A deep learning-based model for detecting Leishmania amastigotes in microscopic slides: a new approach to telemedicine.

BACKGROUND: Leishmaniasis, an illness caused by protozoa, accounts for a substantial number of human fatalities globally, thereby emerging as one of the most fatal parasitic diseases. The conventional methods employed for detecting the Leishmania parasite through microscopy are not only time-consuming but also susceptible to errors. Therefore, the main objective of this study is to develop a model based on deep learning, a subfield of artificial intelligence, that could facilitate automated diagnosis of leishmaniasis. METHODS: In this research, we introduce LeishFuNet, a deep learning framework designed for detecting Leishmania parasites in microscopic images. To enhance the performance of our model through same-domain transfer learning, we initially train four distinct models: VGG19, ResNet50, MobileNetV2, and DenseNet 169 on a dataset related to another infectious disease, COVID-19. These trained models are then utilized as new pre-trained models and fine-tuned on a set of 292 self-collected high-resolution microscopic images, consisting of 138 positive cases and 154 negative cases. The final prediction is generated through the fusion of information analyzed by these pre-trained models. Grad-CAM, an explainable artificial intelligence technique, is implemented to demonstrate the model's interpretability. RESULTS: The final results of utilizing our model for detecting amastigotes in microscopic images are as follows: accuracy of 98.95 1.4%, specificity of 98 2.67%, sensitivity of 100%, precision of 97.91 2.77%, F1-score of 98.92 1.43%, and Area Under Receiver Operating Characteristic Curve of 99 1.33. CONCLUSION: The newly devised system is precise, swift, user-friendly, and economical, thus indicating the potential of deep learning as a substitute for the prevailing leishmanial diagnostic techniques.

Potential Association Between Latent Toxoplasma gondii Infection and Suicide Attempts: A Case-Control Registry-Based Study.

Toxoplasma gondii is a ubiquitous parasitic protozoan that may be an important cause of neurological and psychiatric diseases. The purpose of this case-control registry-based study was to evaluate the prevalence of T. gondii infection and related risk factors among subjects who attempted suicide by drug use and a control group at the Iranian National Registry Center for Toxoplasmosis in Mazandaran Province, northern Iran. Baseline data were collected from participants using a questionnaire, and a blood sample was taken from each individual. The plasma was prepared for serological analysis, whereas the buffy coat was used for molecular analysis. Out of 282 individuals (147 cases with suicide attempters [SA] and 135 controls), 42.9% of patients and 16.3% of control subjects were positive for anti-Toxoplasma immunoglobin G (IgG), but all participants were negative for T. gondii DNA and anti-Toxoplasma immunoglobin M. Based on multiple logistic regressions, IgG seropositivity in SA in the age group of 20-30 years was 3.22 times higher than that in the control group (p < 0.001). These findings suggest that latent T. gondii infection among SA is significantly higher than that in healthy individuals, indicating a potential association between latent toxoplasmosis and SA at least in the studied area. Further research is needed to shed light on the potential association between T. gondii and suicide among different populations and areas of the world.

Accidental vitamin D3 overdose in a young man.

Vitamin D3 (VD3) is a fat-soluble vitamin that can accumulate in the body and lead to toxicity by increasing 25(OH) D levels when consumed in large amounts. Maintaining 25(OH) D levels greater than 30 ng/mL is crucial for overall health due to the significant role of vitamin D in the body. The most common causes of VD3 intoxication are manufacturing errors or self-administration. Currently, there is no definitive data on the dose and duration of VD3 consumption that leads to toxicity. The maximum daily doses of VD3 that can be tolerated without causing adverse effects are not established. The maximum recommended amount for long-term supplementation is 2,000 units per day. Vitamin D3 toxicity (VDT) can present in various scenarios, ranging from asymptomatic to gastrointestinal, and in severe cases with neuropsychiatric and life-threatening symptoms. We report the case of a 29-year-old man who presented with symptoms of VDT following an accidental overdose of VD3 over 2 weeks.

Viral contamination of acrylic resin removable denture bases in patients with COVID-19: A cross-sectional study.

