Asia Pacific Journal of Medical Toxicology
Volume:10 Issue: 2, Spring 2021

Snake and scorpion envenomation is a common public health problem in many regions of the world. Life-threatening emergencies may occur in patients with snake and scorpion envenomation; therefore, these patients may be required intensive care unit (ICU) follow-up. Our objective was to present the demographic and clinical characteristics, treatment modalities and short term outcomes of patients with snake and scorpion envenomation who followed up in our tertiary hospital ICU. Patient records were retrospectively searched and snake or scorpion envenomation patients with ICU stay were identified with relevant keywords and ICD-10 codes between January 2010 and September 2019. All cases with ICU stay were included for study analysis, regardless of patient age. Scorpion and snake envenomation managed in outpatient clinic were excluded from our data. Poisoning severity score (PSS) system was used to present signs and symptoms and PSS was calculated. Primary and critical care treatment modalities were identified and analyzed. Forty patients (25 with snake bites [62.5%] and 15 with scorpion sting [37.5%]) were included in this retrospective study. Local and systemic effects have been reported in 33 (82.5%) and in 27 patients (67.5%), respectively. Majority of patients suffered from pain or disturbances in sensory neural, hematological, cardiovascular or metabolic systems. Median PSS was 2 (0-4) and median length of stay in ICU was 2 days (1-12). Mortality rate was 2.5%. Antivenom immunoglobulins (n=32, %80.0), systemic antibacterial agents (n=24, 60%), and paracetamol (n=21, 52.5%) were the most common systemically administered treatments. Surgical interventions were performed in 4 patients (10%) We reported that snake and scorpion envenomation were mostly admitted to the ICU with local and/or systemic symptoms for advanced monitoring and observation. Although life treating emergencies and mortality was uncommon in our study, we think that these patients should be closely followed up in ICU.

Acute poisoning is a common cause of emergency department visits in childhood and can increase children’s morbidity and mortality. Since the causes of child poisoning in different parts of Iran may differ due to cultural differences, this study was conducted to evaluate the most common causes of poisoning in Yazd. This retrospective cross-sectional study is based on the medical records of children less than 18 years of age admitted to the pediatric emergency department at Shahid Sadoughi Hospital in Yazd during 2018. The collected data included demographic information, the cause, and the outcome of acute poisoning. Out of 105 cases, 61.9% were boys. The highest poisoning rates were in the age group of 1 to 4 years (55.2%). In 50% of the participants, the family size was five or more, and 91% had Iranian nationality. Drugs were identified as the most common causes of poisoning (51.4%), and opioid analgesics were the most frequent drugs. The most common complaint at the time of referral in patients was the loss of consciousness (33%). The mean hospital stay was 56 hours, and no death was reported. According to the findings of this study in Yazd, the probability of accidental poisoning in boys under four years and due to different types of drugs, especially opioids, was higher than others. It seems that increasing parents’ awareness about keeping drugs used by family members in a safe place and out of children’s reach is essential in preventing poisoning.

Hexaconazole is a category 3/4 of poison as per the W.H.O Expert Group on Pesticide Residues. Hexaconazole is used to control infection by fungi in paddy and other crops. Apart from destroying the target species, it can also cause damage to humans. There have been discrete reports of instances of human poisoning due to hexaconazole. A patient record-based cross-sectional study was carried out in Konaseema Institute of Medical Science & Research Foundation, Amalapuram, Andhra Pradesh, India during a period from March 2014 to April 2020 on 26 confirmed cases of hexaconazole poisoning. The clinic-demographic data, hematological, and biochemical parameters at the time of admission and at 72 hrs as well as the outcome were recorded and analyzed using descriptive statistics and paired t test. The prevalence of hexaconazole poisoning was 4.79% of all poisoning cases. The major clinical presentation was gastrointestinal symptoms with vomiting being commonest. There was no significant change in the biochemical and hematological parameters. The mean duration of hospitalization was 4.93+1.39 days. The recovery rate was 100% without any major sequel. Poisoning due to hexaconazole is uncommon in comparison to poisoning by other pesticides in the agricultural community. The clinical manifestations of hexaconazole poisoning indicated that it is  of non-serious nature and its recovery was without any sequel.

Oxidative stress (OS), oxidative DNA damage and inflammatory response induced by chronic exposure to volatile organic compounds and heavy metals (HM) have been implicated in multiple organ dysfunction. The liver enzymes (alanine aminotransferase (ALT), alkaline phosphatase (ALP), gamma glutamyl transferase (GGT)), biomarkers of OS (nitric oxide (NO), glutathione (GSH), total antioxidant capacity (TAC), total plasma peroxides (TPP), malondialdehyde (MDA)) oxidative stress index (OSI)), oxidative DNA damage (8-hydroxy-2-deoxyguanosine (8-OHdG)), and inflammation marker (tumor necrosis factor alpha (TNF-α)); heavy metals (cadmium (Cd), lead (Pb)) and urine hippuric acid (uHA) levels were assessed in automobile workers.

Fifty automobile workers and 50 controls aged 18-60 years were enrolled into this study. The MDA, GSH, NO, TAC, TPP, ALT, ALP and GGT were estimated by colorimetry, 8-OHdG and TNF-α by enzyme linked immunosorbent assay, Cd, Pb by atomic absorption spectrophotometry and uHA by high performance liquid chromatography. Data were analyzed using t-test and correlation analysis at p <0.05.

