Locating the source of Sepsis

Clinical Epidemiology and Bedside Identification of Sepsis Sources in the United Kingdom: A Comprehensive Analysis of the Expanded LUCAS Framework and NHS Presentation Trends

The clinical management of sepsis within the United Kingdom’s National Health Service (NHS) has undergone a paradigmatic shift over the last decade, transitioning from a reactive physiological response model to a proactive, source-centric diagnostic strategy. Sepsis is defined as life-threatening organ dysfunction caused by a dysregulated host response to infection, and it remains a primary driver of morbidity and mortality across all levels of secondary care.[1] Within the high-pressure environment of the Emergency Department (ED), the ability to rapidly identify the infectious focus is as critical as the initiation of early fluid resuscitation and antimicrobial therapy. The LUCAS mnemonic—traditionally Lungs, Urine, CNS, Abdomen, and Skin, but expanded here to include Spine, Septic joints, Septic emboli, and Endocarditis—serves as an essential cognitive aid for clinicians to systematically survey the most prevalent and high-risk anatomical origins of infection in a population increasingly characterized by frailty, multi-morbidity, and advanced age.[2, 3, 4]

The Macro-Epidemiological Context of Sepsis in the United Kingdom

In the United Kingdom, sepsis accounts for at least 245,000 cases annually, resulting in approximately 48,000 to 50,000 deaths.[5, 6] The incidence of sepsis-coded hospital admissions in England has increased nearly 7.5-fold since the late 1990s, rising from 27.9 per 100,000 in 1998 to 210.4 per 100,000 by 2023.[1] While this trajectory is influenced by improved clinical recognition and more rigorous coding practices—such as the transition to Sepsis-3 criteria—it also reflects genuine demographic shifts. Over 52% of sepsis cases in the UK now occur in patients aged 75 and older, a significant increase from 32.4% two decades ago.[1] This demographic evolution complicates source identification, as elderly and frail patients often present with "vague" or non-specific symptoms, which are independently associated with higher in-hospital mortality.[7, 8, 9]

Epidemiological Marker	Value / Trend in UK NHS	Source(s)
Annual Sepsis Episodes	200,000 – 250,000 (confirmed)	[5, 6]
Mortality Rate (All Sepsis)	20% – 24%	[5, 6, 10]
Mortality Rate (Septic Shock)	40% – 60%	[11, 12, 13]
ED Attendance Prevalence	~5.0% of emergency admissions	[6]
Economic Burden	£1.5 – £2.0 billion annual NHS cost	[6]
Aging Population Impact	>50% of cases in patients over 75 years	[1, 14]

The financial impact on the NHS is profound, with sepsis care consuming approximately 1% of the total NHS budget.[6] Furthermore, the wider economic cost, including lost productivity and long-term morbidity, is estimated between £11 billion and £15.6 billion annually.[6] These statistics necessitate a diagnostic approach that balances speed with anatomical precision to ensure that the "Sepsis Six" bundle—which includes taking blood cultures and identifying the source—is delivered effectively within the "Golden Hour".[14, 15]

Bedside Aids and the Mnemonic Hierarchy

Mnemonics function as cognitive scaffolding in acute care settings where the volume of information can overwhelm the clinician's decision-making capacity. The "SEPSIS" mnemonic (Slurred speech, Extreme shivering, Passing no urine, Severe breathlessness, Impending doom, Skin mottled) was widely promoted by the World Sepsis Day committee to improve public and clinical recognition.[7, 9, 16] However, clinical validation suggests that while symptoms like slurred speech (22.2%) and severe breathlessness (41.4%) are common, signs like "skin mottling" and "impending doom" are reported in only 1.1% of patients, potentially leading to missed diagnoses in immunocompromised or intra-abdominal sepsis cases.[7, 8]

The LUCAS mnemonic provides a more robust anatomical survey compared to symptom-based aids. It focuses on identifying the where rather than just the what, which is essential for directing diagnostic imaging and surgical consultation as mandated by NICE guideline NG253 [17]].

