Cervical necrotizing fasciitis: Report of 6 cases and review of literature

Vacuum-assisted closure of a tissue deficit of the submental area in a patient with a necrotizing soft tissue odontogenic infection

Odontogenic infections can rarely progress to necrotizing soft tissue infections. Cervical necrotizing fasciitis (CNF) is a rare but fulminant infection that spreads along the fascial planes, including connective tissue, muscle, and subcutaneous fat, and is typified by necrosis of the skin and other adjacent tissues. This article aims to present the treatment of a patient with submental skin and soft tissue necrosis due to an odontogenic infection and the subsequent management of the tissue deficit with a vacuum-assisted closure (VAC) system. The patient presented with extensive skin necrosis in the submental area and was immediately hospitalized, and management of the odontogenic infection was performed. When the patients' infection had been sufficiently controlled, a wound VAC device was placed in the deficit. The VAC device was removed after 12 days, and the patient was discharged. In conclusion, VAC can be used to manage tissue deficits with good aesthetic results.

Cervical Necrotizing Fasciitis: A Surgical Outcome Analysis

Cervical necrotizing fasciitis is an immensely progressive, difficult-to-diagnose soft tissue infection of the fascial planes, skin, and subcutaneous tissue. It has marked morbidity and mortality. In this case report, we analyzed the risk factors, laboratory indices, and treatment modalities that affect the outcome of this fatal disease. This is a retrospective case series of cases admitted within a short span of six months between January and June 23. The cases were followed up monthly for three months, and the diagnosis was made on a clinical, pathological, radiological, and histopathological basis. All the cases were managed with neck exploration and aggressive surgical debridement in an emergency department, dressing of the wound with hydrogen peroxide and betadine twice daily, triple broad-spectrum antibiotic therapy for polymicrobial infection, and tight glycemic control. There were no complications, and all the patients survived. We report our cases of cervical necrotizing fasciitis that had similar presentations but varied outcomes. Here, we would like to advocate the importance of immediate management in the form of neck exploration and debridement at the earliest after the diagnosis has been established. Hyperglycemia should be brought under control, and daily aseptic dressing with removal of the slough and source of infection would greatly affect the outcome of this deadly disease.

Cervical Necrotizing Fasciitis: An Institutional Experience

Introduction Cervical necrotizing fasciitis is an acute, progressive, and rapidly spreading soft tissue infection affecting the fascial planes of the head and neck region. It has high morbidity and mortality rate. In this study, we have reviewed cervical necrotizing fasciitis cases treated in our department and analyzed the various risk factors, laboratory indices, and treatment modalities that affect the prognosis of this deadly disease. Design and method This is a retrospective review. We have reviewed the medical records and charts of seven patients hospitalized in our institute with the diagnosis of cervical necrotizing fasciitis between 2015 and 2019. Results Of the seven patients, six were male and one was female. The mean age was 49.8 years (range: 38-70 years). Etiology was found to be odontogenic infection in five (71%) cases. The presenting feature in all cases was tender cervical swelling. Intraoperatively, the submandibular triangle was found to be involved in all cases (100%) followed by the carotid triangle in five (71%) cases and the submental triangle in three (42%) cases. The most common comorbidities associated with cervical necrotizing fasciitis were found to be uncontrolled diabetes mellitus and anemia. All patients underwent emergency aggressive surgical debridement and culture-directed broad-spectrum antibiotics (100%). Additional procedures in the form of tracheostomy were required in two (28%) cases and skin grafting in two (28%) cases. One patient in our series developed sepsis with descending mediastinitis. The average hospital stay was 27 days. All the patients survived with no mortality. Conclusion Cervical necrotizing fasciitis should be diagnosed early. Early initiation of broad-spectrum antibiotics and aggressive surgical debridement are the two key management strategies that can improve survival. Strict glycemic control and correction of anemia result in a favorable outcome.

