Transoral laser microsurgery for Tis, T1, and T2 glottic carcinoma: 5-year follow-up.

The aim of this retrospective study is to evaluate the results obtained with CO2 TOLMS in patients with Tis, T1, and T2 glottic tumors at our Department from 2004 to 2016 treated with CO2 TOLMS. One hundred eighty-five patients having a median age of 67 years (range 42-88) were included in the present analysis. The tumor stages of the patients included 134 pTis-T1a, 12 pT1b, and 39 pT2 cases. Median duration of follow-up for the whole study cohort was 55 months (range 24-108 months). At 5-year follow-up, local control was 91%, 83%, and 79.4% for T1a, T1b, and T2 respectively. Disease-specific survival was 95.5%, 91.6%, and 92.3%. Overall survival was 73.8%, 91.6%, and 82%, and larynx preservation was 96.2%, 83%, and 84.6%. This study confirms that CO2 TOLMS is a safe and standard therapy for selected T1 and T2 glottic carcinoma, and our review on T2 glottic cancer suggests that CO2 TOLMS represents a reliable option in terms of overall survival, disease-specific survival, and laryngeal preservation. However, patients with anterior commissure involvement and T2 cancer should be evaluated with a preoperative MRI in order to exclude the infiltration of the laryngeal framework and to quantify the neoplastic involvement of para-glottic space.

Brain gliomas and growth factors: immunohistochemical, immunofluorescence, flow cytometry and RT-PCR profile in pediatric age.

Gliomas represent over 50% of tumors occurring in children. Evidence suggests that glioma stem cells (GSCs), maintained by the transforming growth factor-beta (TGF-ß1) pathway, and vascularization substantially contribute to tumor aggressiveness. The identification of important angiogenic factors such as vascular endothelial growth factor (VEGF) may represent a crucial step in the therapeutic approach against tumor growth and metastatic diffusion. The aim of this study was to identify the expression of TGF-ß1, VEGF and VEGF-receptors in brain gliomas. Specimens of 16 gliomas and 4 controls from children aged 0.2-14 years were used in the study. Immunohistochemical analysis and gene expression study from specimens was performed. Flow cytometry analysis on GSCs was performed to ascertain the expression of VEGF and VEGF-R2 in the tumor stem cell compartment. Newly diagnosed gliomas mainly showed moderate to strong VEGF immunostaining and increased expression of pro-inflammatory molecules in glioma cells. The proportion of TGF-ß1 positive endothelial cells was markedly lower in normal brain vessels compared to tumor vessels. These findings demonstrate that the glioma mass is constituted by a phenotypically immature anoxic central area with a proliferating hypoxic layer; the peripheral area is characterized by cell types with a higher degree of differentiation expressing pro-angiogenic factors. Our data have proven that GSCs play a central role in promoting glioma neovascularization. These findings are useful to understand glioma vascularization, have relevant implications in the therapeutic options and may favor new insights into stem cells biology and suggest therapeutic opportunities for the anti-vascular treatment strategy.

Does focal mechanical stimulation of the lower limb muscles improve postural control and sit to stand movement in elderly?

BACKGROUNDS: Imbalance in elderly is a common problem strictly related to fall. AIMS: This study investigates the possibility that a new protocol based on the focal mechanical muscle vibration may improve balance and stability in elderly. METHODS: Pre-post non-randomized clinical trial has been used. Patients referring postural disequilibrium with negative vestibular bed-side examinations have been treated with focal muscle vibration applied to quadriceps muscles and evaluated before and immediately after therapy and after 1 week and after 1 month with postural stabilometric examination and with an inertial measurement units during the time up and go test. RESULTS: Stabilometric analysis showed statistically significant differences in both the area (p = 0.01) and sway (p < 0.01) of the center of pressure during the close eyes tests. Moreover, the global time of the time up and go test was reduced (p < 0.05) and the rotation velocity was increased (p < 0.01). CONCLUSIONS: The findings confirm the beneficial role of focal muscle vibration in elderly patients improve postural stability and mobility.

Sound therapy in patients with tinnitus: traditional sound generators vs. mobile apps.