Comparison of Clinical Sepsis Mnemonics and Bedside Aids

Aid	Primary Focus	Clinical Utility in ED	Source(s)
LUCAS	Source Identification	Systematic anatomical survey for infectious focus.	[2, 3]
NEWS2	Physiological Risk	National standard for identifying clinical deterioration.	[18]
qSOFA (HAT)	Rapid Screening	Identifies high-risk patients via Hypotension, Altered mental status, and Tachypnea.	[3, 6]
SHOCK	Severity Stratification	Focuses on Systolic BP, Hypoperfusion, Organ dysfunction, Clinical signs, and Known source.	[19]
LAVOE	Initial Management	Guide for Liquids, Antibiotics, Vasopressors, Oxygen, and Enoxaparin (Maternal focus).	[20]

L - Lungs: Respiratory Tract Infections

Respiratory tract infections are the primary source of sepsis in the NHS, identified in approximately 38% to 45% of adult sepsis cases presenting to the ED [10, 11, 21, 22]]. The clinical spectrum ranges from community-acquired pneumonia (CAP) to hospital-acquired pneumonia (HAP) and aspiration pneumonia, which is particularly prevalent in patients with neurological deficits or advanced frailty.[15, 23]

Clinical Presentation and Physiological Impact

Tachypnea is often the earliest sign of a lung source, defined in the qSOFA criteria as a respiratory rate of 22 breaths per minute or higher.[3] Patients frequently present with "Severe breathlessness," pleuritic chest pain, and new-onset hypoxemia.[7, 15, 16] In the UK, pneumonia remains a leading cause of maternal sepsis, accounting for 44% of such cases in some cohorts.[24] The pathophysiology involves the accumulation of inflammatory exudate within the alveolar spaces, which impairs gas exchange and leads to systemic hypoxia, further exacerbating the metabolic strain of sepsis.

Prevalence and Outcomes

Data from 181 adult ICUs in England show that the proportion of sepsis admissions originating from the respiratory tract increased from 40.1% in 2000 to 45.1% in 2012.[10] Respiratory sepsis is associated with the highest unadjusted hospital mortality among the major sources, recorded at 43.0%.[10] This high mortality is partly driven by the rapid progression to Acute Respiratory Distress Syndrome (ARDS) and the increasing prevalence of multi-drug resistant Gram-negative bacteria such as Klebsiella pneumoniae, which surveillance data indicates has seen an increase in resistance to first-line agents like piperacillin-tazobactam.[14, 25]

Respiratory Parameter	Clinical Threshold / Value	Context
Tachypnea (qSOFA)	$\ge 22$ breaths/min	Early indicator of organ dysfunction
Hypoxemia (Red Flag)	$Sp{O}_2<90\%$ in air	Critical marker of respiratory failure
Mortality (Respiratory Sepsis)	43.0% (unadjusted)	Highest mortality among primary sources
Pathogen Frequency	S. pneumoniae, S. aureus, Klebsiella	K. pneumoniae shows rising AMR in UK

U - Urine: Urogenital Tract Infections

Urogenital infections represent the second most common source of sepsis in UK ED patients, contributing to 17.3% to 25.4% of total presentations [10, 11, 21, 22]]. Sepsis of a urinary origin, often termed "urosepsis," is frequently associated with anatomical or functional abnormalities of the urinary tract, such as benign prostatic hyperplasia (BPH) in men or the presence of long-term indwelling catheters.[23, 26, 27]

Clinical Indicators and Diagnostic Challenges

Clinical signs include dysuria, flank pain, and suprapubic tenderness. However, in the elderly, "Passing no urine" or oliguria is a late and critical indicator of Acute Kidney Injury (AKI) secondary to sepsis.[7, 16, 19] The presence of "vague" symptoms such as confusion or lethargy is common in this population and can delay diagnosis if clinicians do not maintain a high index of suspicion.[8, 9, 26] NICE guidelines (NG253) mandate urine analysis as a primary investigation for all patients with suspected sepsis to expedite source identification [17]].

