Higher Procalcitonin Levels Research Articles

Diagnostic role of high Sensitive-CRP and procalcitonin in hospitalized patients.

Objective: To assess these two biomarkers' effectiveness in admitted patients of Farooq Hospital Lahore, Pakistan. Study Design: Prospective study. Setting: Farooq Hospital Westwood, Lahore. Period: November 2023 to January 2024. Methods: The admitted patients of intensive care units, medical and cardiac care units, with acute kidney infection, chronic kidney disease, diabetes mellitus, hypertension, coronary artery bypass grafting, gastroenteritis, chronic obstructive pulmonary disease, liver disease, hepatitis, and bacterial infection were included. The automated analyzers analyzed the serum albumin, high-sensitive C-reactive protein (hs-CRP), and procalcitonin. Data was analyzed by using SPSS (v.25.0). Results: Among 73 patients, 83.56% were critical and 16.44% stable. It was found that the highest critical patients were under the age of 61 to 90 years. The hs-CRP and procalcitonin levels were non-significantly correlated with age group. The hs-CRP exhibited higher sensitivity than procalcitonin in critical patients (AUC: 0.872 vs. 0.725). Likewise, serum albumin had a significant association with patients having critical conditions (AUC: 0.685). Moreover, it was found that hs-CRP and procalcitonin have a significant association with the period of patient stay in the hospital. Conclusion: The present study concluded that patients with high levels of procalcitonin and hs-CRP had longer hospital stays and that both biomarkers are equally important in the treatment of critically ill admitted patients.

Persistently high plasma procalcitonin levels despite successful treatment of tuberculous pleuritis and tuberculous lymphadenitis patients

In a prospective cohort study, we evaluated plasma PCT levels in 48 TB lymphadenitis (TBLN) and 41 TB pleuritis (TBPE) patients. Measurements of PCT were done in unstimulated plasma of microbiologically and clinically confirmed TBLN and TBPE patients registered for anti-TB treatment at a tertiary care hospital in Lahore, Pakistan. Plasma levels of PCT were found to be raised in 89% of the patients at baseline with a median of 1.5 ng/ml. Levels were higher (p = 0.001) in TBLN as compared to TBPE (2.69, 0.96 ng/ml). PCT levels were not related to the bacterial burden depicted by culture positivity in these patients. PCT showed a negative correlation with the severity of constitutional symptoms (rho = − 0.238, p = 0.034), and inflammatory biomarkers; ferritin (rho = − 0.43, p < 0.001), INF-γ (rho = − 0.314, p = 0.003), TNF-α (rho = − 0.220, p = 0.039), IL-6 (rho = − 0.224, p = 0.035), and several chemokines of CCL and CCXL group. Raised plasma levels of PCT did not decrease with anti-TB treatment, indicating it is not a good biomarker to monitor treatment response in TBLN and TBPE patients. More studies with a larger number of confirmed EPTB cases are needed to define the role of PCT and its interaction with other biomarkers in EPTB.

Aeromonas veronii-associated bacteremia in the course of treatment of acute myeloid leukemia: a case report and review of the literature

PurposeThis study aimed to report a case of acute myeloid leukemia (AML) complicated by Aeromonas veronii infection-induced bacteremia and to review relevant literature on the etiology, prevention, treatment, and prognosis of bacteremia in immunocompromised populations, aiming to reduce mortality in individuals with hematologic and other end-stage diseases and improve patient outcomes.Methods and resultsWe reported the case of a 23-year-old male patient with relapsed AML characterized by AML1:ETO and ASXL positivity, classified as a high-risk group. The patient presented with fever, abdominal pain, diarrhea, nausea, and vomiting after consuming partially cooked fish. The patient was admitted with high leucocytes, C-reactive protein, procalcitonin, and interleukin-6 levels. Peripheral blood high-throughput sequencing (Next-Generation Sequencing NGS) confirmed infection with Aeromonas veronii, while an abdominal CT scan indicated a liver abscess with gas formation. Culture of the drainage fluid from the ultrasound-guided liver abscess puncture demonstrated growth of Aeromonas veronii. Based on the sensitivity results, the patient was treated with intravenous ciprofloxacin and cefoperazone-sulbactam. After treatment with antibiotics, blood transfusion, liver protection, and azacitidine 100 mg ih, combined with dry white sand(interferon alpha-1B, interleukin-2, and thalidomide), the critical condition of the patient improved, and he was discharged. This study was approved by the Ethics Committee of Medical Research in the Second Affiliated Hospital of Henan University of Science and Technology. Informed consent was obtained from this patient and we have obscured the patient's identifying information. All methods were carried out in accordance with relevant guidelines and regulations.ConclusionWhen patients with a recurrence of AML have a history of consuming or contacting aquatic products, clinicians should be vigilant about Aeromonas veronii infection. The presence of Aeromonas veronii in peripheral blood must alert clinicians to the possibility of severe sepsis and septic shock. Early diagnosis and prompt treatment are crucial to reducing patient mortality.