OBJECTIVE: Tinnitus Retraining Therapy (TRT) is a rehabilitation approach for tinnitus that is currently considered an effective treatment with an elevated response rate. TRT is usually delivered through sound generators; however, they are often difficult to find and expensive. Recently, mobile apps have been proposed for TRT. This study aims to verify the effectiveness of TRT performed using mobile apps in reducing the adverse effects of tinnitus on the quality of life. PATIENTS AND METHODS: A total of 80 patients affected by tinnitus in category 0 (mild tinnitus) and category 1 (moderate tinnitus), according to the Jastreboff classification, were included in the study. Patients of both classes were subsequently differentiated into two homogeneous groups; the first (Group A) was treated with a traditional sound generator, and the second (Group B) using a mobile app. The Tinnitus Handicap Inventory - the Italian version of the questionnaire - was used to investigate the impact of tinnitus on the quality of life in enrolled patients and evaluate their response to TRT. RESULTS: A significant improvement was found in THI scores in category 0 patients for both sound generator and mobile app groups; no difference was found between the two-treatment delivery technology (-1.186, p=0.783); conversely, tinnitus improvements in category 1 patients were only reported for subjects treated using a sound generator (-14.529, p<0.001), while no significant improvement was found in patients treated using the mobile app. CONCLUSIONS: This study confirms the value of TRT, which in patients with mild tinnitus (category 0), can also be delivered through mobile apps with results comparable to traditional sound generators. Further studies are necessary to confirm the effects of the different tinnitus treatments available and improve the knowledge on this topic.

A report about the experience of COVID-19 active surveillance of homeless, undocumented people, and shelter staff in two cities of Lazio, Italy.

OBJECTIVE: This study aimed to investigate COVID-19 spread among people experiencing homelessness (PEH), undocumented migrants (UMs), and shelter staff of homeless service sites. Another aim has been to prevent an outbreak among these populations. A San Gallicano Institute's initiative to sustain the health system in helping hard-to-reach populations, very often with no community medical care coverage. SUBJECTS AND METHODS: The San Gallicano Dermatological Institute performed active surveillance for COVID-19 on PEH and UMs living in Rome and Latina, Italy. The screening was performed with two swabs: real-time polymerase chain reaction (RT-PCR) and antigen rapid tests. RESULTS: From June 2020 to January 2022, we performed 10,651 tests: 5,442 molecular swabs and 5,209 antigen rapid tests. A total of 3,503 individuals were screened. The prevalence of SARS-CoV-2 infection was 2.9% among the health and social workers and 5.7% among PEH and UMs. None of the people positive for COVID-19 had symptoms or signs of several illnesses. PEH and UMs who tested positive for COVID-19, asymptomatic or pauci-symptomatic, were transferred to a COVID Hotel or dedicated apartment for further clinical monitoring. CONCLUSIONS: People experiencing homelessness and undocumented migrants are often not registered in the National Health Service and, therefore, difficult to trace. These data could aid in estimating the spread of SARS-CoV-2 among people experiencing homelessness, undocumented migrants, and shelter staff in two Italian cities.

Montgomery Salivary Bypass Tube vs Self-Expandable Metal Stents for the treatment of esophageal strictures after total laryngectomy: a crossover study.

Objectives: Dysphagia affects 16% of patients undergoing total laryngectomy; of these, a third is due to pharyngoesophageal stenosis. Currently, the treatment is cyclic dilation of the stricture and Montgomery Salivary Bypass Tube (MSBT) application. The aim of this study is to assess whether using Self-Expandable Metal Stent (SEMS) may give better results after a non-durable response to repeated dilatation and application of MSBT. Materials and Methods: We verified whether using SEMS after at least 3 cyclic dilations and application of MSBT results in a longer dysphagia-free time in laryngectomized patients with pharyngolesopha-geal stenosis. Secondary outcomes were the duration of the procedures, radiation exposure and complications. Results: We enrolled 6 patients with a median age of 65 years (QR 62.5 - 75.75), of which 50% had undergone radiotherapy. Friedman's test for the duration of the dysphagia-free period did not show a statistically significant difference between the two groups (Friedman chi-squared = 2.6667, df = 1, p-value = 0.1025). The time required to implant the MSBT was significantly less than that required to implant the SEMS (Friedman chi-squared = 6, df = 1, p-value = 0.01431). Radiation exposure was absent for MSBT, while SEMS implant required an exposure to X-rays during the procedure and after 48 hours for placement verification. Two patients experienced short-term complications after SEMS implantation and one after two weeks from MSBT implantation; none of them had any health consequences. Conclusion: In patients who are already undergoing cyclic dilations and application of MSBT, switching to SEMS is not beneficial. Furthermore, MSBT has a significantly shorter implant procedure, does not expose the patient to X-rays, and, in the absence of complications, has a longer duration before removal.

COVID-19 pandemic and days of absence from work in workers with flu-like symptoms in the City of Rome, Italy.