Mechanistic Insights: Obstructive Uropathy and POCUS

A significant subset of urosepsis cases in the ED involves obstructive uropathy, such as that caused by a 6-mm obstructing ureteral stone.[28] In these instances, the infected urine is sequestered under pressure, leading to the rapid translocation of bacteria and endotoxins into the systemic circulation. Point-of-care ultrasound (POCUS) has become an invaluable bedside aid in the NHS for identifying hydronephrosis, which directs the clinician toward urgent surgical or radiological intervention for source control, such as nephrostomy or ureteral stenting.[28, 29]

Despite its prevalence, urosepsis generally carries a more favorable prognosis compared to respiratory sepsis, with unadjusted hospital mortality rates of approximately 19.1%.[10] Escherichia coli remains the most frequently isolated pathogen, although the prevalence of Extended-Spectrum Beta-Lactamase (ESBL)-producing strains is a growing concern for empirical therapy choice.[11, 14, 25, 30]

C - CNS: Central Nervous System Infections

Central Nervous System (CNS) infections, including bacterial meningitis and encephalitis, are relatively rare sources of sepsis in the UK, accounting for 1.1% to 5.2% of presentations [10, 11, 21]]. However, they are characterized by extreme severity and a high risk of long-term neurological disability.[31, 32, 33]

Clinical Markers and the "Thinking Sepsis" Mandate

The primary clinical indicator for a CNS source is an "Altered level of consciousness," which is reflected in the Glasgow Coma Scale (GCS) and the Alert-Verbal-Pain-Unresponsive (AVPU) scale.[3, 15, 18] Sepsis-3 criteria (qSOFA) utilize a GCS $<15$ as a critical screening marker.[6, 15] Other indicators include severe headache, fever, and neck stiffness. In children, "weak or high-pitched cry" and "lethargy" are vital amber and red flags.[15, 16, 34]

CNS Indicator	Significance in Sepsis	Clinical Threshold
Altered Mentation	Major qSOFA component	GCS $<15$
Meningism	High specificity for meningitis	Stiff neck, Photophobia
Non-blanching Rash	Pathognomonic for Meningococcal sepsis	Urgent Antibiotics Required
Mortality (CNS Sepsis)	High morbidity/mortality risk	Variable by pathogen

Epidemiological Shifts in the UK

The incidence of meningococcal sepsis has significantly declined in England and Wales due to successful national vaccination campaigns.[1] Conversely, encephalitis remains a diagnostic challenge with a global incidence higher than that of bacterial meningitis in many high-income settings.[33] For clinicians in the ED, the decision to perform a lumbar puncture must be balanced against the need for stabilization, with NICE guidelines providing clear contraindications such as hemodynamic instability or clinical signs of raised intracranial pressure [17]].

A - Abdomen: Intra-Abdominal Sepsis

Intra-abdominal infections account for approximately 6.0% to 12.1% of sepsis cases in the UK, but they are disproportionately represented in patients who present with "vague" symptoms and those who are immunocompromised.[8, 9, 11, 21] Common sources include bowel perforation, biliary tract infections (cholecystitis/cholangitis), appendicitis, and abscesses.[3, 35, 36]

Clinical Presentation and Vague Symptoms

Abdominal sepsis is often difficult to localize on initial physical examination, especially in elderly patients who may not exhibit classical signs like guarding or rebound tenderness.[3, 26] A Thai study found that 38.5% of patients without any symptoms of the "SEPSIS" mnemonic were eventually diagnosed with an intra-abdominal infection.[7, 8] Clinical indicators that should trigger concern include persistent vomiting, abdominal distension, and jaundice.[16, 36, 37]

Source Control and Radiological Intervention

NICE guidelines emphasize that if no likely source of infection is identified after clinical examination, chest X-ray, and urine analysis, clinicians should proceed to imaging of the abdomen and pelvis [17]]. Source control is the cornerstone of management; the mortality rate for patients with intra-abdominal sepsis as the immediate cause of death is estimated at 19.2% in acute care cohorts.[38] The surgical team or interventional radiologist must be involved early to perform drainage or resection as soon as the patient is stabilized [17]]. Escherichia coli, Bacteroides species, and Enterococci are the most common pathogens involved, often requiring broad-spectrum cover for Gram-negative and anaerobic organisms.[1, 25]

