Actinomycotic endocarditis of the eustachian valve: a rare case and a review of the literature

Brain abscess caused by Actinomyces turicensis in a non-immunocompromised adult patient: a case report and systematic review of the literature

BACKGROUND

Actinomyces turicensis is rarely responsible of clinically relevant infections in human. Infection is often misdiagnosed as malignancy, tuberculosis, or nocardiosis, therefore delaying the correct identification and treatment. Here we report a case of a 55-year-old immunocompetent adult with brain abscess caused by A. turicensis. A systematic review of A. turicensis infections was performed.

METHODS

A systematic review of the literature was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The databases MEDLINE, Embase, Web of Science, CINAHL, Clinicaltrials.gov and Canadian Agency for Drugs and Technology in Health (CADTH) were searched for all relevant literature.

RESULTS

Search identified 47 eligible records, for a total of 67 patients. A. turicensis infection was most frequently reported in the anogenital area (n = 21), causing acute bacterial skin and skin structure infections (ABSSSI) including Fournier's gangrene (n = 12), pulmonary infections (n = 8), gynecological infections (n = 6), cervicofacial district infections (n = 5), intrabdominal or breast infections (n = 8), urinary tract infections (n = 3), vertebral column infections (n = 2) central nervous system infections (n = 2), endocarditis (n = 1). Infections were mostly presenting as abscesses (n = 36), with or without concomitant bacteremia (n = 7). Fever and local signs of inflammation were present in over 60% of the cases. Treatment usually involved surgical drainage followed by antibiotic therapy (n = 51). Antimicrobial treatments most frequently included amoxicillin (+clavulanate), ampicillin/sulbactam, metronidazole or cephalosporins. Eighty-nine percent of the patients underwent a full recovery. Two fatal cases were reported.

CONCLUSIONS

To the best of our knowledge, we hereby present the first case of a brain abscess caused by A. turicensis and P. mirabilis. Brain involvement by A. turicensis is rare and may result from hematogenous spread or by dissemination of a contiguous infection. The infection might be difficult to diagnose and therefore treatment may be delayed. Nevertheless, the pathogen is often readily treatable. Diagnosis of actinomycosis is challenging and requires prompt microbiological identification. Surgical excision and drainage and antibiotic treatment usually allow for full recovery.

Infective endocarditis by Actinomyces species: a systematic review

Actinomycosis, is a slowly progressive infection that may mimic malignancy due to the invasiveness of tissues and the ability to form sinus tracts. Infective Endocarditis (IE) is a rare disease with significant morbidity and mortality. Interestingly, even though there are scarce data of IE by Actinomyces spp. in the literature, a review adequately summarizing all available evidence on the topic in a systematic way is lacking. The aim of this study was to systematically review all cases of IE by Actinomyces spp. in the literature and describe the epidemiology, microbiology, clinical characteristics, treatment and outcomes of this infection. A systematic review of PubMed, Scopus and Cochrane library (through 19 August 2021) for studies providing epidemiological, clinical, microbiological as well as treatment data and outcomes of IE by Actinomyces spp. was performed. A total of 31 studies providing data for 31 patients were included. A prosthetic valve was present in 12.9%, while the most common microorganism was A. meyeri. Aortic valve was the most commonly infected intracardiac site, followed by the mitral valve. Diagnosis was most commonly performed with transesophageal echocardiography, while the diagnosis was made at autopsy in 16.1%. Penicillin, cephalosporins and aminopenicillins were the most commonly used antimicrobials. Clinical cure was noted in 80.6%, while mortality was 19.4%. Development of heart failure was associated with mortality by IE. This systematic review thoroughly describes IE by Actinomyces and provides information on epidemiology, clinical presentation, treatment and outcomes.

Eustachian and Tricuspid Valve Endocarditis: A Rare Consequence of the Automatic Implantable Cardioverter-Defibrillator Placement

Eustachian valve (EV) is usually a rudimentary structure in adults. It is an embryological remnant of sinus venosus that directs oxygenated blood from the inferior vena cava across the foramen ovale and into the left atrium. Intravenous drug use is most commonly associated with infective endocarditis of the right-sided heart structures. Other documented causes of such an occurrence are intracardiac devices like pacemakers and central venous catheters. Patients presenting with concerns of infection and embolic phenomenon should promptly undergo evaluation for infective endocarditis. Although an embryological remnant, the eustachian valve normally regresses after birth, except in a minority of the patients, it persists as a vestigial structure. Here we present an unusual case involving infective endocarditis of the eustachian valve and tricuspid valve both in a patient with recent automatic implantable cardioverter-defibrillator (AICD) placement and history of IV drug abuse and its systemic consequences in a patient with patent foramen ovale.