[Hyperbaric oxygen therapy : Selected indications in the discipline of otorhinolaryngology]

Hyperbaric oxygenation (HBO) represents the controlled exposure to positive pressure with simultaneous inhalation of pure oxygen. It is considered to be an effective treatment option for diseases with restricted blood flow as oxygen not only binds chemically to hemoglobin but also physically dissolves in blood plasma. With the help of a hyperbaric chamber the ambient pressure of a patient can be modified and the physiological characteristics in positive pressure can be medically used. The indications relevant to otorhinolaryngology are necrotizing otitis externa and skull base osteomyelitis, other forms of osteomyelitis, gangrene, wound healing disorders and sudden loss of hearing. When choosing a treatment, not only the availability and costs of HBO treatment play a role but also the patient's tolerance of overpressure. The risks of treatment, e.g., due to oxygen toxicity or barotrauma of the middle ear or the paranasal sinuses, must be weighed up against the potential benefits.

Pseudomonas aeruginosa as a culprit of cervical necrotizing fasciitis: A case report

Introduction and importance

Necrotizing fasciitis is usually a polymicrobial infection and odontogenic source is usually the foci for infection in the neck region. Cervical necrotizing fasciitis due to Pseudomonas is a rare and potentially fatal complication in diabetic patients. The study highlights the importance of early intervention to improve the outcome of the patient.

Case presentation

We report a case of a 48-year female who presented with neck pain for 10 days. On further investigations, she had diabetic ketoacidosis, and a culture of the wound showed Pseudomonas. With appropriate antibiotics and surgical intervention, her condition gradually improved.

Clinical discussion

Necrotizing fasciitis in the neck region with Pseudomonas without odontogenic infections is a rare occurrence. Early medical and surgical intervention leads to a better outcome. The location of the infection and its extensions can affect the prognosis.

Conclusion

Physicians should be aware of cervical necrotizing fasciitis as a complication in diabetic ketoacidosis and install early treatment to improve survivability and the outcome.

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The hallmark of necrotizing fasciitis is the extensive necrosis of subcutaneous tissue and underlying fascia.

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Cervical necrotizing fasciitis without contiguous spread is a rare occurrence.

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Early surgical intervention can lead to better outcome of the patient.

Cavernous Sinus Involvement and Near Miss Mediastinitis following Mandibular Tooth Infection Treated during the COVID-19 Pandemic: Clinical Diagnosis and Treatment

Odontogenic infections represent a frequent condition that in some cases, if not treated promptly, can spread quickly to the rest of the body and turn into life-threatening infections. In this work, the case is reported of a 59-year-old woman, diabetic and overweight, who presented to the Odontostomatology and Otolaryngology Section of the Policlinic of Bari with mandibular tooth infection that had developed into a deep neck space infection leading to the involvement of cavernous sinuses and near mediastinum. The diagnosis, the surgical drainage of the phlegmon and removal of infection foci, appropriate control of the airways, and a correct antibiotic therapy made it possible to avoid a potentially fatal condition. Prompt management and early diagnosis of deep space neck infections, such as phlegmon and/or necrotizing fasciitis, with the auxilium of CT scans and tools such as LRINEC (Laboratory Risk Indicator for Necrotizing Fasciitis), NLR (Neutrophil-to-Lymphocyte Ratio), and LRINECxNLR scores (Laboratory Risk Indicator for Necrotizing Fasciitis and Neutrophil to Lymphocyte Ratio), are advised to evade delays and complications that could potentially worsen the patient’s outcome.

Synchronous cervical necrotizing fasciitis and pharyngocutaneous fistula: A case report

Introduction and importance

Necrotizing fasciitis is a fulminant infection that spreads along the fascial planes. It is a rare entity with potentially fatal outcomes. The head and neck involvement is infrequent, with primary source either odontogenic or pharyngeal infection by single or mixed bacterial flora. To our knowledge, synchronous cervical necrotizing fasciitis (CNF) and pharyngocutaneous fistula is rarely reported in pieces of literature.

Case presentation

We present a 38-years-old female patient who presented with CNF and pharyngocutaneous fistula. Diabetes mellitus was accidentally discovered during the investigation. The patient was successfully treated with broad-spectrum antibiotics, serial surgical debridement sessions, wound irrigation, and multiple muscular and myocutaneous skin flaps.

