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Foodborne Botulism or… Please don’t pass the olives! Unusual cases of food poisoning. Corinne Amar PhD Head of the foodborne pathogens reference services.

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Presentation on theme: "Foodborne Botulism or… Please don’t pass the olives! Unusual cases of food poisoning. Corinne Amar PhD Head of the foodborne pathogens reference services."— Presentation transcript:

1 Foodborne Botulism or… Please don’t pass the olives! Unusual cases of food poisoning. Corinne Amar PhD Head of the foodborne pathogens reference services FPRS, Gastrointestinal Bacteria Reference Unit GBRU

2 Botulism Rare but potentially fatal disease that causes paralysis Caused by neurotoxins of Clostridium botulinum and by rare strains of C. baratii and C. butyricum. Botulism affect humans and other animals 2Foodborne botulism

3 A bit of history Botulism first recorded in Europe in 1735 and that was suspected of being associated with a German sausage. It was named after the Latin word for sausage, ''botulus’’ 1817: first publication of outbreak reports In 1895, a botulism outbreak (34 cases) after a funeral dinner with smoked ham in the small Belgian village of Ellezelles led to the isolation of the pathogen Clostridium botulinum by Emile Pierre van Ermengem, bacteriologist at the University of Ghent. 3Foodborne botulism Johann von Autenrieth Emile Pierre van Ermengem 1851 – 1922 or 1932

4 The Hotel Loch Maree tragedy First recorded outbreak of botulism in the UK. Summer 1922: a group of Londoners, staying at the hotel ordered their meal to be prepared in advance. Potted duck had been on the menu all summer and on the 14 th August, the last of the duck meat from the glass jar was scrapped to make sandwiches which were wrapped for a picnic. All 8 people ate the sandwiches. By following morning they were all ill. 72h later, 6 people were dead and the other 2 died within the next 5 days. Bruce White from University of Bristol isolated Clostridium ‘botulinus’ from remainder of one sandwich. 4Foodborne botulism

5 Clostridium botulinum Organism exists in the natural environment as resistant spores in soil, sediment, mud, water. Under the right conditions (anaerobic) spores germinate, multiply and produce toxin Botulism Neurotoxin or BoNT can also be produced by rare strains of C. butyricum and C. baratii Gram positive rod Strictly anaerobe Six antigenically distinct neurotoxins A to G Types A, B, E and F associated with human disease, Types C and D animal disease, G no disease 5Foodborne botulism

6 Four distinct groups of organisms by phenotypic characteristics and DNA homology – human disease groups I, II 6Foodborne botulism

7 Forms of botulism: Foodborne botulism Infant botulism (main form of botulism at present in the UK) Wound botulism Accidental or deliberate release 7Foodborne botulism

8 Intoxication by ingestion of preformed toxin in food where the organism has grown 8Foodborne botulism

9 Infant botulism Toxico infection By ingestion of spores which germinate, multiply and produce toxin in the gut: gut colonisation by the organism Usually occurs in infants <1 year 9Foodborne botulism

10 Wound botulism Wound infection where the bacterium multiplies under anaerobic conditions and produces toxin Exclusive to illegal injection of drugs in the UK but reported in other patient groups elsewhere 10Foodborne botulism

11 Accidental/ deliberate release Cosmetic or therapeutic Bioterrorism – C. botulinum is a schedule 5 organism 11Foodborne botulism

12 Mechanism of action of the botulism neurotoxin 12Foodborne botulism

13 Symptoms A rapidly progressive descending symmetrical paralysis Foodborne/ wound botulism Possible D and V Diplopia dysphagia or dysarthria dry mouth Hypotension Urinary retention, or constipation. Respiratory failure, Cardiac arrest Diminished or absent deep tendon reflexes 13Foodborne botulism Infant Botulism Less specific: Constipation, irritability followed by Lethargy Poor feeding Poor sucking Drooling Hypotonia General weakness not usually present: elevated blood pressure ; fever; altered mental state; altered sensation;

14 Differential diagnosis: 14Foodborne botulism Myasthenia gravis: Tensilon test positive Guillain-Barre syndrome: Ascending paralysis, CSF protein elevated Miller-Fisher Syndrome Descending paralysis Presence of anti-ganglioside antibodies: CSF protein elevated.