Actinomyces turicensis parapharyngeal space infection in an immunocompetent host: first case report and review of literature

Actinomyces are common commensals of the oral cavity, gastrointestinal tract and urogenital tract. They are anaerobic, Gram-positive, non-acid-fast bacilli, which can cause invasive infection and abscesses. We present the first reported case of supraglottitis and deep neck space abscess formation secondary to Actinomyces turicensis infection. The patient was managed with intravenous antibiotics, incision and drainage of a left parapharyngeal abscess and subsequent mediastinal abscess. After 6 weeks in hospital, the patient was successfully discharged to complete a 6-month course of oral amoxicillin.

Extended spectrum beta lactamase producing Escherichia coli eustachian valve infective endocarditis

Endocarditis is an infection of the endocardium caused by a multitude of bacteria, including S. aureus, viridans streptococci, S. bovis, or S. epidermidis, among others. It can cause a variety of physical findings, including new onset murmur, Osler nodes, and Janeway lesions. Endocarditis is diagnosed with multiple positive blood cultures with transesophageal echocardiogram (TEE) showing valvular vegetations. In this article, we present a 47 year old female with a history of ESRD on dialysis who presented with a bleeding fistula found to be in septic shock. Diagnosis of eustachian valve endocarditis with E. Coli ESBL was made through positive blood cultures as well as using TEE. She was started on IV meropenem for seven days, to which the patient completed and eventually was discharged home with resolution of symptoms.

Bacterial Endocarditis Caused by Actinomyces oris: First Reported Case and Literature Review

Actinomyces species are gram-positive, facultative anaerobic bacilli. Infection caused by Actinomyces species is usually limited to cervicofacial, thoracic, and abdominopelvic regions. Infective endocarditis due to Actinomyces species is extremely rare with only 30 reported cases since 1939. We report a case of Actinomyces oris endocarditis in a 14-year-old boy who had a 2-week history of dyspnea on exertion without other constitutional signs. Transthoracic echocardiography was suggestive of perforation of the right coronary cusp of aortic valve. No organisms were isolated from blood cultures. The patient underwent surgical valve repair due to deteriorated cardiac function. Valve tissue culture did not initially identify the organism. However, the terminal subculture in a thioglycolate broth grew gram-positive bacilli. The matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) was compatible with Actinomyces oris. After 6 weeks of intravenous ampicillin, the patient remained well with improved cardiac function. We reviewed all reported cases of infective endocarditis caused by Actinomyces species, commenting on clinical characteristics and factors associated with unfavorable outcomes in infective endocarditis due to Actinomyces species. Although infective endocarditis caused by Actinomyces spp is rare, it could be considered in a case of culture-negative endocarditis since the clinical features might be indistinguishable from other bacterial endocarditis. Additionally, MALDI-TOF MS is a useful diagnostic tool for the identification of Actinomyces spp to improve the accuracy of diagnosis.

Percutaneous coronary intervention-associated Actinomyces oris

Coronary artery interventions are safe procedures yet have a risk of stent infection, bacteremia and sepsis, events that are rare but with high morbidity and mortality sequel. A few prior cases had reported post percutaneous coronary intervention (PCI) infections, abscesses and sepsis due to Staphylococcus aureus, followed by Pseudomonas aeruginosa. Cardiac Actinomyces infections are extremely rare. Here we report a case of a 50 year old patient who developed a post intervention Actinomyces oris epicardial abscess occluding right coronary artery with subsequent bacteremia eventually requiring open heart surgery. He was treated during and thereafter with IV penicillin and ceftriaxone for almost 8 weeks. We highlight during this review the available literature regarding risk factors, the possible theories of acquiring such bacterium at this unusual site as well as our patient's course and treatment outcome.

Eustachian valve endocarditis: a case report on an under diagnosed entity

Patients presenting with bacteremia and the presence of multiple infected emboli sites should be promptly investigated for heart valve endocarditis as the possible culprit. We present a case of Eustachian valve endocarditis secondary to multiple abdominal surgeries to highlight not only the importance of recognizing risks factors, other than intravenous drug use, in the pathogenesis of right sided endocarditis, but also to illustrate the significance of systematically interrogating all the heart valves, including the Eustachian valve during echocardiography.