STATEMENT OF PROBLEM: Salivary gland ducts are one of the primary targets of severe acute respiratory syndrome coronavirus 2. Moreover, saliva contains minor and major salivary gland secretions and a combination of nasopharyngeal and lung secretions. The acrylic resin bases of complete or partial removable dentures have pores and provide a favorable environment for the growth of microorganisms. PURPOSE: The purpose of this cross-sectional study was to investigate the presence of viral contamination of acrylic resin removable denture bases in patients with coronavirus disease 2019 (COVID-19). MATERIAL AND METHODS: The acrylic resin denture bases (partial and complete) of 29 patients with COVID-19 who underwent treatment in the Infectious Diseases Department of Razi Hospital in Ghaemshahr, Mazandaran, Iran, were evaluated. Samples were collected from the intaglio surface of the prostheses by direct swabbing and coding and were evaluated in a laboratory for the presence or absence of coronavirus. The relationship between hospital polymerase chain reaction (PCR) and denture PCR and the relationship between denture type and denture PCR were evaluated with the Fisher exact test (α=.05). RESULTS: Twenty-nine patients, age range 55 to 85 years, 18 women, 3 with partial dentures and 26 with complete dentures, were evaluated. The hospital PCR test was positive in 28 patients, while the denture PCR test was positive in 4 patients. No significant relationship was observed between the results of hospital PCR and denture PCR in patients with COVID-19 (P=.138). All 4 patients who tested positive for denture PCR had complete dentures. No significant relationship was found between denture type and denture PCR test results in patients with COVID-19 (P>999). CONCLUSIONS: Despite the microporous structure of the acrylic resin base, no statistically significant viral contamination was observed.

Clinical manifestations and treatment management of hospitalized patients with zinc phosphide poisoning, Mazandaran Province, Northern Iran.

BACKGROUND: Zinc phosphide (ZnP) is a dark gray crystalline compound used as a rodenticide against rodents such as mice. ZnP poisoning may be accidental or suicidal. The aim of this study was to investigate the clinical manifestations and treatment management of hospitalized patients with ZnP poisoning in Mazandaran Province, northern Iran. METHODS: Between 2013 and 2017, a cross-sectional study was performed on hospitalized patients with ZnP poisoning who were referred to two training hospitals in Mazandaran Province, northern Iran. RESULTS: A total of 127 patients participated in this trial, including 71 (55.9%) men and 56 (44.1%) women. The patients' average (standard deviation) age was 25.5 (±16.82) years, and it took 2.18 (±2.23) hours to refer them to the hospital. There were 42 (33%) cases with less than one package, 9 (7%) cases with several packages, and 76 (60%) cases with no particular usage. CONCLUSIONS: This study has shown that ZnP poisoning may be asymptomatic initially or with mild clinical symptoms that may gradually worsen. Therefore, hospitalization and obtaining a history and a careful physical examination should be considered.

Adverse effects of brimonidine eye drop in children: A case series.

WHAT IS KNOWN AND OBJECTIVE: Brimonidine is increasingly used in the treatment of intraocular hypertension. CASE SUMMARY: We report on five paediatric patients suffering from brimonidine eye drop intoxication. The most frequent signs of the intoxication were a lowered level of consciousness and hypotonia. Other complications were apnea, bradycardia, hypotension and seizure. One of the patients needed cardiopulmonary resuscitation. Apnea in one of the cases was resistant to naloxone. Pupils were unremarkable in two cases. WHAT IS NEW AND CONCLUSION: Brimonidine is potentially lethal for young infants. The absence of miosis and absence of response to naloxone is not a reason to rule out brimonidine poisoning.

Extrapyramidal Syndrome due to Aripiprazole Overdose in a Young Woman: An Unusual Case Report.

Aripiprazole is an atypical antipsychotic medication indicated for the treatment of schizophrenia and bipolar disorders. The drug has been shown to exhibit acceptable efficacy and is often preferred as a first-line psychiatric treatment option owing to its lower incidence of adverse effects. While first-generation antipsychotics are associated with extrapyramidal syndrome (EPS), atypical antipsychotics such as aripiprazole are generally associated with a lower frequency of EPS. In this case, we present a 31-year-old woman with a history of bipolar disorder who developed EPS after ingesting 200 mg of aripiprazole. Fortunately, her symptoms improved with the administration of biperiden, and she was discharged five days after ingestion. This case highlights the potential for significant consequences associated with aripiprazole, even within its therapeutic index.

Massive intracerebral hemorrhage following methamphetamine poisoning in a man: A case report.