Changes of Procalcitonin Kinetics According to Renal Clearance in Critically Ill Patients with Primary Gram-Negative Bloodstream Infections.

This study aimed to investigate the relationship between procalcitonin (PCT) kinetic and estimated glomerular filtration rates (eGFR) in critically ill patients who had Gram-negative primary bloodstream infection (GN-BSI) and responded to the antimicrobial therapy. This single-centered study was retrospective and observational. Critically ill GN-BSI patients over 18 years old who had clinical and microbiological responses to antibiotic treatment were included in the study. Patients were divided into two groups according to eGFR (eGFR <30 mL/min/1.73m2 and ≥30 mL/min/1.73m2) and compared for PCT kinetic at seven different measurement points as initial, first, third, fifth, seventh, tenth, and fourteenth days. The study included 138 patients. Initial PCT levels were higher in patients with eGFR <30 mL/min/1.73m2 (4.58 [1.36-39.4] ng/mL) than in eGFR ≥30 mL/min/1.73m2 (0.91 [0.32-10.2]) (p<0.001). This elevation was present at all measurement points (p<0.05). The decrease in PCT values by ≥30% (26.0% vs 47.9%; p=0.024) on the third day and ≥50% (69.2% vs 76.6%; p=0.411) on the fifth day was less in the low eGFR (<30 mL/min/1.73m2) group. The effect of low GFR on serum PCT kinetic was present in both fermenter and non-fermenter GN-BSIs but was more prominent in the fermenter group. Serum PCT levels during therapy were higher in patients with low eGFR. Early PCT (<5 days) response was not obtained in non-fermenter GN-BSI patients with low eGFR. Antibiotic revision decisions should be made more carefully in patients with low eGFR due to high initial PCT levels and slow PCT kinetic.

Food-Protein-Induced Proctocolitis in Pre-Term Newborns with Bloody Stools in a Neonatal Intensive Care Unit.

The bloody stools of newborns may be a clue for several clinical entities of varying severity, ranging from idiopathic neonatal transient colitis to food-protein-induced allergic proctocolitis (FPIAP) or necrotizing enterocolitis (NEC). Distinguishing among them at an early stage is challenging but crucial, as the treatments and prognoses are different. We conducted a monocentric retrospective study including all pre-term infants with bloody stools admitted to the Neonatal Intensive Care Unit (NICU) of the Vittore Buzzi Children's Hospital (Milan) from December 2022 to May 2024. Patients diagnosed with NEC exhibited significantly lower eosinophil counts and higher procalcitonin levels than both patients with FPIAP and patients with idiopathic neonatal transient colitis, as well as a statistically significant increase in pathological features from abdomen ultrasounds and abdominal X-rays. In contrast, no lab markers or imaging techniques have been demonstrated to be useful in distinguishing between idiopathic neonatal transient colitis and FPIAP. Thus, after excluding a diagnosis of NEC, the only way to confirm FPIAP is through the oral food challenge, which can be performed in premature newborns presenting with bloody stools who are otherwise healthy and under medical supervision, in order to identify infants who may benefit from a cow's-milk-free diet.

