1b Gastrointestinal Infections Flashcards

1
Q

Rapid onset watery diarrhoea for an elderly hospital patient with high CRP, inflammatory markers, creatinine and albumin. What is the most likely diagnosis?

A

C. Diff infection

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2
Q

What investigations should be done for a suspected C. Diff infection?

A

STOOL SAMPLE FOR C.DIFFICILE TOXIN
STOOL CULTURE
IMAGING AXR

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3
Q

What is the management plan for a patient with suspected C. Diff infection?

A
  1. Isolate the patient - move them to a side room
  2. Discontinue the antibiotics which are causing the C. Diff infection
  3. Management of diarrhoea, fluids and nutrition
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4
Q

What are the three levels of severity with C. Diff infections?

A
  1. Non-severe (WCC<15, Creat <150)
  2. Severe (WCC > 15, Creat >150)
  3. Fulminant Colitis - Hypotension or shock, ileus, toxic megacolon
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5
Q

What might patients experience if they have Fulminant Colitis?

A

Hypotension, Shock, ileus, Toxic megacolon

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6
Q

What is toxic megacolon?

A

When the colon enlarges as a result of C. Diff infection - can be seen on imaging

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7
Q

What is the treatment for severe C. Diff infection / Fulminant Colitis?

A

Antibiotics, supportive care, early surgical consultation

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8
Q

What is the treatment for non-severe C. Diff infection?

A

Antibiotic therapy with oral vancomycin, metronidazole

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9
Q

What is the treatment for fulminant colitis with toxic megacolon?

A

Medical therapy - antibiotics and supportive management

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10
Q

What are the indications for surgery with fulminant colitis with toxic megacolon?

A

Colonic perforation
Necrosis or ischaemia
Clinical signs of peritonitis
End - organ failure

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11
Q

What is pseudomembranous colitis?

A

Pseudomembranous colitis isinflammation (swelling, irritation) of the large intestine.

Often associated with C Diff infection
Manifestation of severe colitis disease
Characteristic white-yellow plaques form pseudomembranes on the mucosa

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12
Q

26 Female with long history of loose motions and PR bleeding and minimal tenderness in the left iliac fossa. Increased WCC and CRP indicating inflammatory process. What is most likely diagnosis?

A

Ulcerative colitis

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13
Q

What histology is seen in UC?

A

Left sided inflammatory change
Chronic inflammation with no granulomas

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14
Q

What is the difference between UC and Crohns?

A

UC: Limited to the mucosa, limited to the colon, pseudopolyps, bloody diarrhoea with mucus

Crohns: All layers of the gut wall, Entire GI Tract, Patchy lesions, Cobblestone appearance, non-caseating granulomas, bloody diarrhoea

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15
Q

What are the management options for UC?

A

Steroids
5-ASA
Immunosuppressants = Methotrexate, Aziothioprine
Biologics

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16
Q

What are the different severity classifications for UC?

A

MILD - 4 x BMs, no systemic involvement and normal inflammatory markers
MODERATE - >4BM’s a day, mild symptoms, no weight loss
SEVERE - > 6BM’s a day, severe symptoms, system toxicity, severe anaemia, increased CRP and ESR, weight loss

17
Q

What medication is used to manage remission acutely for UC?

A

Prednisolone, if that still doesnt work then Aziothioprine, if that still not working = Infliximab

18
Q

What are some causes of non-infective diarrhoea?

A

Antibiotic side effects
IBD
IBS
Colitis
Ischaemic Colitis

19
Q

List the four main bacteria which can cause diarrhoea?

A
  • Clostridium difficile
  • Klebsiella oxytoca
  • Clostridium perfringens
  • Salmonella spp
20
Q

What are the two most common antibiotics to cause C.diff infection?

A

Co-amoxiclav

Ciproflaxin

21
Q

List non-infectious causes of diarrhoea.

A

Antibiotics side effect

Post-infectious irritable bowel syndrome

Inflammatory bowel disease

Microscopic colitis

Ischaemic colitis

Coeliac disease

22
Q

When would you offer a faecal microbiota transplantation?

A

Only for recurrent infection or resistant or prolonged infection

Or if Abx therapy failed

23
Q

What is meant by Abdominal Compartment syndrome?

A

Significant abdominal distension and no space for fluid to expand so pressure on organs compromising blood supply leading to organ failure

24
Q

How does Pseudomembranous colitis present on endoscopy?

A

Characteristic yellow-white plaques that form pseudomembranes on the mucosa

25
Q

What are some of the endoscopic findings in Ulcerative colitis?

A

Continuous

Left-sided colitis

No granulomas

26
Q

Why can steroids not be used as long-term management?

A

Lose effect after a while

Usually given acutely or short term to induce remission

E.g. Prednisolone

27
Q

What diseases can Azathioprine cause reactivation of? And How can you reduce the risk of this happening?

A

HepB/C/HIV

Chicken pox

Blood tests to check risk of reactivation of these diseases

Ensure vaccinations have been given

28
Q

What are the side effects of infliximab?

A

Anti-TNF-Alpha = Infliximab

Autoimmunity, immunogenicity

Demyelination disease

Infection

Bone marrow suppression

Infusion reactions, injection-site reactions

Congestive heart failure

Hepatotoxicity

Malignancy/Lymphoma