INTRODUCTION AND IMPORTANCE: Methamphetamine (MAP) is a highly addictive stimulant known to have detrimental effects on the brain and various physiological systems, including an elevation in heart rate and blood pressure. Additionally, MAP use has been linked to the development of intracerebral hemorrhage (ICH), a serious and potentially fatal condition that is notably prevalent among young individuals. CASE PRESENTATION: We present the case of a 42-year-old man who suffered a massive ICH due to hypertension resulting from MAP poisoning. The patient presented with symptoms of nausea, vomiting, and blurred vision for around two hours following the accidental inhalation of MAP. However, his condition was significantly improved through the implementation of neurosurgical intervention. CLINICAL DISCUSSION: In recent years, the misuse of MAP among young adults has raised concerns about its association with ICH. ICH is a type of stroke where a blood vessel in the brain ruptures due to high blood pressure, causing bleeding. This medical emergency can lead to various symptoms, such as severe headaches, loss of consciousness, and paralysis. ICH is indeed a serious and life-threatening condition that necessitates prompt medical attention. It can also lead to long-term adverse effects for the individual affected. CONCLUSIONS: The association with ICH and MAP abuse among young adults is a substantial public health issue. To gain a comprehensive understanding of the mechanisms underlying MAP abuse-induced elevation of ICH risk, further exploration is necessary.

Neuropsychiatric manifestations due to anticholinergic agents and anabolic steroids ingestion: A case series and literature review.

Anticholinergic toxicity is a common occurrence in the emergency room, making it crucial for emergency clinicians to have a good understanding of this toxidrome. The neuropsychiatric effects of anticholinergic agents and anabolic steroids (ASs) can manifest as symptoms like anxiety, agitation, dysarthria, confusion, seizures, visual hallucinations, bizarre behavior, delirium, psychosis, and coma. When dealing with a conscious patient who has ingested an anticholinergic substance, a detailed history of ingestion can aid clinicians in making an accurate diagnosis. However, the lack of information about the substances consumed can complicate diagnosis. In cases where the exposure is unknown, clinicians should consider anticholinergic poisoning in patients showing signs of altered mental status and physical examination findings consistent with anticholinergic toxicity. We report four cases presenting a range of symptoms, including neuropsychiatric manifestations, following the ingestion of the same bodybuilding powders with anticholinergic properties. All four patients consumed yellow and white powders at the same time and in the same place. Laboratory analysis revealed that yellow powder and white powder contained ASs and cyproheptadine, respectively.

Fatal peritonitis due to gastric perforation in a male heroin addict: A case report and literature review.

INTRODUCTION AND IMPORTANCE: Perforation of hollow organs, such as the stomach, within the abdomen can lead to the development of acute abdomen, a critical and potentially life-threatening condition. It is important to note that there is currently insufficient information available regarding the specific effects of heroin, an illegal substance commonly abused, in causing this particular complication. CASE PRESENTATION: We present the case of a 32-year-old male who is addicted to heroin and was admitted to an addiction rehabilitation center with the aim of overcoming his addiction. After a few days of admission, the patient developed symptoms of abdominal pain, anorexia, and subsequent neurological manifestations, such as drowsiness, confusion, and a decreased level of consciousness. Tragically, the patient suffered a cardiorespiratory arrest upon arrival at the emergency room and despite efforts to resuscitate him, he unfortunately passed away. CLINICAL DISCUSSION: During the autopsy of the aforementioned case, an observation was made of a perforation in the stomach, which ultimately led to the cause of death being identified as peritonitis. Acute peritonitis is recognized as one of the potential causes of acute abdomen, often resulting from the rupture of hollow organs within the abdominal region. It is characterized by inflammation of the serous membrane that lines the abdominal cavity. CONCLUSIONS: Indeed, conducting original and coherent studies to investigate the potential effects of heroin on gastric perforation could prove to be highly valuable in facilitating the timely diagnosis and treatment of this fatal complication.

Management of organophosphorus poisoning and the role of magnesium sulfate: A scoping review of literature.