Prognostic risk factors for pyogenic liver abscess caused by Klebsiella pneumoniae

BackgroundPyogenic liver abscess (PLA) caused by Klebsiella pneumoniae can vary in severity, and several risk factors for the development of organ dysfunction in PLA have been implicated. However, few studies to date have explored the most common risk factors for clinical severity.MethodsWe conducted a study on patients with PLA caused by Klebsiella pneumoniae between February 2013 and December 2022.Using logistic regression analysis, we sought to identify factors associated with positive blood culture, septic shock, and intensive care unit (ICU) admission.ResultsAfter included 200 patients, we found that an elevated procalcitonin (PCT) level (p = 0.03), higher glucose level (p = 0.03), and lower total cholesterol (TC) level (p = 0.01) were associated with a higher likelihood of positive blood bacteriological culture. Additionally, an increased PCT level (p = 0.02) and lower TC level (p < 0.01) were associated with an elevated risk of septic shock. Furthermore, a higher PCT level (p < 0.01) was associated with a higher probability of ICU admission.ConclusionIn patients with PLA caused by Klebsiella pneumoniae, the PCT, glucose, and TC levels were found to be associated with positive blood culture, septic shock, and ICU admission.

Role of C-reactive Protein and Procalcitonin in Early Diagnostic Accuracy and Their Prognostic Significance in Sepsis.

Sepsis is a serious condition that often results in high fatality rates, particularly in intensive care units (ICUs). Its nonspecific clinical characteristics makes early diagnosis and therapy difficult, despite how critical they are. The use of biomarkers like procalcitonin (PCT) and C-reactive protein (CRP) in the diagnosis and prognosis of sepsis has demonstrated encouraging results. In contrast to PCT, which is highly selective for bacterial infections, CRP is an acute-phase protein that reflects systemic inflammation. This study aimed to assess the diagnostic accuracy and prognostic significance of CRP and PCT in early sepsis detection and outcome prediction. This study was a retrospective cohort study that involved 90 patients in the ICU who met the criteria for sepsis-3. CRP and PCT levels, clinical data, and outcomes were obtained from electronic medical records. The diagnostic accuracy was tested using receiver operating characteristic (ROC) curves, while the prognostic relevance was analyzed by Kaplan-Meier survival analysis and Cox proportional hazards regression. The mean CRP level was 102.3 mg/L and PCT level was 5.4 ng/mL. ROC analysis revealed an area under the curve (AUC) of 0.78 for CRP and 0.82 for PCT, indicating better diagnostic performance for PCT. High levels of CRP and PCT were associated with poorer survival, with median survival times of 18 and 15 days, respectively, for high-level groups. Cox regression identified CRP and PCT as significant predictors of mortality, with hazard ratios of 1.50 and 1.68, respectively. Both CRP and PCT are valuable biomarkers for diagnosing and prognosticating sepsis. PCT, with its higher specificity for bacterial infections, demonstrates superior diagnostic accuracy compared to CRP. Elevated levels of both biomarkers are associated with increased mortality risk, highlighting their potential role in early sepsis management and outcome prediction.

Neutrophil to lymphocyte ratio and serum procalcitonin level as a predictor of spontaneous ureteral stone passage: A prospective study.

Ureteric stone is responsible for around 20% of urinary tract stones and among them 70% of these are located in distal portion of the ureter. Stone causing ureter obstruction produce inflammatory changes in ureteric wall and prevent spontaneous passage of stone. The objective of the study is to compare the predictive role of procalcitonin and Neutrophil-to-lymphocyte ratio (NLR) for spontaneous passage of stone. Total 150 participants having ureteric stone of 4-8 mm, were included in prospective observational study. The patients were followed up for 4 weeks. Spontaneous Stone Passage (SSP) was confirmed with either the patient collecting the stone during urination or by Non-Contrast CT performed at 4 weeks. Blood samples of the patients were analysed and White blood cells, sedimentation, Neutrophile to Lymphocyte (NLR), procalcitonin level compared to analyse predictors of future SSP. The procalcitonin levels of the Spontaneous stone passing SSP (-ve) group (209.05 ± 78.45 pg/ml) were significantly higher than the not passing the SSP (+ve) group (130.76 ± 24.18) (p < 0.001). NLR is significantly higher in the SSP -ve (3.84 ± 0.41) than the SSP +ve (2.18 ± 0.38) group (p < 0.001). In single and multivariate analysis, significant activity was found for procalcitonin in SP +ve group. The findings of the study suggests that high level of procalcitonin, and high NLR have a negative effect on passage of stone. So early intervention can be planned to these patients to prevent complications.

