Anetta does no longer devour any Undertaking merchandise. She is terrified that she’s going to get sick once more.
Christina Ledwaba, 31
Christina Ledwaba at house in Mankweng, Limpopo. Since dropping her child, Mohau, to listeriosis, Christina has controlled to provide beginning to a wholesome child lady. (Picture: Thom Pierce)
“I knew one thing used to be fallacious the minute I noticed that sonar,” she mentioned. Medical doctors showed that the newborn had no heartbeat. She then gave beginning to Mohau. When the newborn used to be delivered, the nurses simply left the umbilical twine hooked up. For hours she lay at the mattress together with her useless child underneath her legs. Since then, Christina has had any other child, but if she used to be 8 months pregnant, she skilled diarrhea and began to panic, nervous that one thing used to be fallacious once more, however she used to be ready to provide beginning to a wholesome little lady. Regardless of excellent proof that her stillborn child’s dying used to be related to listeriosis, Christina nonetheless consumes Undertaking merchandise, however she makes certain that the meals is heated first.
Stephen Thokwane, 43
Stephen Thokwane is a shadow of his former self. The as soon as are compatible and wholesome guy fell sick in December 2017. What began off as a headache and flu-like signs was a nightmare for his circle of relatives.
Stephen Thokwane at his house in Steelpoort, Limpopo the place he lives along with his spouse and 4 kids. As soon as are compatible and wholesome, Stephen shrunk listeriosis and is now a shadow of his former self. (Picture: Thom Pierce)
Dumbfounded through his unexpected sickness, which he self-diagnosed as a stroke, the circle of relatives first sought non secular assist. The circle of relatives mentioned that the prophet advised the circle of relatives that they had to pray for Stephen. Stephen deteriorated and he used to be admitted to sanatorium, the place he misplaced his eyesight, struggling serious delirium and brief paralysis. The person, who used to jog 15 kilometers at a time, discovered himself having to learn to stroll once more. And whilst he’s again on his ft, his well being continues to be no longer what it used to be. He’s fatigued, and he has misplaced power. Because of this, he’s not ready to proceed his paintings as a boilermaker, one thing he did part-time but even so his formal employment, to be able to improve his circle of relatives. Thokwane is now operating in opposition to paying off a mortgage he took out to construct a area for his spouse and 4 youngsters. “After he were given so ill, he used to be nervous that he might die with out leaving us with a roof over our heads, so he took out a mortgage to construct this area,” his spouse Maggi mentioned.
Monthla Ngobeni, 37
Monthla Ngobeni is the primary named claimant within the courtroom papers. Her daughter Thetho, who is nearly two, has gone through 4 operations since she used to be born. After contracting listeriosis in her mom’s womb, Thetho evolved a situation referred to as Hydrocephalus, a build-up of fluid within the mind. A shunt that drains the fluid has been inserted into Thetho’s head to be able to set up her situation and, in the end, save her existence. She’s going to all the time have a shunt and it’ll need to be changed periodically as she grows.
Monthla Ngobeni together with her daughter, Thetho, at house in Polokwane, Limpopo. Montlha is the primary named claimant within the listeriosis magnificence motion. Thetho used to be born with serious well being headaches because of contracting listeriosis within the womb. (Picture: Thom Pierce)
The shunt has been blocked two times thus far, forcing the little lady to go through surgical procedure to take away and substitute it. Medical doctors have advised Monthla that Thetho’s construction milestones might be considerably behind schedule. At two, Thetho can not discuss but. There’s no simple task of what the longer term holds for her. Monthla has fallen into debt looking to set up each her and Thetho’s scientific expenses. She recently owes a sanatorium R26,000 for a hip substitute that she wanted because of her personal listeriosis an infection.
Ephraim Chinula, 64
Ephraim Chinula, Riley’s grandfather, at house in Eldorado Park, Soweto. After his grandson fell sick along side 9 different kids from their creche, Ephraim rallied the group, and the outcome has been the listeriosis magnificence motion. (Picture: Thom Pierce)
Ephraim Chinula is Riley Chinula’s grandfather. Riley Chinula shrunk Listeriosis along 9 different kids after consuming infected meat at their creche in Soweto. The stools from the ill kids have been investigated and ended in the primary affirmation of the listeriosis outbreak.