Organophosphorus agents are easily absorbed via respiratory, gastrointestinal, and dermal routes, and inhibit the acetylcholine transferase enzyme (AChE), which is responsible for the majority of toxicity caused by organophosphates in the body. A comprehensive search was conducted across three prominent databases, namely Google Scholar, PubMed, and Science Direct, to identify relevant articles published. The search focused on the keywords "MgSO4" or "magnesium sulfate" in conjunction with "organophosphate" or "organophosphate poisoning." Inhibition of AChE results in the accumulation of acetylcholine (ACh) in synapses and stimulation of cholinergic receptors. Considering that several studies have shown the use of magnesium sulfate (MgSO4) in inhibiting the release of ACh in the central and peripheral sympathetic and parasympathetic synapses, this study was conducted to review the role of MgSO4 in the treatment of OP. The intravenous administration of MgSO4 exhibits favorable tolerability and clinical efficacy in alleviating cardiac toxicity associated with OP exposure.

Epidemiological Aspects of Opioid Poisoning in Northern Iran: A Registry-Based Clinical Study.

Opioids are a class of drugs that are commonly used to manage pain due to their analgesic and sedative effects. However, the high consumption of opioids in the community has led to an increase in the incidence of overdoses and poisonings caused by various types of these drugs, whether intentional or unintentional. Therefore, comprehending the epidemiological features of patients experiencing opioid poisoning is crucial. We decided to investigate various epidemiological aspects of patients with opioid poisoning in the Mazandaran province, located in northern Iran, during the period of 2020 to 2021. The present investigation was conducted as a descriptive cross-sectional study, wherein we collected data on patients registered in the Mazandaran Registry Center of Opioid Poisoning (MRCOP) who had a history of using any kind of opioid. We collected information on various parameters, including patient demographics, the type of opioid consumed, the mode of consumption, and clinical outcomes. A total of 240 patients were initially registered at the registry center. However, 17 cases were excluded with personal consent, and eventually, a total of 223 patients were included in the investigation. The majority of the patients 70.9% (n = 158) were male, and the average age was 34.4 ± 16.55 years. The most common cause of poisoning reported in our study was intentional, which was mainly due to a suicide attempt. Furthermore, the most prevalent type of opioid consumed was methadone. The most frequently observed symptoms of poisoning among the patients were drowsiness, a decreased level of consciousness, and reduced arterial oxygen saturation levels. Based on the results of our study, several factors were found to be significant in methadone poisoning, including addiction, age, gender, suicide attempt, and a history of psychiatric disorder. These findings highlight the need for public education and awareness campaigns on the risks associated with opioid use, particularly methadone.

Potential diagnostic application of a novel deep learning- based approach for COVID-19.

COVID-19 is a highly communicable respiratory illness caused by the novel coronavirus SARS-CoV-2, which has had a significant impact on global public health and the economy. Detecting COVID-19 patients during a pandemic with limited medical facilities can be challenging, resulting in errors and further complications. Therefore, this study aims to develop deep learning models to facilitate automated diagnosis of COVID-19 from CT scan records of patients. The study also introduced COVID-MAH-CT, a new dataset that contains 4442 CT scan images from 133 COVID-19 patients, as well as 133 CT scan 3D volumes. We proposed and evaluated six different transfer learning models for slide-level analysis that are responsible for detecting COVID-19 in multi-slice spiral CT. Additionally, multi-head attention squeeze and excitation residual (MASERes) neural network, a novel 3D deep model was developed for patient-level analysis, which analyzes all the CT slides of a given patient as a whole and can accurately diagnose COVID-19. The codes and dataset developed in this study are available at https://github.com/alrzsdgh/COVID . The proposed transfer learning models for slide-level analysis were able to detect COVID-19 CT slides with an accuracy of more than 99%, while MASERes was able to detect COVID-19 patients from 3D CT volumes with an accuracy of 100%. These achievements demonstrate that the proposed models in this study can be useful for automatically detecting COVID-19 in both slide-level and patient-level from patients' CT scan records, and can be applied for real-world utilization, particularly in diagnosing COVID-19 cases in areas with limited medical facilities.

Severe metabolic acidosis due to massive metformin overdose in a man: a case report.

Metformin-associated lactic acidosis is an extremely unusual but potentially life-threatening condition. This condition is typically observed in individuals who are suicidal or have type II diabetes mellitus (DM) and have taken an overdose of metformin. In this case, we present the instance of a 43-year-old man who had type II DM and was addicted to oral opium. Following a suicide attempt with an overdose of metformin, he experienced symptoms such as nausea, vomiting, weakness and lactic acidosis. However, prompt and effective treatment was administered, including hemodialysis and adequate hemodynamic resuscitation, leading to a successful outcome.