Clinical discussion

Rapid diagnosis, radical surgical debridement of all necrotic tissue, intravenous broad-spectrum antibiotics, and close monitoring of patients with CNF are crucial to avoid critical complications and better patient survival. Due to the poor healing process in the neck area, the pharyngocutaneous fistula should be repaired with good musculocutaneous flaps such as the pectoralis major myocutaneous flap. Meticulous suturing of the flap to the mucosa, reinforcement of the repair with muscle, and suturing of the skin without tension are essential to obtaining a successful outcome.

Conclusion

Synchronous CNF and pharyngocutaneous fistula are rare events. Initial diagnosis and serial surgical debridement, along with aggressive broad-spectrum antibiotics and adequate resuscitation with great attention to the poor healing process in the diabetic patients' neck area, are critical for a beneficial result. In our case, the reconstruction was performed successfully using multiple muscular and skin flaps.

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Cervical necrotizing fasciitis (CNF) is a fetal infection with a high mortality rate even under ideal medical conditions.

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Synchronous CNF and pharyngocutaneous fistula are rare occurrence.

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In CNF with pharyngocutaneous fistula, initial diagnosis, surgical debridement, broad-spectrum antibiotics and resuscitation with attention to poor healing process, are critical for a beneficial result.

Factors Affecting Patients with Concurrent Deep Neck Infection and Cervical Necrotizing Fasciitis

Deep neck infection (DNI) is a severe disease of the deep neck spaces, which has the potential for airway obstruction. Cervical necrotizing fasciitis (CNF) is a fatal infection of the diffuse soft tissues and fascia with a high mortality rate. This study investigated risk factors in patients with concurrent DNI and CNF. A total of 556 patients with DNI were included in this study between August 2016 and December 2021. Among these patients, 31 had concurrent DNI and CNF. The relevant clinical variables were assessed. In univariate analysis, age (> 60 years, odds ratio (OR) = 2.491, p = 0.014), C-reactive protein (CRP, OR = 1.007, p < 0.001), blood sugar (OR = 1.007, p < 0.001), and diabetes mellitus (DM, OR = 4.017, p < 0.001) were significant risk factors for concurrent DNI and CNF. In multivariate analysis, CRP (OR = 1.006, p < 0.001) and blood sugar (OR = 1.006, p = 0.002) were independent risk factors in patients with concurrent DNI and CNF. There were significant differences in the length of hospital stay and therapeutic management (intubation, tracheostomy, incision and drainage) between DNI patients with and without CNF (all p < 0.05). While there were no differences in pathogens between the DNI alone and concurrent DNI and CNF groups (all p > 0.05), the rate of specific pathogen non-growth from blood cultures was 16.95% (89/525) in the DNI alone group, in contrast to 0% (0/31) in the concurrent DNI and CNF group (p = 0.008). Higher CRP and blood sugar levels were independent risk factors for the concurrence of DNI and CNF. With regard to prognosis, there were significant differences in the length of hospital stay and therapeutic management between the groups with and without CNF. While there were no significant differences in pathogens (all p > 0.05), no cases in the concurrent DNI and CNF group showed specific pathogen non-growth, in contrast to 89/525 patients in the group with DNI alone.

New laboratory predictive tools in deep neck space infections

Introduction

Deep neck space infections (DNSIs) are a group of infective suppurative diseases involving deep neck spaces and cervical fascia. Necrotising and septic evolutions are rare, but severe complications can dramatically affect the prognosis and should be promptly managed. Clinical examination often has low sensitivity, although instrumental diagnosis may delay te treatment. We investigated two laboratory tools, LRINEC (Laboratory Risk Indicator for the Necrotizing fasciitis) and NLR (neutrophil to lymphocyte ratio), in the expectation to find a rapidly available predictive indicator that may help in distinguishing necrotising complications and/or systemic septic involvement.