ABSTRACT: COVID-19 has dramatically affected working forces. We aim to report our occupational medicine service's experience in managing suspected COVID-19 cases during the pandemic through a retrospec-tive observational study. We compared the number of days employees were absent from work due to flu-like symptoms from March 2020 to February 2021 to the same period the previous year (2019-2020). Two hundred thirty-four patients (+47.2% compared to the previous year) who tested negative for SARS-CoV-2 reported flu-like symp-toms; the number of days of absence from work was 2812 (+190.2% compared to the previous year). On average, employees with flu-like symptoms lost 12.07 working days compared to 6.12 in the previous year (p<0.0001). In conclusion, in our sample COVID-19 has increased the number of working day loss. However, our approach proved to be important, especially during the first months of the pandemic, to limit SARS-CoV-2 spread in workplaces.

Otolaryngology adverse events following COVID-19 vaccines.

OBJECTIVE: Since the outbreak of COVID-19 pandemic, the international scientific community aimed at developing a vaccine to protect against the infection and prevent serious forms of the disease. To date, various adverse events of COVID-19 vaccines have been reported, mostly mild to moderate. MATERIALS AND METHODS: In this short communication, we reviewed available literature and described the most frequent otolaryngology adverse events reported after COVID-19 vaccination. RESULTS: The most frequent adverse events following COVID-19 vaccine described in the literature are represented by audiovestibular symptoms, such as tinnitus, sudden sensorineural hearing loss, vertigo, and dizziness. Other side effects include facial nerve palsy, epistaxis, and oral manifestations (lichen planus, bleeding, ulcers, and vesicles). CONCLUSIONS: COVID-19 vaccine is of utmost importance in limiting the spread of SARS-CoV-2. Otolaryngology-related side effects have been described, but none was severe or life threatening. The mechanisms underlying these effects are still mostly unknown.

Evaluation of olfactory dysfunction persistence after COVID-19: a prospective study.

OBJECTIVE: Alterations of the olfactory function in patients affected by COVID-19 often have an early onset and a variable duration ranging from a few weeks to months. The aim of this study was to evaluate olfactory dysfunction persistence after recovery from COVID-19, and potential related clinical-demographic conditions. PATIENTS AND METHODS: A total of 76 patients recovered from COVID-19 from at least 20 days with olfactory dysfunction during the infection were included in the study. For the subjective evaluation of olfactory function, a visual analogic scale (VAS) was used. The objective evaluation was performed with the use of the Sniffin' Sticks test. RESULTS: Objective assessment of olfactory function revealed that 48 (63.16%) patients were found to be normosmic (TDI ≥ 30.5), 26 (34.21%) were hyposmic (TDI from 30.5 to 16.5) and two (2.63%) were anosmic (TDI ≤ 16.5) at the time of the evaluation. These results did not show a significant difference between subjective and objective tests (p = 0.45). Most patients recovered their sense of smell within the first two months after recovery while a portion (22.2%) still experienced olfactory alterations 4-6 months after SARS-CoV-2 infection. Patients who had not recovered their sense of smell had a significantly longer period of SARS-CoV-2 positivity compared to patients that fully recovered (36.07 ± 7.78 days vs. 29 ± 7.89 days; p = 0.04). CONCLUSIONS: Our results suggest that the duration of the infection negatively correlates with the recovery of olfactory function.

Anesthetic and surgical management of tracheotomy in a patient with Kennedy's Disease.

Introduction: Kennedy's disease (KD) is a rare X-linked recessive motor-neuron neuropathy also known as Spinal and Bulbar Muscular Atrophy (SBMA). Case report: We report a case of Kennedy's disease (KD) with acute laryngeal stridor and dysphagia whose anesthesiologic management required a tracheotomy. The surgical procedure was conducted under local anesthesia performed by ultrasound-guided superior laryngeal nerve block and superficial cervical plexus block using 2% lidocaine. The surgical procedure was well tolerated without any discomfort reported from the patient. Conclusions: In KD local anesthesia should be preferred to general anesthesia as general anesthesia is associated with increased potential for laryngospasm, pulmonary aspiration, and respiratory insufficiency related to the use of neuromuscular blocking agents and opioids. At the best of our knowledge, this is the first case of tracheostomy in KD patient under locoregional anesthesia performed thorough superior laryngeal nerve and superficial cervical plexus block.

Acute alcohol intoxication: a clinical overview.