15 Laboratory confirmation of botulism Botulism is a Clinical Diagnosis 15Foodborne botulism Detection of toxin Food, serum, faeces, rectal wash M.B.A. Detection of toxin genes A,B,E, F Food, faeces, rectal wash, pus, tissue Real time PCR Culture and isolation of C. botulinum Food, faeces, rectal wash out, wound tissue, pus, environmental samples Detection of the organism by:

16 Specimens to send to the reference laboratory (Colindale) Foodborne botulism: Toxin detection by MBA: Serum (2-10ml) NOT haemolysed – NOT plasma Stool and others (vomitus, gastric contents, intestinal contents) Food frozen except for tins and jars Detection of the organism by toxin gene detection (PCR) and culture: Stool in anaerobic broth (ex: CMB – Robinson – FAB) Food Others – vomitus, gastric contents…in anaerobic broth 16Foodborne botulism

17 Specimens to send to the reference laboratory (Colindale) Infant botulism Detection of the organism by toxin gene detection (PCR) and culture: Stool or rectal wash out in anaerobic broth Food (honey) Dust and environment samples (water sediment – pet food) Toxin detection: Stool Rarely: serum 17Foodborne botulism

18 Wound botulism Toxin detection: Serum (2-10ml) Detection of the organism by toxin gene detection (PCR) and culture: Pus, debrided tissue in anaerobic broth Heroin 18Foodborne botulism Specimens to send to the reference laboratory (colindale)

19 Timing of specimens is important Serum: within 2 days of onset of symptoms Neurotoxin detected in serum and faeces >50% within 1 day of onset <25% of cases after 3 days Faeces: within a week of onset: C. botulinum detected in faeces >70% within 2 days 40% after 10 days 19Foodborne botulism Immunity to botulism does not develop, even with severe disease – repeated occurrence of botulism has been reported.

20 Foodborne botulism in the UK and Ireland Foodborne botulism

21 Foodborne botulism in the UK and Ireland, Foodborne botulism

22 Foodborne botulism July Olives 14 th July: A 46 year old female Oxfordshire resident has a lunch/dinner party at friends. 15 th July: she developed mild symptoms of blurred vision, dry mouth. 18 th July: she goes to her GP who takes a blood specimen. 19 th July: Admitted to hospital, seen by neurologist on the 20 th when the patient developed poor swallowing – the neurologist suggests botulism as diagnosis. 22Foodborne botulism The patient is monitored – not ventilated Cranial bilateral bulbar palsy Proximal upper limb weakness No sensory loss

23 Foodborne botulism July Olives 1 week after onset of symptoms… 22 nd July: Hospital contacts duty doctor in Colindale for obtaining antitoxins. 23 rd July: Reference laboratory contacted by duty doctor. Follow a series of phone calls between Reference laboratory and the hospital – consultant micro, the ITU and Thames Valley HPU. 23Foodborne botulism

24 Foodborne botulism July Olives The patient ate at the party. She was the only one with symptoms and the only one to have eaten olives at the party. Another guest spat out an olive saying it did not taste right. The olives were then put aside to be disposed of, but stay on a table at room temperature while the hosts went for a week abroad on holiday. When the host came back, they learned their friend was ill, called the hospital and suggested the olives was the cause of illness. 24Foodborne botulism

25 Foodborne botulism July Olives 23 rd July, at 17:20 The olives arrived at Colindale. 25Foodborne botulism The original jar with olives – pH 6.65 A sterile container with olives (the original was leaking) A CMB with a rectal swab DOC – 7 days after onset of symptoms Serum DOC taken by GP – 3 days after onset of symptoms Serum DOC – pre-IG treatment – 7 days after onset of symptoms

26 Foodborne botulism July Olives 24 th July, The olives: 10:30 - PCR results – POSITIVE for neurotoxin gene B 11:30 – MBA results – POSITIVE for typical symptoms of botulism (neutralisation tests were performed the next day and detected neurotoxin B) The clinical specimens: Rectal swab - negative Serum – negative 26Foodborne botulism FSA alerted National recall of olives and warming not to eat from this batch

27 Foodborne botulism July Olives 25 th July, 10 days after onset of symptoms, a faecal specimen is collected from the patient, now at home. 27 th July, Friday: A stool specimen arrived at Colindale. It can not be tested on receipt because it is not in a broth. Broth inoculated with the stool specimen – incubated overnight 30 th July Monday: PCR results – POSITIVE for neurotoxin gene B 27Foodborne botulism

28 Foodborne botulism - Scotland th November: A 5 year old child developed diplopia and dysphagia – taken to GP who sent the child back home. During the night, child became very unwell, unable to swallow, drooling, taken to GP again then to hospital in Sterling. Child had to be ventilated and was taken to Children’s Hospital PICU in Glasgow. On same day in the afternoon, the 7 year old sister developed blurred vision. 9 th November: the 7 year old sister developed sore throat – admitted to Sterling Hospital and when deteriorating was taken to PICU in Glasgow and ventilated. 28Foodborne botulism NO D&V - no fever – CT scan and MRI normal – LP normal Neurology and immunology team: botulism as the most likely diagnosis Children received antitoxin and stabilised Colindale alerted