Outcome of High Dose Vitamin D on Prognosis of Sepsis Requiring Mechanical Ventilation: A Randomized Controlled Trial

Abstract Background Critically ill patients have an increased requirement for vitamin D in sepsis and these patients have low levels of vitamin D. The researchers validated the efficiency and safety of high-dose oral vitamin D (50,000 IU) in patients with sepsis requiring mechanical ventilation. Methods Seventy five patients were randomly assigned to 2 groups (Group I = 37 patient and Group II = 38 patient) in accordance with the vitamin D treatment regimen: Group I (GI): patients received 50,000 IU vitamin D crushed and diluted in 50 ml of water and delivered to patients in the nasogastric tube (NGT) once daily for 5 consecutive days; Group II (GII): patients received daily requirements of vitamin D (5000 IU/ day) crushed in 50 ml of water and delivered to patients in the nasogastric tube (NGT) once daily for 5 consecutive days. Primary outcome of this study was the change in procalcitonin levels at day 7 and the changes in plasma vitamin D levels were secondary outcomes. Results Procalcitonin (PCT) decreased at day 4 and day 7 in study groups, procalcitonin (PCT) levels at days 4, 7 were significantly lower in high dose group (p &amp;lt; 0.032 and p &amp;lt; 0.013, respectively) and procalcitonin (PCT) levels reductions (day 7 – day 0) were significantly higher in high dose group (p &amp;lt; 0.010). Serum vitamin D (25(OH)D) levels increased at day 4 then decreased at day 7 in study groups, serum Vitamin D (25(OH)D) levels at days 4, 7 were significantly higher in high dose group (p &amp;lt; 0.001 and p &amp;lt; 0.001, respectively) and serum Vitamin D (25(OH)D) levels elevations (day 7 – day 0) were significantly higher in high dose group (p &amp;lt; 0.001). Conclusion The early use of high-dose oral vitamin D in patients with sepsis requiring mechanical ventilation in combination with the standard treatment for sepsis lowered the procalcitonin level, increased the antioxidant status, and improved the illness severity. Trial Registration This trial is registered with ClinicalTrials.gov Identifier (NCT05244018).

Factors Associated with Post-rewarming Procalcitonin Levels in Newborns with Hypoxic Ischemic Encephalopathy.

To determine the factors associated with the procalcitonin levels in newborns with hypoxic-ischemic encephalopathy (HIE) who received therapeutic hypothermia (TH). The neonates, who had moderate/severe HIE and were treated with TH, were included. The neonates were arranged into 2 groups by procalcitonin (PCT) level after rewarming was completed. The neonates who had a procalcitonin level of < 2.5 ng/ml constituted Group 1 and the ones who had a procalcitonin level of ≥ 2.5 ng/ml constituted Group 2. Univariate and multivariate logistic regression was used to assess the factors related with PCT level. The first group included 123 (87.9%) neonates and the second group included 17 (12.1%) neonates. The median gestational age was 38 (36-39) weeks and the mean birth weight was 3081.7 ± 552.8 grams. In group 2, the rates for severe HIE, cesarean section, antibiotic switch, convulsion, inotrope use and mortality were higher, and duration of hospitalization was longer, whereas Apgar scores were lower (P < .05). The risk of a high procalcitonin level was found to be 6-fold (95% CI 1.9-19.1) higher in severe HIE and 5.2-fold higher (95% CI 1.7-16) in cesarean delivery. In neonates with HIE/TH, high post-rewarming procalcitonin levels were related with severe HIE and cesarean delivery. Some other clinical and laboratory findings, which may reflect worse clinical status, were also associated with high procalcitonin levels.

The Implication of Elevated Serum Myoglobin Level in Acute Diabetic Complications of Ketoacidosis and Hyperglycemic Hyperosmolar State: A Real-World Study.