Abstract: Alcohol is a legal and yet detrimental psychoactive substance, capable of establishing addiction and impacting the physical, mental, social, and economic health of people. Alcohol intake causes a large variety of tissue damages severely impacting the nervous system, digestive and cardiovascular systems and causing oral cavity, oropharyngeal, hypopharyngeal, esophageal, colon-rectal, laryngeal, liver and intrahepatic bile duct, and breast cancers. Alcohol can also play a role in the pathogenesis of diabetes mellitus, cardiomyopathy and hemorrhagic strokes. When drunk during pregnancy it is proved to be responsible for serious damage to fetuses causing a wide range of pathological conditions from miscarriage to Fetal Alcoholic Spectrum Disorder (FASD). Acute ethanol intoxication happens when the amount of alcohol consumed is greater than the disposal capacity of the liver, causing an accumulation of its metabolites displayed by initial dysphoria and disinhibition. Nausea, vomiting, memory loss could happen. Although, it can lead to more serious conditions like impaired speaking, impaired coordination, unstable gait, nystagmus, stupor, or coma. Respiratory depression and death could also happen in such cases. Unfortunately, diagnosis of acute alcohol intoxication is difficult because most of the drinkers deny or minimize their assumption. It is dramatically important to assess when the last intake happened to avoid withdrawal syndrome. Alcohol acute intoxication can be considered a serious harm to health and a relevant issue for healthcare provid-ers working in emergency rooms. Differential diagnosis is crucial to avoid serious outcomes. There is no consensus about therapies for acute intoxication, but supportive and symptomatic treatments were proved effective. The repercussions of alcohol misuse over drinkers' social, familiar, economical and working life enhance the importance of a multidisciplinary approach in such cases.

Nasal Vestibulitis and Vestibular Furunculosis: a systematic review about two common nasal infections and considerations about correct diagnosis and management.

Background: Nasal vestibulitis (NV) and nasal vestibular furunculosis (NVF) are two infectious processes of the nasal vestibule, sharing common etiology, the same risk of complications, and similar treatment while remaining two different pathological entities. Methods: We performed a comprehensive literature research on NV and NVF in PubMed, Cochrane, and Google Scholar databases, with the aim to review the evidence on these two conditions and discuss the therapeutic approaches. Results: We identified a total of 248 records; according to our inclusion/exclusion criteria, 27 of them, published over a period of 59 years (1962-2021), were included in this review. Conclusion: NV and NVF are reported to be common conditions, with well-known etiological agents and risk factors. The diagnosis is clinical and topical antibiotics are the mainstay of treatment. Complications appear to be infrequent. Further studies are necessary to clarify the pathogenetic mechanisms and the exact prevalence of both conditions.

Evaluation of dental demands and needs of people experiencing homelessness in the city of Rome, Italy.

OBJECTIVE: Poor oral health and oral diseases are common among people experiencing homelessness. The aim of this study was to evaluate the dental demands and needs of a population of homeless persons in the city of Rome, Italy. PATIENTS AND METHODS: The clinical records of 165 homeless patients admitted between October 2020 and October 2021 to the dental service of the Primary Care Services of the Eleemosynaria Apostolica, Vatican City, were retrospectively reviewed. The service employed dentists to evaluate dental needs and oral conditions in patients experiencing homelessness. The main dental and oral pathological conditions were noted. RESULTS: One hundred and sixty-five records of homeless patients were included in the study. The sample consisted in 138 males (76.97%) and 27 females (23.03%) with a mean age of 46.9 years (range 7-85 years). Acute tooth pain was reported by 132 (80%) patients, 42 (25.45%) had edentulism or missing teeth and 18 (10.91%) patients had oral lesions. Both dental and oral pathologies were intercepted and managed in secondary healthcare facilities. CONCLUSIONS: Given the specific peculiarities of this vulnerable population, it is important to implement strategies that facilitate the access of persons experiencing homelessness to dental evaluation with a preventive and curative perspective.

Retrospective Study of Salivary Gland Tumor Cases in a Large Italian Public Hospital and Review of the Literature.

