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Questions and Answers
Which group is not considered a risk group related to personal hygiene according to the given content?
Which group is not considered a risk group related to personal hygiene according to the given content?
It is necessary to deliver a stool sample for MC&S testing within 24 hours.
It is necessary to deliver a stool sample for MC&S testing within 24 hours.
True (A)
What does PCR stand for in the context of stool sample testing?
What does PCR stand for in the context of stool sample testing?
Polymerase Chain Reaction
Campylobacter is the most common bacterial cause of human ______ in the world.
Campylobacter is the most common bacterial cause of human ______ in the world.
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Match the following testing methods with their characteristics:
Match the following testing methods with their characteristics:
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Which of the following are symptoms of Shigella infection?
Which of the following are symptoms of Shigella infection?
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The main reservoir for Shiga toxin-producing Escherichia coli (STEC) is humans.
The main reservoir for Shiga toxin-producing Escherichia coli (STEC) is humans.
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Name one type of illness caused by evil E.coli (STEC).
Name one type of illness caused by evil E.coli (STEC).
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For Shigella infections, antibiotic treatment and microbiological clearance require at least one negative ______ sample.
For Shigella infections, antibiotic treatment and microbiological clearance require at least one negative ______ sample.
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Match the following terms with their descriptions:
Match the following terms with their descriptions:
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Which of the following is a common source of Campylobacter infection?
Which of the following is a common source of Campylobacter infection?
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Cryptosporidiosis is primarily spread through undercooked meat.
Cryptosporidiosis is primarily spread through undercooked meat.
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Which type of fever is associated with high fever, abdominal pain, and headache, and can be life-threatening?
Which type of fever is associated with high fever, abdominal pain, and headache, and can be life-threatening?
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The parasite responsible for cryptosporidiosis is called ______.
The parasite responsible for cryptosporidiosis is called ______.
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Match the gastrointestinal infection with its typical duration:
Match the gastrointestinal infection with its typical duration:
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Which condition is highly contagious and often requires microbiological clearance in risk groups?
Which condition is highly contagious and often requires microbiological clearance in risk groups?
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Person-to-person transmission is a common route for spreading Campylobacter.
Person-to-person transmission is a common route for spreading Campylobacter.
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Swimming pools are a common source of outbreaks for both Cryptosporidiosis and ______.
Swimming pools are a common source of outbreaks for both Cryptosporidiosis and ______.
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Which group is most likely involved in food safety regulations?
Which group is most likely involved in food safety regulations?
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Campylobacter is known for causing respiratory infections.
Campylobacter is known for causing respiratory infections.
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Name the method that identifies genetic material and can indicate a more virulent infection.
Name the method that identifies genetic material and can indicate a more virulent infection.
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When collecting a stool sample, ensure no contamination with ______.
When collecting a stool sample, ensure no contamination with ______.
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Match the risk groups with their associated roles:
Match the risk groups with their associated roles:
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Which of the following is NOT a mode of transmission for Shigella infections?
Which of the following is NOT a mode of transmission for Shigella infections?
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The main reservoir for STEC is aquatic mammals.
The main reservoir for STEC is aquatic mammals.
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What does HUS stand for in the context of STEC infections?
What does HUS stand for in the context of STEC infections?
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Evil E.coli, also known as STEC, can cause ______ or even death.
Evil E.coli, also known as STEC, can cause ______ or even death.
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Match the following Shigella species with their general illness severity:
Match the following Shigella species with their general illness severity:
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Which of the following is a key difference between Campylobacter and Cryptosporidiosis infections?
Which of the following is a key difference between Campylobacter and Cryptosporidiosis infections?
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Giardiasis is resistant to chlorination due to the excreted cysts.
Giardiasis is resistant to chlorination due to the excreted cysts.
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What is the primary bacterial cause of enteric fever?
What is the primary bacterial cause of enteric fever?
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Hepatitis A severity increases with ______.
Hepatitis A severity increases with ______.
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Match the gastrointestinal infection with its typical symptom or characteristic:
Match the gastrointestinal infection with its typical symptom or characteristic:
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What is a common source of infection for both Giardiasis and Cryptosporidiosis?
What is a common source of infection for both Giardiasis and Cryptosporidiosis?
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Enteric fever is predominantly acquired within the UK.
Enteric fever is predominantly acquired within the UK.
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Name one symptom that Campylobacter and Cryptosporidiosis infections have in common.