To investigate the implications of elevated myoglobin (MYO) in acute diabetic conditions of diabetic ketoacidosis (DKA) and hyperosmolar hyperglycemic state (HHS). This study integrates in-patient data from Shanghai Pudong Hospital from 2019 to 2023. Laboratory data were compared between stable T2D patients (without acute diabetic complications), DKA, and HHS patients. The multilinear regression explored variables relevant to the elevated MYO in DKA and HHS. The dynamics of MYO, the survival rate, and associated risk factors in HHS were determined. Except for triglyceride, procalcitonin, low-density lipoprotein, islet cell autoimmune antibodies, N-terminal Pro-brain natriuretic peptide (NT-ProBNP), and brain natriuretic peptide (BNP), there were significant differences in age, gender distribution, duration of diabetes, type of diabetes, and other referred laboratory data (p<0.05). The age, gender, creatine kinase (CK), estimated glomerular filtration rate (eGFR), and free triiodothyronine (FT3) in DKA, whereas osmolar, uric acid (UA), and cardiac troponin I (cTNI) in the HHS, were significant determinants of elevated MYO, respectively (p<0.05). The dynamic of MYO in HHS was in line with the survival trend, where the percentage of death was 29.73%, and aging with higher procalcitonin levels was a key risk factor. Besides, the cumulative survival rates between patients with or without bone fracture or muscle injury were substantially different. This real-world study demonstrated DKA and HHS potentially have unique causes for increased MYO. By utilizing the appropriate regression parameters, we could forecast the progression of increased MYO in groups of DKA and HHS, while based on risk factors of aging, severity of infection, and different MYO sources, we could predict the prognosis of HHS.

Advanced medullary thyroid carcinoma uncovered by persistently elevated procalcitonin in a patient with COVID-19.

We report the case of an 88-year-old man hospitalized for COVID-19 with persistently very high procalcitonin (proCt) levels despite infection resolution. Since proCt is an adjunct tumor marker in the diagnosis of medullary thyroid carcinoma (MTC), serum calcitonin (Ct) was also measured showing very high levels. Computed tomography (CT) scan showed the presence of a thyroid mass and neck ultrasound revealed a solid isoechoic, inhomogeneous, 50 mm nodule in the right thyroid lobe, extended into the mediastinum. Fine needle aspiration (FNA) of the thyroid nodule confirmed the diagnosis of MTC. An 18F-fluorodopa positron emission tomography/computed tomography (PET/CT) scan revealed the presence of distant metastases in ribs, vertebrae, in the right iliac wing and the liver. Since surgery was not feasible, the patient was started on cabozantinib 40 mg/dL. After 16 months the patient is still on cabozantinib at the same dose, he reports complete autonomy in daily life activities, and serum Ct is still elevated; however, the imaging evaluation does not show signs of disease progression. High procalcitonin serum values despite the absence of infection are suggestive of MTC. Advanced MTC with multiple metastases can have an indolent course and can go unrecognized for years. Cabozantinib is a valuable option for the treatment of advanced MTC.

Development and application of a risk nomogram for the prediction of risk of carbapenem-resistant Acinetobacter baumannii infections in neuro-intensive care unit: a mixed method study

ObjectiveThis study aimed to develop and apply a nomogram with good accuracy to predict the risk of CRAB infections in neuro-critically ill patients. In addition, the difficulties and expectations of application such a tool in clinical practice was investigated.MethodsA mixed methods sequential explanatory study design was utilized. We first conducted a retrospective study to identify the risk factors for the development of CRAB infections in neuro-critically ill patients; and further develop and validate a nomogram predictive model. Then, based on the developed predictive tool, medical staff in the neuro-ICU were received an in-depth interview to investigate their opinions and barriers in using the prediction tool during clinical practice. The model development and validation is carried out by R. The transcripts of the interviews were analyzed by Maxqda.ResultsIn our cohort, the occurrence of CRAB infections was 8.63% (47/544). Multivariate regression analysis showed that the length of neuro-ICU stay, male, diabetes, low red blood cell (RBC) count, high levels of procalcitonin (PCT), and number of antibiotics ≥ 2 were independent risk factors for CRAB infections in neuro-ICU patients. Our nomogram model demonstrated a good calibration and discrimination in both training and validation sets, with AUC values of 0.816 and 0.875. Additionally, the model demonstrated good clinical utility. The significant barriers identified in the interview include “skepticism about the accuracy of the model”, “delay in early prediction by the indicator of length of neuro-ICU stay”, and “lack of a proper protocol for clinical application”.ConclusionsWe established and validated a nomogram incorporating six easily accessed indicators during clinical practice (the length of neuro-ICU stay, male, diabetes, RBC, PCT level, and the number of antibiotics used) to predict the risk of CRAB infections in neuro-ICU patients. Medical staff are generally interested in using the tool to predict the risk of CRAB, however delivering clinical prediction tools in routine clinical practice remains challenging.

