A case of acute cholecystitis caused by methicillin-resistant Staphylococcus aureus in an immunocompromised patient

A Rare Case of Acute Cholecystitis Caused by Methicillin-Resistant Staphylococcus aureus (MRSA) in an Immunocompetent Person in the Absence of Bacteremia or Pre-Existing Conditions

Acute cholecystitis, typically caused by gallstone obstruction of the cystic duct, is often complicated by infection. Mostly observed in immunocompromised patients with bacteremia Methicillin-resistant Staphylococcus aureus (MRSA) is not typically associated with this ailment. Here, we present a unique case of acute cholecystitis caused by MRSA in an immunocompetent patient without bacteremia or underlying disease. A male patient aged 59 years was admitted complaining of severe abdominal pain and nausea. Subsequent investigation confirmed acute calculous cholecystitis and thereafter, the patient underwent laparoscopic cholecystectomy. Gallbladder fluid culture indicated elevated quantities of MRSA growths, and suitable antimicrobial therapy was given as part of the treatment process. This exceptional case underlines the significance of recognizing MRSA as a potential pathogen in severe acute cholecystitis cases, particularly those with severe symptoms. Rapid identification and usage of anti-MRSA antibiotics play a crucial role in managing MRSA-related situations. Healthcare providers need to bear in mind the possibility of cholecystitis associated with MRSA particularly when conventional risk factors are not present. Timely intervention is essential for favorable patient outcomes.

A fatal case of persistent bacteremia and acute cholecystitis caused by Staphylococcus aureus: A case report

Biliary tract infections caused by Staphylococcus aureus are rare. Here, we describe a case of fatal acute cholecystitis and persistent bacteremia caused by S. aureus in a patient with newly diagnosed diabetes mellitus. Staphylococcus aureus can cause bacteremic biliary tract infections, which are associated with higher mortality rates compared to biliary Klebsiella pneumoniae bacteremia. Early aggressive treatment and consultations with infectious disease specialists are recommended when biliary S. aureus bacteremia is clinically suspected.

Clinical characteristics and outcomes of Staphylococcus aureus bacteremia from a biliary source

Staphylococcus aureus is a virulent gram-positive organism, which rarely involves the biliary tract. This study aimed to analyze the clinical characteristics and outcomes of S. aureus bacteremia (SAB) originating from the biliary tract by comparing them with those of catheter-related SAB and biliary Klebsiella pneumoniae bacteremia. A matched case-control study within a prospective observational cohort of patients with SAB was conducted. Biliary SAB was defined as the isolation of S. aureus from blood cultures with symptoms and signs of biliary infection. Biliary SAB patients were matched (1:3) with the control groups: patients with catheter-related SAB and biliary Klebsiella pneumoniae bacteremia. Out of 1818 patients with SAB enrolled in the cohort, 42 (2%) had biliary SAB. Majority of these patients had solid tumors involving the pancreaticobiliary tract or liver, biliary drainage stent, and/or recent broad-spectrum antibiotic exposure. Patients with biliary SAB were more likely to have community-onset SAB, solid tumors, and lower APACHE II score than those with catheter-related SAB. They were less likely to have community-acquired infection and solid tumors and more likely to have lower Charlson comorbidity index and higher APACHE II score as compared with biliary K. pneumoniae bacteremia. The 12-week mortality in the biliary SAB group was higher than those in other control groups (60% vs. 20% and 14%). After adjusting for confounding factors, biliary SAB was independently associated with higher mortality. Biliary SAB is relatively rare. When it is clinically suspected, early aggressive treatment should be considered due to high mortality.

Persistent bacteraemia caused by Staphylococcus aureus in the gall bladder

Staphylococcus aureusbacteraemia (SAB) remains a complex disease with a high associated morbidity and mortality, especially when it is able to establish an occult nidus safe from antimicrobial eradication. Without rapid identification and intervention, the nidus can cause persistent relapse of disease, morbidity and mortality. Having a high clinical suspicion for the foci of occult S. aureus is important, and awareness of potential sites of infection is critical and can be life-saving.We present a unique case of a 65-year-old man with end-stage renal disease receiving haemodialysis who developed septic shock from SAB. Despite 18 days of appropriate antibiotics, the patient had persistent high-grade bacteraemia until his gall bladder was ultimately percutaneously drained. The day after drainage, he cleared his blood cultures, although he ultimately passed away as he decided to transition his care to focus on comfort measures.

Role of cytosolic and calcium independent phospholipases A(2) in insulin secretion impairment of INS-1E cells infected by S. aureus

Cytosolic PLA2 (cPLA2) and Ca(2+)-independent PLA2 (iPLA2) play a significant role in insulin β-cells secretion. Bacterial infections may be responsible of the onset of diabetes. The mechanism by which Staphylococcus aureus infection of INS-1 cells alters glucose-induced insulin secretion has been examined. After acute infection, insulin secretion and PLA2 activities significantly increased. Moreover, increased expressions of phospho-cPLA2, phospho-PKCα and phospho-ERK 1/2 were observed. Chronic infection causes a decrease in insulin release and a significant increase of iPLA2 and COX-2 protein expression. Moreover, insulin secretion in infected cells could be restored using specific siRNAs against iPLA2 isoform and specific COX-2 inhibitor.

Successful treatment of methicillin-resistant Staphylococcus aureus bacteraemia and cholecystitis

Although Staphylococcus aureus can cause a variety of infections, involvement of the biliary tract is rare. We present a middle-aged Caucasian woman who presented with methicillin-resistant S aureus (MRSA) bacteraemia. Subsequent investigation revealed a diagnosis of acute cholecystitis with MRSA-positive specimen cultures. The patient showed clinical improvement after vancomycin therapy and laparoscopic cholecystectomy. This case adds to the growing list of infections that can be attributed to MRSA.