29 Foodborne botulism – Scotland th November: first teleconference Children received antitoxin and stabilised The parents and the 3 year old sibling have no symptoms. Food history: try to identify plausible foods eaten within 36h from onset of symptoms, by the children only. Olives in jar (lots of discussion about olives because of recent botulism outbreak in Helsinki and France) 29Foodborne botulism

30 Foodborne botulism – Scotland 2011 Olives in jar Carrots Pitta bread Humus Curry sauce in jar with chicken: dad said ‘ smell funny’ but gave it to the children Hot dogs Cheese Chicken nuggets Sun dried tomatoes in oil Rice Potatoes Peppers Vanilla yoghurt Salad Smoothies biscuits Cereal Banana milkshake Frozen raspberries honey 30Foodborne botulism

31 Foodborne botulism – Scotland 2011 INOUT Olivesin jar Grilled chicken Curry Sauce in jar Homemade biscuits Yoghurt Carrots Honey Raspberries Pitta Bread Pasta, chicken, tomato sauce Humus broccoli Sundried tomatoes Cereal Banana Milkshake 31Foodborne botulism

32 Foodborne botulism – Scotland 2011 Food itemSpecimen information Toxin detection by MBA C. botulinum detection by PCR Comments on PCR results M&S wholemeal PittasFrom rubbish binNot detectedC. botulinum A Spores only detected. Remnant of Korma sauce +Chicken From wheelie binToxin A detectedC. botulinum A Vegetative cells and spores detected Lid from the consumed korma sauce jar From rubbish wheelie binToxin A detectedC. botulinum A Vegetative cells and spores detected Empty jar of consumed korma sauce From recycling binToxin A detectedC. botulinum A Vegetative cells and spores detected Korma sauce jar Opened but not consumed; From dry good cupboard Not detectedNegative Empty container of olives From wheelie binNot detectedNegative Oil from sun-dried tomatoes From fridgeNot detectedNegative HoumousFrom fridgeNot detectedNegative 32Foodborne botulism FSA issued National product recall

33 33Foodborne botulism Patient specimen information Date of collection Toxin detection by MBA C. botulinum detection by PCR BoySerum Not performed/ haemolysedNA boyBlood Not performed/ haemolysedNA BoyBlood Not performed/ EDTA treatedNA GirlSerum Toxin detected - Classic symptoms of botulism observed, insufficient serum for confirmatory neutralisation test NA BoySerum NA GirlBlood Not performed/ haemolysedNA GirlBlood Not performed/ EDTA treatedNA Girl Rectal washout in Anaerobic broth Not performedC. botulinum A Boy Rectal washout in Anaerobic broth Not performedC. botulinum A BoyRectal washout Not detectedC. botulinum A BoyGastric aspirate Not detectedNegative GirlGastric aspirate Not detectedNegative GirlRectal washout Not detectedNegative

34 Foodborne botulism – Scotland th November: 3 rd sibling, a 3 year old girl, admitted to hospital after choking on food – gagged on food collapsed a few time and eyes were droopy. Taken to A&E with ptosis – then discharged the next day ! 17 th November: Choked on food again – antitoxin given 23 rd November: Stool specimen for 3 year old PCR Positive for neurotoxin gene A 34Foodborne botulism

35 How to prevent foodborne botulism C. botulinum has to grow to produce toxin. The main limiting factors for growth of C. botulinum in foods are: 1.temperature, (optimum growth is 35°C or 25°C) 2.pH, below water activity, ( min a w of ~0.94 is needed for growth) 10% NaCl 4.redox potential, presence of oxygen 5.food preservatives, (nitrite, sorbic acid, polyphosphates..) 6.competing microorganisms, lactic acid bacteria, intestinal microflora. 7.‘Botulinum cook’: pressure cooker 121°C for 3 minutes 35Foodborne botulism

36 Who to speak to??? Clinical diagnosis: Consult neurologist and local ID Physician Botulism duty doctor protocol (HPA website) Microbiology confirmation and Guidelines and advice on specimens, availability and interpretation of results: Reference laboratory Colindale GBRU User Manual (LGP user manual HPA website) Dr Corinne Amar or Dr Kathie Grant Availability of antitoxin: Duty doctor in Colindale BabyBIG: Infant Botulism Treatment and Prevention Programme, California, USA. 36Foodborne botulism

37 Thank You, 37Foodborne botulism


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