The utility of procalcitonin in febrile neutropenia.

12040 Background: The utility of procalcitonin (PCT) in febrile neutropenia (FN) in oncology patients on active therapy has not been well validated. FN constitutes a critical oncologic emergency, often characterized by subtle manifestations of infection, and timely diagnosis and treatment is vital. Although a potential harbinger of dangerous infection, FN can also occur without an identifiable infection, in which case hospitalization and antibiotics may be unnecessary. PCT, an amino acid, is elevated specifically during bacterial infections in the non-cancer population and correlates with infection severity. Clinicians employ PCT levels as a diagnostic adjunct, discerning bacterial from viral infections and analyzing PCT changes to guide treatment decisions. We examined oncology patients presenting with FN to correlate PCT levels and trends with confirmed infections. Methods: We identified patients with neutropenic fever, cancer, and a PCT result seen at our institution from 12/1/2017-12/1/2022. Patients were determined to have a confirmed infection if they had a positive bacterial blood culture. Demographics and clinical characteristics were compared between infection status and induction chemotherapy or transplant status using a Wilcoxon Rank Sum test for continuous variables and a Chi-Square or Fisher’s Exact test for categorical variables. Baseline (at time of initial FN) and highest PCT levels were compared by patient and disease characteristics and proven infection using Wilcoxon Rank Sum test. Logistic regression was used to determine the association of log-transformed PCT (baseline and highest) with proven infection (yes/no) while adjusting for covariates. All tests were two-tailed with p&lt; 0.05 considered statistically significant. Results: Of 365 patients, 61 (16.7%) had an identified infection. Median baseline and peak PCT of 1.26 and 1.51 ng/mL, respectively, were significantly greater for these patients as compared to those with negative cultures at 0.54 and 0.65 ng/mL, respectively (P= 0.01 and &lt;0.01). For every unit increase in the log transformed baseline PCT, the odds of having a proven infection increased by 23%. There were no significant differences in patient or clinical characteristics between those with and without infection. Of those admitted for induction chemotherapy and transplant who developed FN, PCT at time of initial fever was higher at 0.97 vs 0.56 ng/mL (p=0.02). Interestingly, median baseline and median peak PCT differed between gender with females 0.51 and males 0.72 ng/mL (p=0.02) at baseline, and 0.63 vs 0.83 ng/mL (p=0.04), respectively, at peak. Conclusions: PCT levels in cancer patients with FN are significantly associated with culture positive infection. This data can help guide treatment and de-escalation of antibiotics in cancer patients admitted with FN. Further evaluation should be taken to determine how to best use PCT to determine the need for admission and antibiotic prescription.

Invasive Streptococcal Infection in Children: An Italian Case Series.

Since October 2022, alerts have spread from several countries about the increase in invasive group A streptococcal (iGAS) and scarlet fever cases affecting young children. We aim to analyze the epidemiology of GAS infections in the last 12 years in our hospital and identify the clinical features of invasive cases observed in 2023. We conducted a retrospective study enrolling children and adolescents hospitalized at our pediatric clinic from January to December 2023 for a definitive diagnosis of iGAS infection. Clinical, laboratory, and imaging data were collected and analyzed. Comparing 2016 and 2023, we observed a similar number of GAS infections (65 vs. 60 cases). Five children with iGAS infection were hospitalized between March and April 2023. The median age was five years. At admission, all patients showed tachycardia disproportionate to their body temperature. Vomiting was a recurrent symptom (80%). Laboratory tests mostly showed lymphopenia, hyponatremia, and high inflammatory markers. The number of pediatric iGAS cases significantly increased in 2023. Clinical (pre-school-aged children with high fever, unexplained tachycardia, and vomiting) and laboratory parameters (high procalcitonin levels, hyponatremia, and lymphopenia) could help identify and suspect a potential iGAS infection.