Methods

A retrospective observational cohort study was performed on 118 patients who had underwent surgical treatment for DNSIs at our Surgical Unit. LRINEC, NLR and the product LRINEC x NLR were calculated.

Results

Statistical analysis showed that these scores may have utility in rapidly predicting the risk of necrotising fasciitis and systemic involvement at an early diagnostic stage.

Conclusions

Further studies with a larger cohort may be necessary in order to increase the sensitivity and specificity.

Comparison of death and survival cervical necrotizing fasciits cases

BACKGROUND

Cervical Necrotizing Fasciitis (CNF) is associated with a high mortality rate. The occurrence of mediastinitis with CNF may increase mortality up to 70%.

AIMS

We aimed to identify the differences between surviving and deceased cases.

METHODS

The present study was conducted retrospectively by scanning the files of 16 patients between the ages of 19-71 who were diagnosed with CNF. Patients were divided into two groups as the surviving patient group (SPG) and the deceased patient group (DPG). Both groups were compared in terms of age, gender, Laboratory Risk Indicator for Necrotizing Fasciitis (LRİNEC) score, duration of symptom onset to hospital admission, use of antibiotherapy prior to admission, duration of hospitalization, presence of diabetes mellitus (DM), presence of dental etiology, mediastinitis, and respiratory distress at the time of admission.

RESULTS

Diabetes mellitus was the most common comorbid disease. 5 out of 7 deceased patients had DM. Dental events were the most common etiology. Rapid surgical debridement and airway management was the first treatment method. The most frequently isolated species in the culture was Streptococcus. 6 of 11 patients who developed mediastinitis deceased at the end of the process.

CONCLUSION

Dental pathologies mostly play a role in the etiology. It is obvious that dentists, another occupational group that frequently encounters this patient group, have a critical role in this process. Therefore, precise attention should be given to dental problems in patients with diabetes, and hospitalization and initiation of broad-spectrum antibiotherapy should be considered in case of suspicion of deep neck infection.

Early detecting cervical necrotizing fasciitis from deep neck infections: a study of 550 patients

PURPOSE

The aim of this retrospective review study is to evaluate Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) score as an indicative parameter in early detecting cervical necrotizing fasciitis (CNF) from deep neck infections (DNI).

METHODS

We reviewed 12 cases of CNF and 538 cases of non-necrotizing deep neck infection hospitalized in our hospital over the last decade. Cervical necrotizing fasciitis was histologically confirmed.

RESULTS

Using an LRINEC score of 6 as a cutoff sensitivity was calculated at 100% (95% CI 99.9-100) and specificity 72.5% (95% CI 72.4-72.6). Negative predicted value (NPV) was 100% and positive predicted value (PPV) was 7.5%. C-reactive protein (CRP), white blood count (WBC), and glucose (Glu) levels have a higher correlation. Haemoglobin (Hb), sodium (Na), and creatinine (Cr) do not seem to have a big impact in our study.

CONCLUSION

LRINEC score proves to be a useful "rule-out" tool that works on the safe side with high sensitivity and poor specificity. WBC, CRP, and Glu seem to be the most significant variables of the LRINEC score. Hb, Na, and Cr make the score safer. Decision for surgery must be based on medical history, clinical symptoms and signs, imaging findings, and laboratory tests and not according to the LRINEC score itself.

Cervical necrotizing fasciitis affects only immunocompromized patients? Diagnostic challenges, treatment outcomes and clinical management of eleven immunocompetent adult patients with a still fatal disease

PURPOSE

Cervical Necrotizing fasciitis (CNF) has been reported as an unusual rapidly progressive, life-threatening, inflammatory disease that is known to affect predominately immunocompromised patients. Few case reports have been sporadically published involving immunocompetent adults. This is the first study presents a series of immunocompetent CNF patients.

MATERIALS AND METHODS

A retrospective chart review study was performed on immunocompetent adults with CNF from January 2003 to December 2019. The diagnosis was histologically confirmed. We analyzed epidemiological, clinical, laboratory and imaging findings and discussed them along with the treatment plan.