Riley, who used to be 3 years outdated on the time, used to be the youngest of the youngsters on the creche. All of them had excessive fevers, abdomen cramps, vomiting and diarrhea. All of the staff used to be taken to Chris Hani Baragwanath sanatorium, the place medical doctors have been waiting to obtain them.
“I were given the affect that the medical doctors knew what they have been coping with, as that they had been briefed through the native medical institution, in order that they already suspected listeriosis.” Laboratory assessments have been run at the youngsters, and it used to be showed that the kids had certainly shrunk listeriosis. When the inside track broke, the group got here in combination and dedicated themselves to in quest of justice for what they considered as negligence at the a part of Tiger Manufacturers.
Tebogo Ntjana, 31
Teddy and Tebogo Ntjana at house in Midrand, Johannesburg. They misplaced their 2d daughter to listeriosis, Tebogo and Teddy are nonetheless on the lookout for closure. (Picture: Thom Pierce)
Tebogo become very sick in October 2017 and used to be taken to sanatorium the place she later suffered a miscarriage, 4 months into her being pregnant. The medical doctors took blood samples and advised her that she had shrunk listeriosis. Now not understanding the rest concerning the sickness, Tebogo and her husband, Teddy, searched on-line for it and have been alarmed to find the severity of the situation. “We googled listeria … yoh, we were given scared.”
Pondering that it used to be a novel case, they presumed that that they had accomplished one thing to reason the sickness. One month later, the couple heard the then minister of well being, Dr Aaron Motsoaledi, pronouncing the listeriosis outbreak at the radio. The scoop got here as a aid to the couple who would regularly purchase polony and viennas from a Tiger Manufacturers manufacturing unit store in Germiston. They’ve been blaming themselves for the miscarriage because it took place. “You blame your self as for those who killed your child,” Tebogo mentioned.
This piece of each journalism and photojournalism through Nomatter Ndebele and Thom Pierce of the Maverick Citizen.
References
Besser, J. (2020). Knowledgeable Opinion Relating to a Listeria Outbreak in South Africa Involving Tiger Manufacturers Restricted.
Coulombier, D. (2020). Knowledgeable Opinion Relating to a Listeria Outbreak in South Africa Involving Tiger Manufacturers Restricted.
Meals Center of attention. (2017). An outline of the Listeria outbreak in South Africa (reality sheet).
Gerner-Smidt, P. (2020). Knowledgeable Opinion on Subtyping Sides of the Listeria Outbreak in South Africa Involving Tiger Manufacturers Restricted.
NICD. (2016). Investigation of Listeria monocytogenes instances at Charlotte Maxeke Johannesburg Instructional Health facility in Johannesburg, December 2016.
NICD. (2017). Investigation of Listeria monocytogenes instances recognized at Tshwane instructional laboratory, 1 March-30 August 2017.
NICD. (2018). The Listeria outbreak: Assembly with RSA prolonged stakeholders and WHO Listeriosis workforce (PowerPoint presentation).
Shuping, L., et al. (2015). Investigating a cluster of Listeria monocytogenes instances within the Western Cape province of South Africa, September 2015.
Smith, A. M., et al. (2016). Genome Sequences for a Cluster of Human Isolates of Listeria monocytogenes Known in South Africa in 2015. Genome Announc. 4(2): e00200-16. doi:10.1128/genomeA.00200-16.
Smith, A. M., et al. (2019). Outbreak of Listeria monocytogenes in South Africa, 2017-2018: Laboratory Actions and Reviews Related to Complete-Genome Sequencing Research of Isolates. Foodborne Pathog. Dis. 16(7): 524-530. doi:10.1089/fpd.2018.2586.
Thomas, J., et al. (2020). Outbreak of Listeriosis in South Africa Related to Processed Meat. N. Engl. J. Med. 382: 632-643. doi:10.1056/NEJMoa1907462.