Clinical Characteristics and Risk Factors for Mortality in Children with Carbapenem-Resistant Klebsiella pneumoniae-Induced Bloodstream Infections

Background: Klebsiella pneumoniae (KP) is commonly found in human intestinal and respiratory tracts. Objectives: This study aimed to investigate the clinical characteristics and risk factors associated with mortality in children suffering from carbapenem-resistant Klebsiella pneumoniae (CRKP)-induced bloodstream infections. Methods: We collected clinical data from 160 children diagnosed with CRKP-induced bloodstream infections. These children were divided into two groups based on their outcomes 30 days post-infection: A death group (n = 61) and a survival group (n = 99). Clinical symptoms and outcomes were meticulously documented. Results: The death group experienced a significantly shorter hospital stay than the survival group. Additionally, higher incidence rates of sepsis, malignant tumors, renal diseases, infectious shock, surgical site infections, higher acute physiology and chronic health evaluation II (APACHE II) scores, and elevated procalcitonin levels were observed in the death group (P &lt; 0.05). These factors were all identified as independent risk factors for mortality among children with CRKP-induced bloodstream infections (P &lt; 0.05). The areas under the receiver operating characteristic (ROC) curves for the length of hospital stay, presence of malignant tumors, sepsis, renal diseases, APACHE II score, procalcitonin levels, infectious shock, and surgical site infections all exceeded 0.700, indicating their high predictive value for mortality. Conclusions: The mortality rate among children with CRKP-induced bloodstream infections is high. Factors such as a brief hospital stay, presence of malignant tumors, sepsis, renal diseases, infectious shock, elevated APACHE II score, and high procalcitonin levels significantly contribute to the risk of death.

Increasing Rate of Fatal Streptococcus pyogenes Bacteriemia—A Challenge for Prompt Diagnosis and Appropriate Therapy in Real Praxis

Streptococcus pyogenes, group A streptococci (GAS) bacteriaemia, is a life-threatening infection with high mortality, requiring fast diagnosis together with the use of appropriate antibiotic therapy as soon as possible. Our study analysed data from 93 patients with GAS bacteraemia at the General University Hospital in Prague between January 2006 and March 2024. In the years 2016–2019 there was an increase in GAS bacteraemia. Mortality in the period 2006–2019 was 21.9%; in the period 2020–2024, the mortality increased to 41.4%, p = 0.08. At the same time, in the post-2020 period, the time from hospital admission to death was reduced from 9.5 days to 3 days. A significant predictor of worse outcome in this period was high levels of procalcitonin, &gt;35.1 µg/L (100% sensitivity and 82.35% specificity), and lactate, &gt;5 mmol/L (90.91% sensitivity and 91.67% specificity). Myoglobin was a significant predictor in both compared periods, the AUC was 0.771, p = 0.044, and the AUC was an even 0.889, p ≤ 0.001, respectively. All isolates of S. pyogenes were susceptible to penicillin, and resistance to clindamycin was 20.3% from 2006–2019 and 10.3% in 2020–2024. Appropriate therapy was initiated in 89.1%. and 96.6%, respectively. We hypothesise that the increase in mortality after 2020 might be due to a decrease in the immune status of the population.

Problems in Conducting Multivariate Logistic Regression Analysis

We read with great interest the original article “The Relationship Between Procalcitonin Level and Short Term Mortality in Emergency Department” by Cehreli et al. (1). A high initial level of procalcitonin (PCT) is a sensitive marker of bacterial infection, and the degree of PCT elevation can determine which patients are at greater risk of adverse outcomes. In this study, the authors wanted to analyse whether there was an association between PCT levels and seven-day mortality in patients whom PCT levels were measured in the emergency department. However, we think that there are some serious methodological mistakes.