S - Skin: Skin, Soft Tissue, and Wound Infections

Skin and soft tissue infections (SSTIs) are identified in 6.3% to 9.6% of sepsis presentations in the UK [10, 11, 21]]. This category includes cellulitis, necrotizing fasciitis, and infections secondary to chronic wounds or pressure ulcers.[39, 40]

The Role of Chronic Wounds and Pressure Ulcers

In the UK NHS setting, chronic wounds are a frequent and under-recognized source of sepsis. The prevalence of pressure ulcers in UK hospitals is approximately 18% to 20%.[39] Category III and IV pressure ulcers present a high risk, with Galpin et al. reporting mortality due to sepsis approaching 50% in this group.[39] For wound-related sepsis, clinicians must assess age, nutritional status, and immune function, as these comorbid factors significantly influence both the risk of infection and the body's ability to mount a response.

Cellulitis and Injection-Related Infections

Cellulitis is a common inflammatory condition involving the cutaneous tissues, typically caused by Group A Streptococci or Staphylococcus aureus.[39, 41] In certain urban populations, injection-related infections are a rising concern; one study in South London found that 53% of intravenous drug users had injected into the groin, where poor hygiene and repeated use of the same site contribute to deep abscesses and necrotizing fasciitis.[40, 41] Necrotizing fasciitis, though rare, carries a 30% mortality rate and requires immediate surgical debridement alongside antibiotics.[40]

Skin Source	Risk Factors in UK	Typical Organisms	Mortality Risk
Pressure Ulcers	Frailty, Immobility, Elderly	Poly-microbial	~50% (Cat III/IV)
Groin Abscesses	IV Drug Use	S. aureus, GAS	Moderate to High
Cellulitis	Diabetes, Vascular disease	Streptococci, Staphylococci	Variable
Necrotizing Fasciitis	Trauma, Surgery, Diabetes	S. pyogenes, S. aureus	~30%

Spine: Spondylodiscitis and Spinal Infections

While not traditionally included in simpler mnemonics, the "Spine" component of LUCAS is increasingly relevant in the UK due to rising incidence rates of spondylodiscitis (infection of the intervertebral disc and adjacent vertebrae).[4, 31]

Rising Incidence and Indolent Presentation

Between 2008 and 2011, the incidence of adult spontaneous spondylodiscitis in the North Staffordshire region was 3.67 per 100,000 per year, representing a 150% increase from the late 1990s [4]]. Spondylodiscitis is characterized by an indolent onset, with persistent back pain unrelieved by rest being the hallmark clinical indicator [4]]. However, approximately 20% of patients with this condition present with clinical sepsis on admission to the ED [4]].

Clinical Indicators and Risk Factors

Risk factors for spinal sepsis include age over 50 (present in 76% of cases), diabetes mellitus (15%), malignancy (11%), and immunosuppression (13%).[4, 31] MRI remains the diagnostic gold standard, often revealing destructive changes in the vertebrae.[4, 31] Methicillin-sensitive Staphylococcus aureus (MSSA) is the most common pathogen.[4, 31] Delays in diagnosis are common but can lead to devastating complications, including paralysis and systemic multi-organ failure.

Septic Joint: Septic Arthritis

Septic arthritis is an orthopedic emergency that must be excluded in any patient presenting with sepsis and a swollen joint. Its incidence in the general population is estimated at 2 to 12 cases per 100,000 annually, but it is significantly higher in those with pre-existing joint disease or compromised immune systems.[42, 43]

Presentation and Prevalence in the ED

Patients typically present with acute onset, severe joint pain, swelling, and impaired function.[43, 44] The knee is the most commonly affected joint (50% of cases), followed by the hip, shoulder, and ankle.[42, 45] In a study of native joint aspirations in the ED, the diagnosis of septic arthritis was confirmed in 13.0% of cases, with Staphylococcus aureus identified as the most frequent causative organism.[44, 46]

Clinical characteristics like fever are present in only 58% of cases, and serum leukocytosis in only 50–60%, necessitating a high index of clinical suspicion.[46] Mortality rates for septic arthritis range from 3% to 25%, with the risk increasing substantially in elderly and polyarticular cases.[42, 43]

Septic Emboli and Endocarditis: The Systemic Origins

The final components of the LUCAS framework—Septic Emboli and Endocarditis—address infections that are often systemic from the moment of presentation, carrying exceptionally high mortality and diagnostic difficulty.