ABSTRACT: A variety of tumors can develop in the salivary glands. The aim of this retrospective study was to describe the demographic characteristics of salivary gland tumors (SGT) in the population of a large area of the city of Rome, ASL RM1, over a 4-year period and compare these data with other epidemiological studies. Forty-nine cases were diagnosed as SGT; 63.2% were males and 32.6% were females. The mean age range was 62.13 years. Forty SGT (81.6%) were benign and 9 (18.4%) were malignant. Among benign tumors, Warthin' s tumor was the most common tumor, comprising 55.1% all SGTs followed by Pleomorphic Adenoma and other less common types. Among malignant tumors, Non-Hodgkin lymphoma was the most frequent type. The results of this study suggest that benign tumors are most common in parotid gland and are mainly represented by Warthin's Tumor. Males are the most affected, especially for benign lesions. Regarding malignant tumors, the incidence by gender is variable, as the incidence of several types worldwide. The findings of this study contribute to the knowledge regarding the incidence of SGT.

Acceptance of COVID-19 vaccine among persons experiencing homelessness in the City of Rome, Italy.

OBJECTIVE: Vulnerable populations are being more severely impacted by the ongoing pandemic, and the recent release of vaccines for Coronavirus Disease 19 (COVID-19) may offer them protection. The aim of this study was to investigate the willingness of homeless persons to be vaccinated against COVID-19; secondary aims were to analyze the immunization coverage for other conditions. PATIENTS AND METHODS: The acceptance of COVID-19 vaccine and immunization coverage for other conditions were investigated through a form in 112 persons experiencing homelessness referring to the primary care medical services of the Eleemosynaria Apostolica, Holy See. RESULTS: Most subjects, with a male preponderance, were willing to be vaccinated against COVID-19 (64.3%), 3.6% were unsure and 32.1% preferred not to be vaccinated. When answering questions on the immunization coverage for tuberculosis and hepatitis A and B, most subjects reported not to be vaccinated (48.2%, 56.2% and 55.3%, respectively) or did not know (33%, 28.6% and 27.7%). CONCLUSIONS: A significant portion of our sample declared to be willing to be vaccinated against COVID-19. It would be auspicious that the recent statements from several countries on the importance to extend COVID-19 vaccination to fragile populations be followed by the distribution of the vaccine to these populations.

Antibacterial and antibiofilm effects of radioactive thermal water.

OBJECTIVE: Most of the infections of the upper respiratory tract are caused by biofilm-forming microorganisms belonging to the Pseudomonas, Streptococcus, Staphylococcus, and Enterobacter genus. Many of these microorganisms also show antibiotic resistance, partly related to biofilm formation. The treatment of these affections may include inhalation of radioactive thermal water (RTW). The present study aimed to evaluate the in vitro antibiofilm effect of RTW collected from Merano springs, Italy. MATERIALS AND METHODS: A series of experiments were performed evaluating the effect of RTW against planktonic cultures (1 h exposure) and on biofilms (10 min and 1 h exposure) formed by Staphylococcus aureus, Streptococcus pneumoniae, Pseudomonas aeruginosa, and Escherichia coli. Viable biomass was assessed using a colorimetric assay. A model based on the infection by the same strains of a reconstituted human respiratory epithelium (RHRE) was used to morphologically evaluate the antibiofilm effect of RTW. RESULTS: RTW decreased the viability of S. aureus and S. pneumoniae planktonic cultures by about 20%. RTW also decreased biofilm viability by all strains except for E. coli at both time points. In the RHRE model, bacterial adherence and colonization occurred in all specimens, showing a particular affinity for the epithelium's cilia. Bacterial infections caused significant alterations in the epithelium structure, showing enlargement of the intercellular spaces, and damage to the cell structure. Specimens infected with S. aureus showed slightly lower colonization levels after RTW treatment. CONCLUSIONS: Results of this in vitro study showed a significant effect of RTW against Gram-positive planktonic bacterial cells as well as a significant antibiofilm activity.

Evaluation of Surgical and Functional Outcomes of Supracri- coid Laryngectomy and Rehabilitation Protocols.

ABSTRACT: Laryngeal squamous cell carcinoma (LSCC) is the most common malignant neoplasms of the head and neck. Several treatment options exist for LSCC according to cancer location and stage at diagnosis; proposed treatments include surgery alone or in combination with chemotherapy and radiotherapy. In selected LSCC cases in the T2-T4 staging, supracricoid laryngectomy (SCL) is an organ-sparing surgical approach aimed at preserving the main laryngeal functions that has been proposed as an alternative to total laryngectomy. Rehabilitation for swallowing and respiratory functions plays a central role after SCL; functional outcomes after SCL may significantly vary among different centers but they are generally satisfactory when oncological radicality has been obtained and the rehabilitation protocol starts promptly. In this clinical review, we analyzed functional outcomes for swallowing and voice rehabilitation in patients after SCL, as well as the optimal SCL surgical technique, post-operative complications and comparison with total laryngectomy or radio-chemotherapy protocols.