Tramadol poisoning and its management and complications: a scoping review.

Tramadol (TR) is an opioid agonist (µ-opioid receptors) that also affects the noradrenergic and serotonergic systems. TR is a synthetic analgesic substance with opioid agonist properties that has been approved for pain management by affecting the central nervous system. Objective: The primary objective of this scoping review was to determine the poisoning consequences of TR and its associated symptom management techniques, as well as its effect on opioid and non-opioid receptors, metabolism, and complications on various organ systems. Discussion: Typically, acute overdose of TR is not considered life threatening, and most fatalities are attributed to polysubstance overdose. TR can cause drowsiness, headaches, seizures, respiratory depression, low heart rate, coma, and even death. Additionally, the prolonged use of TR can lead to addiction, with withdrawal resulting in both common and atypical symptoms. Conclusions: Therefore, it is recommended that patients with TR poisoning receive close monitoring of their cardiovascular system, along with a comprehensive management plan for their levels of consciousness and respiratory function.

Fatal outcome due to aluminum phosphide poisoning in an old man with a psychiatric disorder as a latent post-COVID-19 challenge: A case report.

Aluminum phosphide is a metal phosphide widely implemented as a pesticide. In the country of Iran, it is recognized by the colloquial name of rice pill. Any trace of accidental or intentional ingestion of aluminum phosphidecan result in severe hemodynamic disorders and metabolic acidosis, ultimately leading to the patient's mortality. In this report, we document the unfortunate demise of an 85-year-old man who lived in isolation, having lost his wife to COVID-19. The patient consumed aluminum phosphide tablets and, despite resuscitation efforts, inevitably succumbed to the toxic effects.

Compartment syndrome following snakebite in a boy: A case report and literature review.

INTRODUCTION AND IMPORTANCE: Snake bites represent a significant public health issue worldwide, as venomous snake bites can result in lethal consequences if not treated promptly, including both local and systemic effects. The local symptoms of a snake bite commonly include tissue necrosis, edema, and compartment syndrome (CS). While CS is a rare complication following a snake bite, it may be more pronounced in children who typically have lower total dilution volume. Currently, the administration of anti-snake venom and prompt fasciotomy are the only specific treatments available for CS. CASE PRESENTATION: The present report details a case of CS of the right upper extremity in a three-year-old boy who suffered a snake bite on his right hand and was brought to the emergency department of a hospital in northern Iran after a lapse of 14 h. CLINICAL DISCUSSION: Snakebites frequently occur in the extremities, with about two thirds of them happening in the upper extremities. The skin of the dorsum is extremely thin, there is essentially little subcutaneous fat tissue, and there are numerous superficial veins in this area, particularly the hand. CONCLUSIONS: Following snake bites, the use of proximal tourniquets should be avoided, and the public's awareness of this need should be encouraged through health education. The prognosis for recovery following fasciotomy and the significance of follow-up and rehabilitation should also be explained to patients.

Massive dermal ulcerative lesions due to brown recluse spider bite: a rare case report and review of literature.

A brown recluse spider (BRS) bite is challenging to confirm, but may be clinically diagnosed by considering the location, the season of the year, and the clinical manifestations. Here, the case of a 26-year-old male who presented after an insect bite with a skin lesion, bruising, severe swelling, and diffuse blisters on the right lower extremity after three days, is described. Following clinical examination, patient history assessment, and consideration of other relevant factors, the patient received a differential diagnosis of necrotizing fasciitis caused by BRS bite. Although spider bite poisoning is rare, proper diagnosis and management are important because, in some cases, the outcomes may be devastating.

Massive dermal ulcerative lesions because of brown recluse spider bite: a rare case report and review of literature.

A brown recluse spider (BRS) bite is challenging to confirm, but can be clinically diagnosed by considering the location, the season of the year and the clinical manifestations. We described a 26-year-old male who presented after a BRS bite with a skin lesion, bruising, severe swelling and diffuse blisters on the right lower extremity after 3 days. This case should be considered in the differential diagnosis of necrotizing fasciitis. Although spider bite poisoning is rare, proper diagnosis and management are important because, in some cases, it can have devastating outcomes.