Infective Endocarditis (IE) in the ED

Infective endocarditis is rare, with a yearly incidence of 3 to 10 per 100,000, yet its 1-year mortality remains at 30%—a figure higher than many cancers [47, 48]]. Presentation in the ED is often non-specific; classical signs like heart murmurs or petechiae are present in only a minority of patients [48]]. However, 87% of patients with IE in one ED cohort met the criteria for SIRS, and 67% arrived by ambulance, highlighting the acute nature of their illness [48]].

Septic Pulmonary Embolism (SPE)

Septic emboli typically arise from a primary focus of infection—such as endocarditis or infected intravenous catheters—and seed the pulmonary vasculature.[49, 50, 51] Clinical indicators include fever (79–85%), shortness of breath (73%), and cough.[49, 51] Radiologically, SPE is characterized by peripheral nodular lesions on CT, often with "feeding vessel" signs and cavitation.[49, 50, 51]

Condition	Primary Source in SPE	Mortality Rate
Septic Emboli	Skin/Soft tissue (44%), IE (27%), IV catheters (58%)	20% – 30%
Endocarditis	Heart Valves (Prosthetic/Native)	30% (1-year)

In the UK, the rise in intravenous drug use and the increased prevalence of indwelling medical devices have broadened the epidemiology of septic emboli to include more extrapulmonary, non-cardiac sources.[49]

The "Unknown Source" and Clinical Inertia

One of the most significant findings in sepsis epidemiology is the prevalence of the "Unknown Source." In various studies, between 6.3% and 13.4% of patients meeting Sepsis-3 criteria have no identifiable primary focus of infection at the time of ED evaluation.[11, 21, 22] Data from an Irish ED study, which reflects NHS parallels, found that patients with an unknown source were as numerous as those with a respiratory source (26.2% of severe sepsis cases).[12, 22]

An unknown infectious source is associated with a 2.17 adjusted odds ratio for in-hospital mortality.[7, 8] This underscores the critical importance of the LUCAS mnemonic; when initial investigations (Lungs and Urine) are negative, the systematic clinician must proceed to evaluate the "vague" areas: the Abdomen, Spine, Joints, and Endovascular system.

Physiological Monitoring and Stratification Tools

Beyond mnemonics, the NHS utilizes a standardized physiological framework to monitor and respond to sepsis.

NEWS2 and the National Standard

The National Early Warning Score 2 (NEWS2) is the primary bedside aid for identifying acutely ill patients in the UK.[18] It supplements clinical judgment by providing a rapid bedside score derived from vital signs. Patients with higher NEWS2 scores (especially $\ge 5$) require more urgent assessment and more rapid administration of intravenous antibiotics, ideally within one hour of diagnosis.[18]

Machine Learning and the Future of Sepsis Triage

The emergence of electronic health records (EHR) has enabled the development of machine learning models that can outperform traditional tools like qSOFA and SIRS in the ED.[52] A notable tool, also named "LUCAS" but functioning as a risk calculator rather than a source mnemonic, was developed to predict 60-day survival in COVID-19 patients using rapid routine blood tests (lymphocyte count, urea, CRP, age, sex) and chest X-ray image data.[53] This tool demonstrates how objective clinical parameters can be synthesized to provide valid mortality predictions and assist in resource-limited triaging.

Pathogen Prevalence and Antimicrobial Resistance Trends

The microbiological profile of sepsis in the UK is characterized by a high burden of Gram-negative pathogens and rising resistance to first-line agents.