Arthrogenic human synovial cysts: immunohistochemical profile of interleukin-1beta, interleukin-6, tumour necrosis factor-alpha.

BACKGROUND: Synovial cysts are currently classified as degenerative lesions affecting the joint capsule or adjacent structures. MATERIALS AND METHODS: In our study we describe the results obtained in an immunohistochemical study comprising 18 patients with synovial cysts, performed to evaluate the pathophysiological role of some inflammatory cytokines such as: interleukin (IL)-1ß, IL-6 and tumour necrosis factor-alpha (TNF-α). RESULTS: Results showed an over-expression of TNF-α, IL-1ß and IL-6 which appears to be involved in the onset and progression of the disease. At the present time it is not possible to affirm that these molecules play a direct role also due to the absence of further and more specific investigations. The authors therefore hypothesize that inhibition of inflammation may have a significant role in the pathogenesis and regression of synovial cysts. CONCLUSIONS: Hence, these inflammatory cytokines may be considered potential therapeutic targets. The development of synthetic inhibitors of these inflammatory factors could lead to a reduction in the intensity of inflammation, thus inhibiting the onset and development of the disease.

Effects of COVID-19 pandemic on head and neck oncology activity: the experience of our University Hospital.

OBJECTIVE: The COVID-19 pandemic has severely affected otolaryngology and head and neck activities, also involving diagnosis and treatment of patients with oncology diseases with consequent delays and tumor upstaging. The aim of this study was to describe the experience of our otolaryngology unit during the pandemic on patients with cancer of the head and neck, comparing data on anatomical site of origin and preferred treatment with pre-pandemic data. PATIENTS AND METHODS: This study retrospectively analyzed the clinical records of patients treated for oncology disorders of the head and neck in the Otolaryngology Unit of the Policlinico Umberto I, Sapienza University of Rome, between March 10, 2020, and March 9, 2021. Data were compared with the same period of the previous year (March 10, 2019 - March 9, 2020). RESULTS: During the pandemic, we treated 92 patients with malignant tumor of the head and neck, compared to 101 patients treated during the same period of 2019 (-8.91%). The most common anatomical sites of origin of the neoplasms were larynx, oral cavity, and oropharynx. Surgical approach was preferred in 57 patients (61.95%); non-surgical treatments were performed in 35 cases (38.05%). Compared to the same period of the previous year, we found a 12.90% decrease in the number of oncology patients undergoing surgery, while patients treated exclusively with non-surgical approaches increased by 18.42%. CONCLUSIONS: Despite the impact of COVID-19 on the activity of our otolaryngology unit and on the whole healthcare system, diagnostic and therapeutic procedures for patients affected by malignancy of head and neck region were only minimally impacted.

SARS-CoV-2 infection prevalence in people experiencing homelessness.

OBJECTIVE: People experiencing homelessness have peculiar characteristics that make them more vulnerable to Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) transmission and to more serious forms of Coronavirus Disease 19 (COVID-19). The aim of this study was to evaluate the prevalence of SARS-CoV-2 infection in the homeless population assisted by the primary care services of the Eleemosynaria Apostolica, Vatican City. PATIENTS AND METHODS: Persons experiencing homelessness and the volunteers assisting them were tested for COVID-19 through PCR and antigen rapid test between October 1st, 2020, and June 5th, 2021, in the clinical facilities of the Eleemosynaria Apostolica. RESULTS: A total of 1665 subjects from 96 different countries in five continents were included in the study; age range was 1-90 years. Overall, 2315 COVID-19 tests through nasopharyngeal swab were performed; 1052 Polymerase Chain Reaction (PCR) tests and 1263 antigen rapid tests. Nearly 40% of the subjects underwent both tests (n=650, 39.04%), 402 were tested with PCR test only (24.14%) and 613 with antigen test only (36.8%). PCR tests were negative in 966 cases and positive in 86 (8.17%), while antigen tests were negative in 1205 cases and positive in 58 (4.59%). The number of positive cases varied over time, with a drastic increase during the winter months of 2020 and a progressive decrease over 2021. Among positive cases, 24.41% were symptomatic; symptoms included fever, breathing difficulties, anosmia/hyposmia, cough, headache, and diarrhea. CONCLUSIONS: This study reported an overall prevalence of SARS-CoV-2 infection in our sample slightly above 8%. Additional data on viral genome through sequencing of SARS-CoV-2 in positive cases are of utmost importance to help identify variants and implement specific infection control measures.