RESULTS

A total of eleven adult patients were included in the study. The average age was 43 years, ranging from 17 to 62 years. The average hospitalization time was 28 days, ranging from 10 to 129 days. All patients presented with cervical erythema and odynophagia. The causative factors are known in nine patients. Tissue cultures demonstrated mixed flora in six patients. Seven underwent a temporary tracheostomy. Wide neck exploration incisions were performed in all patients as the diagnosis was established after imaging findings. In nine cases the anterior-upper mediastinum was affected but only in two patients extension of the surgical planes to the mediastinum was performed. Four patients developed polyserositis. Nine patients survived and two developed multiorgan failure and died.

CONCLUSION

There seem to be no differences between immunocompetent and immunocompromised CNF patients, in regards to clinical, imaging and laboratory findings as well as their treatment plan.

Descending Necrotizing Mediastinitis: Analysis of 9 Cases in Our Hospital

OBJECTIVES

Descending necrotizing mediastinitis (DNM) is a serious and progressive infection involving the neck and chest and with high mortality if not treated quickly and properly. The aim of this study is to share our practices for managing this condition.

METHODS

We retrospectively evaluated 9 patients diagnosed with DNM in our hospital between January 2006 and October 2019. Age, gender, origin of infection, length of hospital stay, microorganisms present, type of surgical treatment, and clinical outcomes were reviewed.

RESULTS

All patients underwent surgery to drain neck and mediastinal secretions and collections. Three (33.3%) patients were treated with transcervical drainage alone, and 6 (66.7%) patients were treated with combined transcervical and transthoracic drainage. Reoperations were reported in 3 (33.3%) cases. The average length of hospital stay was 22.78 ± 10.05 days (range: 9-40 days). The average length of intensive care unit stay was 6.44 ± 10.10 days (range: 0-25 days). There were no in-hospital deaths, and all patients were discharged home with good outcomes.

CONCLUSIONS

To improve the prognosis of DNM, we suggest early and adequate debridement of all affected areas along with the proper use of antibiotics. A multidisciplinary approach involving both cardiothoracic and ENT surgeons is also required.

Cervical Necrotizing Fasciitis After Surgery of a Mandibular Fracture

INTRODUCTION

Cervical necrotizing fasciitis (CNF) is a rapid progressing and potentially fatal infection of connective tissues that spreads along the fascial planes. It commonly develops from odontogenic sources. In this article, the authors present a case of CNF which was developed after open reduction and internal fixation (ORIF) of a mandibular fracture.

CLINICAL CASE

A 19-year-old male patient with no past medical history was admitted due to a mandibular fracture. Following ORIF surgery, on third post-operative day, Physical examination revealed extensive cervical swelling extending from submandibular to suprasternal area, with tender and erythematous skin. Soon after confirmation of CNF diagnosis, surgical debridement and wide spectrum antibiotic therapy was performed. The residual soft tissue defect was reconstructed following infection subsidence.

CONCLUSION

Our study aims to highlight the risk of CNF development during postoperative period of a simple mandibular fracture ORIF surgery which is considered a routine maxillofacial procedure. Early detection and adequate emergency treatment including immediate surgical intervention are critical in the management of these patients.