Organism Distribution in Adult ICUs

According to financial year 2024 to 2025 surveillance data from English ICUs, Gram-negative bacteria accounted for 47.2% of bloodstream infections (BSIs), followed by Gram-positive bacteria at 41.4% and Candida at 9.0%.[25] Among the Gram-negative isolates, Klebsiella species (13.7%) and E. coli (10.4%) were the most prevalent.[25]

Microbe	Percentage of ICU-BSIs	Source Significance
Gram-negative	47.2%	Lungs, Urine, Abdomen
Gram-positive	41.4%	Skin, Joint, Spine, IE
Candida	9.0%	Immunocompromised, GI
E. coli	10.4%	Primary Urinary/GI pathogen
S. aureus	8.4%	Primary Skin/Bone pathogen

Antimicrobial Resistance (AMR) Impact

Resistance patterns in the UK show that 22% of Klebsiella pneumoniae isolates are resistant to piperacillin-tazobactam, and resistance to third-generation cephalosporins is also rising.[14, 25] Ethnic disparities in AMR have also been documented; for instance, Asian or Asian British groups had almost double the proportion of antibiotic-resistant sepsis infections (34.6%) compared to White ethnic groups (18.7%).[14] These findings emphasize that the "U" (Urine) and "A" (Abdomen) components of LUCAS—often the primary reservoirs for these pathogens—require aggressive diagnostic sampling before empirical antibiotics are tailored.

Conclusion: The Integrated Approach to Sepsis Source Identification

The management of sepsis within the NHS is a race against time, where physiological stabilization must be coupled with anatomical precision. The expanded LUCAS mnemonic (Lungs, Urine, CNS, Abdomen, Skin, Spine, Septic joints, Septic emboli, Endocarditis) provides a comprehensive roadmap for the Emergency Department clinician to ensure that no high-morbidity source is overlooked. While the Lungs and Urine remain the most prevalent sources, the increasing incidence of spinal infections and the persistent mortality of abdominal sepsis necessitate a systematic survey.

Data from the ICNARC Case Mix Programme and HES statistics indicate that sepsis is increasingly a disease of the elderly and frail, populations in whom the "Think Sepsis" mandate is most difficult to fulfill due to vague clinical presentations. By integrating bedside aids like NEWS2 with source-centric mnemonics like LUCAS, and leveraging technological advances such as POCUS and machine learning risk scores, the NHS can continue to drive down mortality rates. The ultimate goal of these tools is to bridge the "Golden Hour" gap—transforming clinical suspicion into targeted, life-saving intervention.