Actinomyces turicensis: An unusual cause of cervicofacial actinomycosis presenting as ludwig angina in an immunocompromised host - Case report and literature review

Actinomyces is an anaerobic, gram-positive bacillus that is known to cause chronic granulomatous infections. Common risk factors predisposing patients to this life-threatening infection are recent dental procedures, immunosuppression from malignancy, or history of smoking and alcohol use. Actinomyces, commonly found in the normal flora of the oral cavity, is one of the pathogens that can cause Ludwig’s angina. Ludwig's angina is diffuse cellulitis and edema of the soft tissues of the neck and floor of the mouth. Cervicofacial actinomyces is an invasive infection that can form life-threatening abscesses through its rapid spread. Actinomyces turicensis is an isolate that has emerged recently to cause infections in humans. There are few reported cases of this species causing abdominal and genital infections; however, there is no report of it invading the cervicofacial space. A feared complication of Ludwig’s angina and cervicofacial actinomyces is airway compromise. Therefore, prompt initiation of intravenous antibiotics is required for the treatment and prevention of deadly complications. We present a patient with left-sided neck swelling after a recent oral surgical procedure and was found to grow Actinomyces turicensis on wound culture. The patient was treated with intravenous ampicillin-sulbactam, which not only decreased the swelling but improved the necrotic appearance of his abscess wound.

A case report of eustachian valve endocarditis due to Salmonella typhimurium in an AIDS patient

Introduction

The eustachian valve is a normal remnant of the right valve of the sinus venosus, which directs blood in the embryo life from the inferior vena cava into the left atrium through the foramen ovale.

Case report

We report a case of eustachian valve endocarditis (EVE) secondary to Salmonella typhimurium in a patient with acquired immunodeficiency syndrome (AIDS). The patient also had concomitant Pneumocystis pneumonia.

Discussion

Salmonella bacteremia is one of the AIDS-defining illnesses, and many patients will have recurrent episodes. Salmonella endocarditis on the other hand is rare, but when present, it has a significant morbidity and mortality. EVE rarely requires surgical intervention, and the appropriate antibiotics are the treatment of choice.

Conclusions

We recommend clinicians to consider obtaining an echocardiography in AIDS patients with Salmonella bacteremia to search for possible endocarditis, as it does change the treatment plan.

Actinomyces neuii: a case report of a rare cause of acute infective endocarditis and literature review

BACKGROUND

Infective endocarditis caused by Actinomyces spp. is extremely rare. However, cases by new species of Actinomyces have been increasingly reported due to advances in laboratory techniques, and many of these species do not cause classic presentations of actinomycosis. Actinomyces neuii is reported to have a tendency to cause endovascular infection. The course of infective endocarditis caused by Actinomyces spp. is usually indolent.

CASE PRESENTATION

A 61-year-old man with history of infective endocarditis, end stage renal disease, and monoclonal gammopathy was admitted for an abrupt fever, confusion, dysarthria, and facial droop after hemodialysis. Echocardiogram showed vegetations on both the aortic and mitral valves. Two sets of blood culture grew A. neuii. Brain MRI showed multiple bilateral cerebral infarcts consistent with septic emboli. The patient recovered after valvular surgery and prolonged intravenous and oral antibiotic therapy.

CONCLUSIONS

This case illustrates an unusually acute presentation of A. neuii infective endocarditis. As with other Gram-positive bacilli, Actinomyces spp. isolates are often regarded as a result of contamination. One should keep it in mind as a cause of infective endocarditis in vulnerable patient populations.

Eustachian valve infective endocarditis

A 40-year-old woman presented with postoperative fever. Echocardiography revealed a large pedunculated cauliflower right atrial mass of heterogeneous echogenicity attached to the eustachian valve measuring about 2×3 cm. She underwent surgical excision, gross and microscopical examination were consistent with eustachian valve infective endocarditis.

Drinking alcohol is associated with variation in the human oral microbiome in a large study of American adults

BACKGROUND

Dysbiosis of the oral microbiome can lead to local oral disease and potentially to cancers of the head, neck, and digestive tract. However, little is known regarding exogenous factors contributing to such microbial imbalance.