Necrotising fasciitis or pyoderma gangrenosum: A fatal dilemma

Necrotising fasciitis (NF) is mostly a polymicrobial, severe soft tissue infection that progresses rapidly, penetrating through the subcutaneous tissue to the fascial planes and the muscles. The pyoderma gangrenosum (PG), on the other hand, is a rare, rapidly progressive (except for the post-surgical PG), autoinflammatory ulcerative skin and soft tissue condition. In this study, we tried to emphasise the importance of diagnosing the NF as well as the PG. Although these two clinical presentations have some standard features, awareness of different symptoms in detail affect the outcome. Any surgical discipline can face NF or PG and, therefore, should be aware of them to decrease the mortality rate. Forty-five patients with NF and PG who were treated between January 2008 and October 2018 were included in the study and evaluated retrospectively for age, sex, localisation, onset of symptoms and diagnosis, predisposing factors, characteristics of tissue defects, laboratory findings, Laboratory Risk Indicator for Necrotising Fasciitis (LRINEC) scores, isolated microbiological agents, surgical intervention, and mortality rate. Demographic, laboratory, and clinical data were analysed. Among these 45 patients, 14 patients had PG, and 31 patients had NF. The mean age and SD for the NF and PG groups were 50.80 ± 17.67 and 50.78 ± 12.72, respectively. Five patients had rheumatological disorders; four patients had diabetes mellitus (DM) in the PG group. Males had higher risk than females in NF (odds ratio [OR] = 0.077, 95% confidence interval [CI] 0.017-0.34), and females had higher risk in PG (relative risk [RR] = 5). We compared the LRINEC score of NF patients with PG patients. The mean value of this score was 4.53 for PG patients, and 6.06 for NF patients. Fifteen patients (33.3%) had a radiological evaluation. MRI, CT, and USI were used as imaging modalities. Necrotising fasciitis and PG are two distinct entities that are in general difficult to distinguish. Therefore, differential diagnosis and rapid treatment are crucial for lowering the mortality rate.

Odontogenic necrotizing fasciitis: a systematic review of the literature

Background

While odontogenic soft tissue infections of the head and neck are common, progression to necrotizing fasciitis is relatively rare. Necrotizing fasciitis is a potentially life-threatening and rapidly progressive soft tissue infection that can lead to significant skin and soft tissue loss, mediastinitis, vascular thrombosis or rupture, limb loss, organ failure, and death.

Methods

A PubMed literature search was conducted for case reports and case series on odontogenic necrotizing fasciitis. Individual patient data was analyzed and compiled and demographic, treatment, microbiology, and mortality data were extracted. Fisher’s exact test was used to examine the relationship between death from odontogenic necrotizing fasciitis and diabetes mellitus (DM) and human immunodeficiency virus (HIV) positivity.

Results

A total of 58 studies totaling 164 patients were identified. Thirty-three patients had DM and 3 were HIV +. All patients underwent aggressive surgical debridement and treatment with IV antibiotics. Twenty patients were also treated with hyperbaric oxygen. There were 16 deaths reported, for a mortality rate of 9.8%. The mortality rate among patients with DM was 30.3 and 0% among HIV positive patients. There was a statistically significant increase in the mortality rate in DM patients with odontogenic necrotizing fasciitis (p = 0.0001, odds ratio for death 9.1).

Conclusions

Necrotizing fasciitis arising from odontogenic infection is a rapidly progressive and life-threatening illness. Prompt recognition of the infection, aggressive and often serial surgical debridement, and aggressive broad-spectrum antibiotics are necessary to prevent serious morbidity and mortality. Patients with diabetes mellitus are at a significantly increased risk of death from odontogenic necrotizing fasciitis.

Cervical necrotizing fasciitis: an overlooked diagnosis of a fatal disease

BACKGROUND

Necrotizing fasciitis of the neck is a rare potentially lethal condition if not early diagnosed and managed. We aimed to study the clinical presentation, radiological and microbiological diagnosis, management, and surgical outcome of patients having cervical necrotizing fasciitis (CNF).

MATERIALS AND METHODS

We retrospectively studied patients having a final diagnosis of CNF who were treated at Al Ain Hospital during the period of January 2000 to December 2016.

RESULTS

Six patients with CNF were studied. Diabetes mellitus was the most common predisposing factor (83.3%). All patients presented with a painful neck swelling. The most common source of infection was odontogenic. Mixed microbiological flora was present in five patients. Five patients underwent CT scan of the head and neck with a positive finding of gas in all of them. Repeated aggressive surgical debridement in combination with antibiotic therapy was adopted. Four patients (66.7%) developed superior mediastinitis, two had septicemia, and one patient had a perforated duodenal ulcer. One patient died (overall mortality 16.7%).