Comparison of diagnostic criteria for sepsis-associated acute kidney injury in the pediatric intensive care unit: a retrospective cohort study.

pRIFLE (Pediatric Risk, Injury, Failure, Loss, End Stage Renal Disease), KDIGO (Kidney Disease Improving Global Outcomes) and pROCK (Pediatric Reference Change Value Optimized for AKI) are diagnostic criteria used for acute kidney injury (AKI) incidence evaluation. The aim of this study was to explore the diagnostic consistency, incidence and mortality rate, clinical signs, and influencing factors of renal injury related to sepsis in children diagnosed by three different AKI diagnostic criteria, and then evaluate which one was more valuable. A retrospective analysis was performed on the clinical data of children with severe sepsis. The patients were diagnosed and staged according to the 2007 pRIFLE standard, the 2012 KDIGO standard, and the 2018 pROCK standard. The clinical characteristics and prognosis of children with different stages of sepsis were compared between the three diagnostic standards. A total of 62 patients with sepsis were included. Blood stream infection is common (11 cases, 17.74%). According to pRIFLE, KDIGO, and pROCK standards, the incidence of sepsis-associated AKI (SA-AKI) was 74.2%, 67.7%, and 56.5%, respectively. The pRIFLE had the highest diagnostic rate of early detection of SA-AKI. There was no statistical difference in SA-AKI incidence or staging consistency between the pRIFLE and KDIGO groups (κ=0.0671; κ>0.60); the consistency of SA-AKI diagnoses across the three standards was good (all P values <0.05), and pROCK demonstrated a higher specificity. A high Pediatric Risk of Mortality (PRISM) score and high procalcitonin level were independent risk factors. Shock and renal replacement therapy were independent risk factors for SA-AKI death. Death from admission to 28 days after admission was used as an endpoint to draw a survival graph, which revealed that the AKI group had a significantly higher risk of death than did the non-AKI group. The consistency of diagnosing SA-AKI across the three classification criteria was similar, and mortality rate increased with increased SA-AKI staging. The pRIFLE criteria were more sensitive in the early detection of SA-AKI, while the pROCK had higher specificity. There was no significant difference between the pRIFLE and KDIGO in terms of incidence, diagnosis, or staging of SA-AKI.

The interest of inflammatory biomarkers in the diagnostic approach in an internal medicine department: A cross-sectional study

Background The role of inflammatory biomarkers in etiological orientation is increasingly under study, and their potential significance is recognized. Given the diversity of diseases managed in internal medicine and the delayed results of microbiological tests, clinicians often face challenges in the diagnostic approach. This study aimed to describe the biomarkers’ role in distinguishing between infectious and noninfectious diseases and define their thresholds for infections. Methods Procalcitonin (PCT), neutrophil-to-lymphocyte-ratio (NLR), C-reactive-protein (CRP), fibrinogen, ferritinemia and lactate were measured on admission in all patients admitted to the Internal Medicine Department of Sahloul Hospital, over a 7-month period. The optimal cut-off values for the sensitivities and specificities to the infectious diseases were determined using receiver operating characteristic (ROC) curve analysis and Youden’s index. The diagnostic accuracy of biomarkers for predicting infectious etiologies was calculated by area under the curve (AUC). Results Overall, 164 patients were included of whom 32.3% had infectious diseases. The high mean levels of leukocytes (12,047 cells/mm3), NLR (9.7), CRP (152.5 mg/L), PCT (3.28 ng/ml) and fibrinogen (5.37g/L) were significantly linked to infectious etiologies. We identified cut-offs of NLR (6.1), CRP (123mg/L), PCT (0.24ng/mL) and fibrinogen (4.9g/L) to discriminate infectious etiologies in our population. For diagnosing infectious diseases, the CRP showed higher AUC (Sp:89.7%, Se:64.3%, AUC=0.9, 95% CI: 0.83, 0.96; p&lt;10-3) than PCT (Sp:86.1%, Se:62.3%, AUC=0,87, 95% CI: 0.80, 0.93; p&lt;10-3), NLR (Sp:87.1%, Se:61%, AUC=0.81, 95% CI: 0.731, 0.902; p&lt;10-3) and fibrinogen (Sp:84.7%, Se:68.3%, AUC=0.77, 95% CI: 0.65, 0.98; p&lt;10-3). The combination of CRP and NLR levels improved the diagnostic accuracy (AUC=0.93, 95% CI: 0.84, 0.96; p&lt;10-3) for distinguishing between infectious and non-infectious diseases. Conclusions Our study showed the usefulness of inflammatory biomarkers, particularly the NLR and its combination with CRP, which are low cost and easy to assess, in promoting the diagnostic accuracy to distinguish infections among other diagnoses.