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1. Rising rates of sepsis in England: an ecological study - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12675601/
2. EM Basic-‐ Heme Onc Part 1-‐ Oncology Emergencies, http://embasic.org/wp-content/uploads/2015/10/52_Heme-Onc-Part-1-Oncology-Emergencies1.pdf
3. Sepsis 3.0- March 2017 - EM Basic, http://embasic.org/wp-content/uploads/2017/03/60_Sepsis-3.0-Updated-March-2017.pdf
4. Management of adult spontaneous spondylodiscitis and its rising ..., https://publishing.rcseng.ac.uk/doi/10.1308/rcsann.2015.0009
5. References & Sources - The UK Sepsis Trust, https://sepsistrust.org/about-sepsis/references-sources/
6. Sepsis-Manual-7th-Edition-2024-V1.0.pdf, https://sepsistrust.org/wp-content/uploads/2024/07/Sepsis-Manual-7th-Edition-2024-V1.0.pdf
7. (PDF) Presenting Symptoms in Sepsis: Is the Mnemonic “SEPSIS” Useful? - ResearchGate, https://www.researchgate.net/publication/342754960_Presenting_Symptoms_in_Sepsis_Is_the_Mnemonic_SEPSIS_Useful
8. Presenting Symptoms in Sepsis: Is the Mnemonic "SEPSIS" Useful? - PubMed, https://pubmed.ncbi.nlm.nih.gov/32753915/
9. Presenting Symptoms in Sepsis: Is the Mnemonic “SEPSIS” Useful? - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC7354908/
10. Differences in Impact of Definitional Elements on Mortality Precludes ..., https://www.rcn.org.uk/-/media/Royal-College-Of-Nursing/Documents/Clinical-Topics/Sepsis-epidemiology-uk.pdf
11. A prospective observational study assessing the outcome of Sepsis in intensive care unit of a tertiary care hospital, Peshawar - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC4928424/
12. The Prevalence of Severe Sepsis or Septic Shock in an Irish Emergency Department, https://imj.ie/the-prevalence-of-severe-sepsis-or-septic-shock-in-an-irish-emergency-department/
13. Harrisson DA, Welch CA, Eddleston JM. The epidemiology of severe sepsis in England, Wales and Northern Ireland, 1996 to 2004: secondary analysis of a high quality clinical database, the ICNARC Case Mix Programme Database. Crit Care 10:R42 - ResearchGate, https://www.researchgate.net/publication/7237201_Harrisson_DA_Welch_CA_Eddleston_JM_The_epidemiology_of_severe_sepsis_in_England_Wales_and_Northern_Ireland_1996_to_2004_secondary_analysis_of_a_high_quality_clinical_database_the_ICNARC_Case_Mix_Progr
14. Sepsis Awareness - UK Parliament, https://researchbriefings.files.parliament.uk/documents/CDP-2024-0122/CDP-2024-0122.pdf
15. Paediatric Sepsis Guideline - North West Children's ODN Hub, https://northwestchildrensodnhub.nhs.uk/wp-content/uploads/2025/12/Sepsis-guideline-ver-3-FINAL-ratified-12.12.25-1.pdf
16. About sepsis - The UK Sepsis Trust, https://sepsistrust.org/about-sepsis/
17. Finding and controlling the source of infection | Suspected sepsis in ..., https://www.nice.org.uk/guidance/ng253/chapter/Finding-and-controlling-the-source-of-infection
18. Statement on the initial antimicrobial treatment of sepsis | AOMRC, https://www.aomrc.org.uk/publication/statement-on-the-initial-antimicrobial-treatment-of-sepsis-v2-0/
19. What is the mnemonic to remember the main symptoms of septic shock? - Dr.Oracle, https://www.droracle.ai/articles/176898/what-is-the-mnemonic-to-remember-the-main-symptoms
20. LAVOE, An Easy Mnemonic for the Initial Management of Sepsis in Obstetric Patients, https://www.researchgate.net/publication/359389946_LAVOE_An_Easy_Mnemonic_for_the_Initial_Management_of_Sepsis_in_Obstetric_Patients
21. Effect on number of sepsis episodes and in-hospital mortality depending... - ResearchGate, https://www.researchgate.net/figure/Effect-on-number-of-sepsis-episodes-and-in-hospital-mortality-depending-on-different_fig1_339084841
22. The Prevalence of Severe Sepsis or Septic Shock in an Irish Emergency Department - CORA, https://cora.ucc.ie/bitstreams/9dcdaf81-a99f-4024-a15b-e4ee2e928d54/download
23. S 12 - Sepsis and systemic or disseminated infections - Royal College of Pathologists, https://www.rcpath.org/static/3f51b8e5-1ebe-469d-a79f3a3323bfaec9/uk-smi-s-12i1-1-sepsis-and-systemic-or-disseminated-infection-april-2025-pdf.pdf
24. Identification and Management of Maternal Sepsis During and Following Pregnancy - Professor Janesh Gupta, https://www.guptalegal.co.uk/wp-content/uploads/gtg_64.pdf
25. Surveillance of bloodstream infections in critical care units, England: May 2016 to March 2025 - GOV.UK, https://www.gov.uk/government/statistics/surveillance-of-bloodstream-infections-in-critical-care-england/surveillance-of-bloodstream-infections-in-critical-care-units-england-may-2016-to-march-2025
26. Recognition, diagnosis, and early management of sepsis: NICE guideline - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC5565828/