CONCLUSION

Maintaining a high index of suspicion is crucially important for diagnosing CNF. Early diagnosis, timely resuscitation, and aggressive surgical debridement are the key to a successful clinical outcome.

Should we consider IgG hypogammaglobulinemia a risk factor for severe complications of Ludwig angina?: A case report and review of the literature

RATIONALE

Cervical necrotizing fasciitis (CNF) and descending necrotizing mediastinitis (DNM) are rare forms of complication of Ludwig angina. These potentially lethal infections are difficult to recognize in early stages and are often associated with predisposing factors like diabetes and immunocompromised states. Moreover, IgG hypogammaglobulinemia (hypo-IgG) is considered to be a risk factor of mortality in patients with septic shock; however, it is not routinely quantified in patients with extremely serious infections, particularly in cases with no history or evidence of immunocompromising disorders.

PATIENT CONCERNS

We present a case of a 58-year-old woman who survived Ludwig angina, complicated by CNF and DNM. Despite a rapid diagnosis, aggressive surgical debridement and broad-spectrum antibiotics, the infection and necrosis advanced, requiring multiple surgical interventions and long intensive care unit (ICU) support.

CONCLUSION

We hypothesize that detecting a low level of endogenous IgG and treating with adjuvant passive immunotherapy was key in determining a favorable outcome.

Necrotizing odontogenic fasciitis of head and neck extending to anterior mediastinum in elderly patients: innovative treatment with a review of the literature

BACKGROUND

Necrotizing fasciitis (NF) of odontogenic origin affecting the head and neck region is a rare but serious clinical condition, which, if diagnosed late, can lead to a fatal outcome. The early diagnosis of necrotizing fasciitis can be difficult. Delay in diagnosis leads to increase in the area of necrosis with a resulting increase in cosmetic deformity and life-threatening complication. In this study, we present two cases of elderly patients with aggressive NF affecting the neck and anterior mediastinum, which were of odontogenic origin.

METHODS

In the two patients selected necrotic skin and soft tissue were removed and wide exposure was achieved with debridement of the neck at the level of the affected layer of superficial cervical fascia. Saline solution was used as irrigation to treat the patients with acute necrotizing fasciitis. Difficulties in managing this condition with NF extent to deep anterior mediastinum is related to clavicle osteotomy or thoracotomy need with high surgical risks. In our technique, by gentle suction in anterior mediastinum, necrotic tissue resection was possible without any osteotomy need.

CONCLUSIONS

Suctioning resection technique associated with hyperbaric, metabolic rebalance, and amino acid support in association with three types antibiotic therapy are fundamental points for correct therapy strategy, leading to full recovery and healing of NF patients even if in very unfavorable conditions. Multidisciplinary approach is paramount for proper treatment of this disease.

Antibiotic susceptibility of 33 Prevotella strains isolated from Romanian patients with abscesses in head and neck spaces

The purpose of this study was to investigate the susceptibility of a series of 33 Prevotella strains isolated from patients with abscesses in the head and neck spaces, presented to one Romanian hospital. The Etest was applied to determine the value of the minimum inhibitory concentrations for: penicillin G, ampicillin, amoxicillin-clavulanate, metronidazole and clindamycin. In addition, the beta-lactamase activity was detected by the chromogenic cephalosporin disc method. The results indicated that 11 isolates were resistant to both penicillin G and ampicillin due to the beta-lactamase production. All the 33 Prevotella strains were susceptible to the other 3 antimicrobial agents tested, except for only one penicillin G - ampicillin resistant isolate of Prevotella buccae (MIC > 32 and MIC = 12 mg/L, respectively), which showed high resistance to clindamycin (MIC > 256 mg/L) too. Our data underline the necessity for antimicrobial testing including monitoring of beta-lactamase production in cases of oro-maxillo-facial mixed anaerobic infections where antimicrobial treatment is required in addition to the surgical drainage. The results of the study indicated that amoxicillin-clavulanate, like metronidazole, was fully active against the tested Prevotella strains. However, local and multicentre surveys on drug resistance among the clinically significant anaerobic isolates should be carried out periodically.