RESULTS

We examined the impact of alcohol consumption on the oral microbiome in a cross-sectional study of 1044 US adults. Bacterial 16S rRNA genes from oral wash samples were amplified, sequenced, and assigned to bacterial taxa. We tested the association of alcohol drinking level (non-drinker, moderate drinker, or heavy drinker) and type (liquor, beer, or wine) with overall microbial composition and individual taxon abundance. The diversity of oral microbiota and overall bacterial profiles differed between heavy drinkers and non-drinkers (α-diversity richness p = 0.0059 and β-diversity unweighted UniFrac p = 0.0036), and abundance of commensal order Lactobacillales tends to be decreased with higher alcohol consumption (fold changes = 0.89 and 0.94 for heavy and moderate drinkers, p trend = 0.005 [q = 0.064]). Additionally, certain genera were enriched in subjects with higher alcohol consumption, including Actinomyces, Leptotrichia, Cardiobacterium, and Neisseria; some of these genera contain oral pathogens, while Neisseria can synthesize the human carcinogen acetaldehyde from ethanol. Wine drinkers may differ from non-drinkers in microbial diversity and profiles (α-diversity richness p = 0.048 and β-diversity unweighted UniFrac p = 0.059) after controlling for drinking amount, while liquor and beer drinkers did not. All significant differences between drinkers and non-drinkers remained after exclusion of current smokers.

CONCLUSIONS

Our results, from a large human study of alcohol consumption and the oral microbiome, indicate that alcohol consumption, and heavy drinking in particular, may influence the oral microbiome composition. These findings may have implications for better understanding the potential role that oral bacteria play in alcohol-related diseases.

Eustachian Valve Endocarditis: Echocardiographic Diagnosis in a Critical Care Patient

Eustachian valve endocarditis is rare. A literature review revealed that only 29 cases have been reported and, among them, there is only one mention of an intensive care unit (ICU) admission. We present an 82-year-old man without previous medical records who presented with septic shock with multiple organ dysfunction. The patient was admitted to the ICU and deteriorated with combined shock (septic + cardiogenic). A second ultrasound screen detected a prominent Eustachian valve with mobile multilobulated vegetation attached. Transesophageal echocardiography confirmed a 12 mm oscillating mass attached to a visible Eustachian valve.

Hemolytic anemia due to native valve subacute endocarditis with Actinomyces israelii infection

This case highlights the importance of considering infectious etiology in the management of hemolytic anemia. Hemolytic anemia associated with infectious endocarditis is rare. Actinomyces endocarditis is a rare occurrence and is very challenging to diagnose given the challenges to culture the organism.

Echocardiography in Infective Endocarditis: State of the Art

PURPOSE OF REVIEW

In this review, we examine the central role of echocardiography in the diagnosis, prognosis, and management of infective endocarditis (IE).

RECENT FINDINGS

2D transthoracic echocardiography (TTE) and transesophageal echocardiography TEE have complementary roles and are unequivocally the mainstay of diagnostic imaging in IE. The advent of 3D and multiplanar imaging have greatly enhanced the ability of the imager to evaluate cardiac structure and function. Technologic advances in 3D imaging allow for the reconstruction of realistic anatomic images that in turn have positively impacted IE-related surgical planning and intervention. CT and metabolic imaging appear to be emerging as promising ancillary diagnostic tools that could be deployed in select scenarios to circumvent some of the limitations of echocardiography. Our review summarizes the indispensable and central role of various echocardiographic modalities in the management of infective endocarditis. The complementary role of 2D TTE and TEE are discussed and areas where 3D TEE offers incremental value highlighted. An algorithm summarizing a contemporary approach to the workup of endocarditis is provided and major societal guidelines for timing of surgery are reviewed.

Intrauterine device infection causing concomitant streptococcal toxic shock syndrome and pelvic abscess with Actinomyces odontolyticus bacteraemia

Intrauterine devices (IUDs) are rarely associated with serious infections. We report an unusual concomitant infection of group A Streptococcus (GAS) causing toxic shock syndrome and pelvic abscess with Actinomyces odontolyticus associated with an IUD in a healthy 50-year-old patient. The IUD was subsequently removed and the patient recovered on the appropriate antibiotics. This case highlights the importance of clinicians' high index of suspicion of an IUD infection and prompt removal of the infected foreign body to obtain source control.

Actinomyces naeslundii: An Uncommon Cause of Endocarditis

Actinomyces rarely causes endocarditis with 25 well-described cases reported in the literature in the past 75 years. We present a case of prosthetic valve endocarditis (PVE) caused by Actinomyces naeslundii. To our knowledge, this is the first report in the literature of endocarditis due to this organism and the second report of PVE caused by Actinomyces.