27. Health Care–Associated Bloodstream Infections in Adults: A Reason To Change the Accepted Definition of Community-Acquired Infections - ACP Journals, https://www.acpjournals.org/doi/10.7326/0003-4819-137-10-200211190-00007
28. What Is the Source? Identifying the Cause of Septic Shock in a Patient | Annals of the American Thoracic Society, https://www.atsjournals.org/doi/full/10.1513/AnnalsATS.201907-562CC
29. Improving Sepsis Outcomes Through Early Detection And Collaboration With Nursing, Lab And Radiology - Migration Letters, https://migrationletters.com/index.php/ml/article/download/9870/6489/24732
30. Predictors of mortality from extended-spectrum beta-lactamase-producing Enterobacteriaceae bacteremia - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC10243396/
31. Spondylodiscitis: update on diagnosis and management | Journal of Antimicrobial Chemotherapy | Oxford Academic, https://academic.oup.com/jac/article/65/suppl_3/iii11/923760?login=true
32. Lemierre's Syndrome in the 21st Century: A Literature Review - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC10505273/
33. Warning over early signs of brain inflammation as experts call for national guidelines, https://www.independent.co.uk/news/health/encephalitis-mia-lucas-symptoms-diagnosis-b2929694.html
34. Paediatric Sepsis Re-audit, https://www.dbth.nhs.uk/wp-content/uploads/2021/10/1441-Paediatric-NICE-Sepsis-Audit-2020-21.pdf
35. Time to Act: severe Sepsis - Parliamentary and Health Service Ombudsman (PHSO), https://www.ombudsman.org.uk/sites/default/files/2016-08/FINAL_Sepsis_Report_web.pdf
36. Improving Diagnosis and Treatment of Maternal Sepsis, https://www.cmqcc.org/files/Sepsis%20Toolkit_FINAL.2_Errata_7.1.22.pdf
37. Infection prevention and control manual - Rotherham Doncaster and South Humber NHS Foundation Trust, https://www.rdash.nhs.uk/policies/infection-prevention-and-control-manual/
38. (PDF) Prevalence, Underlying Causes, and Preventability of Sepsis-Associated Mortality in US Acute Care Hospitals - ResearchGate, https://www.researchgate.net/publication/331144144_Prevalence_Underlying_Causes_and_Preventability_of_Sepsis-Associated_Mortality_in_US_Acute_Care_Hospitals
39. Sepsis and chronic wounds: What do you know? What should you know?, https://wounds-uk.com/wp-content/uploads/2023/02/content_11868.pdf
40. Septic pulmonary emboli: a case discussion - MAG Online Library, https://www.magonlinelibrary.com/doi/pdf/10.12968/bjon.2023.32.17.832?download=true
41. Prevalence and incidence of emergency department presentations and hospital separations with injecting-related infections in a longitudinal cohort of people who inject drugs - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC10728979/
42. Evaluation and Management of Septic Arthritis and its Mimics in the Emergency Department, https://pmc.ncbi.nlm.nih.gov/articles/PMC6404712/
43. Management of septic arthritis in adults with a hot swollen joint: British Society for Rheumatology guideline scope - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12167650/
44. Joint Aspiration for the Diagnosis of Suspected Native Septic Arthritis - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12619981/
45. Septic Arthritis (Causes, Treatment, and Management) - Patient.info, https://patient.info/doctor/infectious-disease/septic-arthritis-pro
46. Septic Arthritis: An Evidence-Based Review of Diagnosis and Image-Guided Aspiration, https://ajronline.org/doi/10.2214/AJR.20.22773
47. The Evolving Landscape of Infective Endocarditis: Difficult-to-Treat Resistance Bacteria and Novel Diagnostics at the Foreground - MDPI, https://www.mdpi.com/2077-0383/14/6/2087
48. Clinical features of patients with infective endocarditis presenting to ..., https://pmc.ncbi.nlm.nih.gov/articles/PMC5719206/
49. Associations and Outcomes of Septic Pulmonary Embolism - ResearchGate, https://www.researchgate.net/publication/265298408_Associations_and_Outcomes_of_Septic_Pulmonary_Embolism
50. Septic Pulmonary Embolism Requiring Critical Care: Clinicoradiological Spectrum, Causative Pathogens and Outcomes - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC5054769/
51. Patients with Septic Pulmonary Embolism | IJGM - Dove Medical Press, https://www.dovepress.com/presenting-clinicoradiological-features-microbiological-spectrum-and-o-peer-reviewed-fulltext-article-IJGM
52. Machine Learning Model to Identify Sepsis Patients in the Emergency Department: Algorithm Development and Validation - ResearchGate, https://www.researchgate.net/publication/355446267_Machine_Learning_Model_to_Identify_Sepsis_Patients_in_the_Emergency_Department_Algorithm_Development_and_Validation
53. LUCAS: A highly accurate yet simple risk calculator that predicts survival of COVID-19 patients using rapid routine tests - medRxiv, https://www.medrxiv.org/content/10.1101/2021.04.27.21256196v1.full.pdf