Name one symptom that Campylobacter and Cryptosporidiosis infections have in common.
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Flashcards
Bristol Stool Chart
Bristol Stool Chart
A clinical tool for categorizing stool consistency and form.
Risk Groups
Risk Groups
Categories of individuals requiring special consideration in hygiene and handling.
Stool Sample Collection
Stool Sample Collection
Procedure for collecting stool in a sterile way for lab analysis.
MC&S Test
MC&S Test
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PCR vs Culture
PCR vs Culture
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Shigella
Shigella
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STEC
STEC
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HUS
HUS
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Good E. coli
Good E. coli
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Naughty E. coli
Naughty E. coli
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Campylobacter
Campylobacter
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Traveller’s diarrhoea
Traveller’s diarrhoea
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Cryptosporidiosis
Cryptosporidiosis
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Enteric fever
Enteric fever
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Giardiasis
Giardiasis
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Hepatitis A
Hepatitis A
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Symptoms of Cryptosporidiosis
Symptoms of Cryptosporidiosis
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Antibiotics for Giardiasis
Antibiotics for Giardiasis
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Stool Sample Collection Steps
Stool Sample Collection Steps
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Culture Test
Culture Test
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PCR Test
PCR Test
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Shigella sonnei
Shigella sonnei
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HUS (Haemolytic Uraemic Syndrome)
HUS (Haemolytic Uraemic Syndrome)
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Main reservoir for STEC
Main reservoir for STEC
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Infectious dose for STEC
Infectious dose for STEC
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Symptoms of Shigella infection
Symptoms of Shigella infection
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Common causes of GI infections
Common causes of GI infections
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Symptoms of Campylobacter infection
Symptoms of Campylobacter infection
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Cryptosporidiosis transmission
Cryptosporidiosis transmission
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Enteric fever pathogens
Enteric fever pathogens
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Giardiasis transmission
Giardiasis transmission
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Treatment for enteric fever
Treatment for enteric fever
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Study Notes
Bristol Stool Chart
- A chart categorizing stool consistency, ranging from separate hard lumps to entirely liquid.
- Type 1: Separate hard lumps, like nuts (hard to pass).
- Type 2: Sausage-shaped but lumpy.
- Type 3: Like a sausage but with cracks on the surface.
- Type 4: Like a sausage or snake, smooth and soft.
- Type 5: Soft blobs with clear-cut edges.
- Type 6: Fluffy pieces with ragged edges, a mushy poo.
- Type 7: Watery, no solid pieces. Entirely liquid.
Risk Groups
- A: Doubtful personal hygiene; unsatisfactory facilities.
- B: Children aged five years old or under.
- C: Food handlers.
- D: Clinical, social care or nursery staff.
- Note: Different management strategies exist for these risk groups, as outlined in relevant guidelines.
Stool Sample Collection
- Collect stool using a clean, sterile container.
- Seal the container securely and label it with details.
- Deliver it to the lab as soon as possible (usually within 24 hours).
- Avoid contamination with urine or water.
MC&S: Culture
- Microscopy, Culture, and Sensitivity (MC&S) involves collecting a sample (stool, urine, or swab).
- Use sterile techniques to place the sample in an appropriate transport medium.
- Send it to the lab promptly for accurate microbial analysis.
PCR vs Culture
- Culture: Whole organism analysis; growth indicates active infection.
- PCR: Genetic material analysis; identifies active infection / recovery state, presence of toxins, and potential for a more virulent infection.
Campylobacter (1)
- Most common bacterial cause of human gastroenteritis globally.
- One of the most common causes of traveller's diarrhoea in the UK.
- Sources: Undercooked meats, contaminated water, animal contact.
- Low risk of person-to-person spread.
Campylobacter (2)
- Generally mild illness, but can be fatal in vulnerable groups (very young, elderly, immunosuppressed).
- Symptoms include diarrhoea, abdominal pain, fever, and sometimes bloody diarrhoea/vomiting.
- Illness lasts 2-3 days.
- No active public health management of sporadic cases.
- Animal health authorities involved if clusters are observed (may indicate poultry issues).
Cryptosporidiosis
- A parasitic infection caused by Cryptosporidium.
- Transmission through contact with animals, person-to-person, and contaminated water (including public water supplies and swimming pools).
- Symptoms include profuse watery diarrhoea, abdominal cramps, vomiting, and fever.
- Generally lasts 10-14 days in healthy individuals.
- Can be life-threatening for immunocompromised individuals, resulting in chronic diarrhoea.
