Neisseria meningitidis Isolated in Postmortem Vitreous Humor in a Death Due to Meningococcal Sepsis

Case Report: Post-mortem Histopathological and Molecular Analyses of the Very First Documented COVID-19-Related Death in Europe

In Europe, the first case of coronavirus disease (COVID-19) and the first COVID-19-related death were reported in France on January 24th and February 15th, 2020, respectively. Officially, the first case of COVID-19 infection in the Republic of Serbia was registered on March 6th. Herein, we presented the first case of retrospective detection of the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) in the post-mortem-obtained vitreous humor (VH), which took place on February 5th, 2020. This is the first death in Europe proven to be caused by COVID-19 by means of post-mortem histopathological and molecular analyses. Based on this finding, it appears that SARS-CoV-2 has been spreading faster and started spreading much earlier than it had been considered and that COVID-19 was probably the cause of the much-reported pneumonia of unknown origin in January and February 2020.

The importance of the postmortem interval for the diagnosis of Waterhouse-Friderichsen syndrome by Neisseria meningitidis in a series of forensic cases

The effective value of microbiological post-mortem examinations stands as fundamental in forensic cases involving microbiology. We ran these analyses on five victims, who suddenly died after showing persistent fever. The examinations were conducted between 48 hours and 10 days after death, and adrenal gland apoplexy was detected in all the cases.

Microbiological examinations identified Neisseria meningitidis, which was accountable for Waterhouse–Friderichsen syndrome. Diplococci were isolated from three cadavers that underwent forensic dissection between 2 and 3 days after death. The remaining two cadavers showed polymicrobial contamination, and a polymerase chain reaction technique was necessary to identify the pathogen.

We assumed that the microbial overlap could lead to diagnostic mistakes and conceal the identification of the lethal pathogen. Therefore, we suggest using molecular techniques for a postmortem interval (PMI) longer than 72 hours. Classical microbiological examination should be performed for PMI within 72 hours.

Rapid Streptococcus Pneumonia Antigen Detection on Postmortem Urine in a Death Due to Pneumococcal Meningitis

Streptococcus pneumoniae is the leading cause of adult bacterial meningitis. Differing from Neisseria meningitidis (the second most common cause of acute bacterial meningitis), contact tracing and chemoprophylaxis are not required. At postmortem, the differentiation between S. pneumoniae and N. meningitidis is traditionally done by culture and polymerase chain reaction performed on blood or cerebrospinal fluid, but may take hours, if not days, to analyze. We present a death from bacterial meningitis in a 73-year-old woman in which a rapid urinary pneumococcal antigen testing was able to identify S. pneumoniae as the causative organism within 1 hour. This was confirmed by subsequent brain swab culture. The rapid urinary pneumococcal antigen test in the case prevented the need for contact tracing and chemoprophylaxis. This case highlights the potential use of this test to rapidly identify the culprit organism at postmortem examination when acute bacterial meningitis is detected.

Neisseria meningitidis Isolated in Vitreous Humor in a 5-Month-Old Infant Death From Meningococcal Sepsis

Diagnosing sepsis at postmortem is challenging. With respect to meningococcal sepsis, the postmortem microbiological identification of Neisseria meningitidis is nearly always due to true infection, including in cases of decomposition. Previous case series and case reports were able to isolate N. meningitidis in vitreous humor in adult deaths from meningococcal sepsis when blood and/or cerebrospinal fluid was unavailable. It was suggested that vitreous humor polymerase chain reaction (PCR) may be useful in the diagnosis of meningococcal sepsis. We describe a fatal case of meningococcal sepsis in a 5-month-old infant where N. meningitidis was detected in vitreous humor, cerebrospinal fluid, and blood through PCR. The presented case report gives further evidence in the potential use of vitreous PCR analysis in suspected meningococcal sepsis, particularly in the pediatric population.

Post-mortem microbiology in sudden death: sampling protocols proposed in different clinical settings

BACKGROUND

Autopsies, including minimally invasive autopsies, are a powerful tool for determination of the cause of death. When a patient dies from an infection, microbiology is crucial to identify the causative organism. Post-mortem microbiology (PMM) aims to detect unexpected infections causing sudden deaths; confirm clinically suspected but unproven infection; evaluate the efficacy of antimicrobial therapy; identify emergent pathogens; and recognize medical errors. Additionally, the analysis of the thanatomicrobiome may help to estimate the post-mortem interval.

AIMS

The aim was to provide advice in the collection of PMM samples and to propose sampling guidelines for microbiologists advising autopsy pathologists facing different sudden death scenarios.

SOURCES

A multidisciplinary team with experts in various fields of microbiology and autopsies on behalf of the ESGFOR (ESCMID - European Society of Clinical Microbiology and Infectious Diseases - study group of forensic and post-mortem microbiology and in collaboration with the European Society of Pathology) developed this narrative review based on a literature search using MedLine and Scopus electronic databases supplemented with their own expertise.

CONTENT

These guidelines address measures to prevent sample contamination in autopsy microbiology; general PMM sampling technique; protocols for PMM sampling in different scenarios and using minimally invasive autopsy; and potential use of the evolving post-mortem microbiome to estimate the post-mortem interval.

IMPLICATIONS

Adequate sampling is paramount to identify the causative organism. Meaningful interpretation of PMM results requires careful evaluation in the context of clinical history, macroscopic and histological findings. Networking and closer collaboration among microbiologists and autopsy pathologists is vital to maximize the yield of PMM.

Neck injury and conjunctival petechiae in a woman who underwent cardiopulmonary resuscitation and subsequently died from meningococcal sepsis

Cardiopulmonary resuscitation (CPR) can create a range of unusual lesions and injuries, which may complicate forensic evaluation. Although potentially sinister findings, neck injury and conjunctival petechiae may also be seen in patients who have undergone CPR. We report a case of an individual with subcutaneous bruising and hemorrhage in the deep structures of the neck and florid conjunctival petechiae at autopsy that can be explained by cardiopulmonary resuscitation and meningococcal sepsis.