Cryptosporidium: Surveillance
- Weekly surveillance is conducted.
- Laboratory data is collected and analysed.
- EHO (Environmental Health Officer) questionnaires are used to gather information.
- Water boundaries are monitored for potential outbreak locations.
Enteric fever (typhoid, paratyphoid)
- Caused by Salmonella typhi and paratyphi.
- Serious, potentially life-threatening illness.
- Symptoms: High fever, abdominal pain, headache, constipation or diarrhoea.
- Treatment: Antibiotics.
- Illness typically lasts several weeks.
- Commonly acquired abroad (from contaminated food/water).
- Highly contagious.
- Travel vaccines available for typhoid, but not always effective for paratyphoid.
- Microbiological clearance criteria: Three negative stool samples (48 hours apart), taken one week after starting antibiotics.
Giardiasis
- Caused by Giardia lamblia.
- Person-to-person spread, commonly waterborne, or from animal contact.
- Often linked to outbreaks associated with infected food handlers or contaminated water sources.
- Symptoms: Diarrhoea, greasy stools, abdominal pain, flatulence.
- Lasts up to 6 weeks.
- Treatment: Antibiotics.
- Giardia cysts (excreted in stool) are resistant to chlorine.
- Avoid swimming for 2 weeks after recovery.
Hepatitis A
- Spread via person-to-person contact, contaminated food or water (also associated with foreign travel).
- Sexual contact, and injecting drug use can also spread the infection.
- Symptom severity varies with age: 90% of those younger than 5 show no or mild symptoms.
- Symptoms can include jaundice, fever, anorexia (loss of appetite), weight loss, and dark urine/pale stools.
- Prevention and control: Vaccines are available, as well as immunoglobulin for high-risk individuals.
- Public health response includes mass vaccination in school outbreaks.
Listeriosis
- A bacterial infection requiring pathogen identification, source investigation, transmission analysis, symptom evaluation, and pregnancy-specific precautions.
Pregnant Women & Animals
- Pregnant women should avoid contact with animals giving birth (especially ewes, cows, and goats) and their newborns, afterbirths, and contaminated bedding.
- This includes handling materials potentially contaminated with birthing fluids.
Norovirus
- Highly contagious virus spread through person-to-person, inhalation, ingestion, and contaminated environments.
- Symptoms include sudden onset nausea, projectile vomiting, watery diarrhoea.
- Short incubation period.
- Outbreak management involves appropriate guidelines (PPE, cleaning procedures).
- Common during winter months.
Salmonella
- Spread through contaminated food or water, or person-to-person contact.
- The bacteria can be found in undercooked meats, raw eggs, contaminated milk products, and salads.
- Symptoms include watery diarrhoea, abdominal pain, fever, and vomiting.
- Illness lasts 4-7 days.
- There are several hundred serotypes, and whole-genome sequencing (WGS) can be used to track the source of infection outbreaks.
Shigella (bacterial dysentery)
- Bacteria causing diarrhoea (ranging from watery to bloody), fever, and abdominal cramps.
- Four main species: Shigella sonnei (mild illness), boydii, dysenteriae, and flexneri.
- Shigella infection can last from a day to 2 weeks.
- Spread is mainly person-to-person, environmental, sexual contact, and among those who have travelled using contaminated food or water.
- Treatment is with antibiotics.
- Microbiological cure involves one negative stool sample.
Shiga Toxin Producing Escherichia coli (STEC)
- Bacteria causing mild gastroenteritis to severe bloody diarrhoea, haemolytic uraemic syndrome (HUS), and death, mostly in children.
- Common in cattle.
- Can be transmitted by consumption of contaminated food or water, or by contact with animal faeces.
- Person-to-person transmission is rare, but more typical in young children.
Escherichia coli (The Gajraj Classification)
- E. coli broadly classed into "good," "naughty," and "evil" types.
- "Good" strains are part of gut flora but can cause UTIs.
- "Naughty" strains do not produce Shiga toxin and cause relatively mild diarrhoea (usually self-limiting).
- "Evil" strains (STEC) produce Shiga toxin and cause severe diarrhoea, leading to potentially life-threatening complications such as HUS/death. Specific serotypes are noted, each with a number (e.g., 0157).
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Description
Test your knowledge of the Bristol Stool Chart and the proper procedures for stool sample collection. Understand the different types of stool and the associated risk groups for sample management. This quiz is essential for health professionals and students alike.