Automobile workers had significantly higher liver enzymes, lipid peroxidation, oxidative stress, oxidative DNA damage, nitric oxide, HM, uHA and lower total antioxidants relative to controls. Heavy metals were positively associated with MDA, TPP and OSI; TPP with duration of exposure; ALP with number of working hours; and liver enzymes with OSI only in automobile workers.

Association of exposure to toluene and heavy metals with increased liver enzymes activity, lipid peroxidation, oxidative stress, oxidative DNA damage, and depressed antioxidants in automobile workers suggest increased risk of hepatotoxicity and hepatocellular carcinogenesis.

Ayurveda is one of the traditional medical practices that is originated from India where it is still widely practiced. This study is an attempt to determine the concentration of 6 selected metals, namely chromium, cobalt, nickel, arsenic, mercury, and lead in 19 samples of Ayurvedic herbal medicines and 7 Sindoor powders sent by physicians for analysis.

In this study, ICP-MS as direct analysis of a 1 in 100 dilution of the tested materials was employed which gives an estimate of the solubility of the metal constituents of the materials tested in 0.5% nitric acid.

The highest individual metal values found per gram in the tested materials were: chromium 3.2 microgram/g, cobalt 3.1microgram/g, arsenic 2811 microgram/g, mercury 1320 microgram/g, and lead 8329 microgram/g. Assuming only a 1 g intake/day of any single material tested, lead content exceeded in 10/26 (38%) of the preparations above the ANSI 173 oral permitted daily limit (PDE). Likewise, mercury and arsenic contents exceeded the oral PDE in 6/26 (23%). Some of these folk medicines had high levels of more than one element in it. The lead content in 3 of the 7 Sindoor powders surpassed the guideline. However, the nickel content did not exceed the PDE in the 19 samples tested.

Our data shows that, many of Ayurvedic medicine preparations tested still contain toxic amounts of arsenic, mercury, and lead. Sindoor powder which is traditionally and religiously used by many Indian women at their forehead also contains heavy metals like lead. All these materials can pose serious health risks to their users

The Kodo Millet crop is known by different names in different regions such as Varagu, Harka and Arikelu. It is predominantly grown in India and commonly consumed. When infected by certain fungus species, the compound cyclopiazonic acid causes the crop to be toxic to humans.

Case Report: 

The following article discusses a case of Kodo Millet poisoning, which is presented with episodes of vomiting, sweating, giddiness and dysphagia. Upon examination, Sinus bradycardia and hypotension were the major findings. The electrocardiograph (ECG) showed sinus brady arrhythmia, which is rarely presented in Kodo Millet poisoning. The emergency physician team treated the patient symptomatically and he was discharged after 24 hours as the symptoms and the ECG findings were reverted.

Kodo Millet poisoning often occurs due to accidental consumption of infected crops. Its occurrence is rare and the treatment involves only supportive care and monitoring. However, it is important to rule it out as a possible differential diagnosis in similar cases due to other causes. 

Sinus bradyarrhythmia is a rare condition associated with Kodo Millet poisoning. Emergency physicians should be aware of this toxicity to rule out all other possible differential diagnoses and to provide patients with early treatment.

A WHO report included snake envenomation in the list of most important Neglected Tropical Diseases (NTD) and 95% of these cases were reported within developing countries. The reason behind this given importance is the high morbidity and mortality rates of snake envenomation as well as the challenges in availability and affordability of anti-snake venom [1]. Vasculotoxic snake bites has a myriad of manifestations ranging from local complications like necrosis and cellulitis to systemic complications such as coagulopathy, acute renal failure, acute respiratory failure, and hemolysis. 

We report a case of a young male patient who was bitten by a Russell viper snake and developed cellulitis and blackish discolorations of the local site. The patient developed altered sensorium and subsequent loss of consciousness with a CT scan of the brain showing intra-parenchymal and subarachnoid hemorrhage. The coagulation profile demonstrated disseminated intravascular coagulation. He was treated for the above complications with polyvalent anti-snake venom, fresh frozen plasma, and cryoprecipitate units. Three days later, the patient developed breathlessness and hemoptysis with a drop in haemoglobin level with bilateral parenchymal infiltrates and left lower lobe consolidation indicative of diffuse alveolar hemorrhage with acute respiratory distress syndrome. On the fifth day, the patient reduced urine output with raised serum and creatinine levels. The patient’s clinical status rapidly worsened despite mechanical ventilatory and inotropic support and unfortunately succumbed to death on the 7th day of admission.

Although there are case reports of snake bite induced isolated organ involvement, little is known about multi-organ dysfunction due to snake envenomation. The widespread multi-systemic involvement of snake envenomation resulting in fatal intracranial hemorrhage, acute lung, and kidney injury in our patient has been illustrated in this case report.

Methanol toxicity is a life-threatening condition which is rare in developed countries but common in developing countries. Bilateral putaminal necrosis and hemorrhage are potentially two lethal consequences of methanol toxicity which may be due to direct neurotoxicity of methanol metabolites, especially formic acid, or the consequences of acidosis and hypoxemia in the course of poisoning. Hemodialysis is an important part of the treatment of methanol toxicity and some researchers believe that heparin which is administrated during the hemodialysis may be the cause of putaminal hemorrhage .

Case report: 

We report a-32-year old man who presented with acute symptoms of methanol toxicity. A day after hemodialysis he suffered from seizure and Parkinsonism, and the neuroimaging revealed bilateral putaminal hemorrhage. Treatment with Levodopa-carbidopa was introduced for the management of Parkinsonism and finally the patient was discharged with marked improvement of symptoms and relative independency in daily activities

Our patient suffered from a late manifestation of methanol intoxication, bilateral putaminal hemorrhage, and necrosis. This appearance along with subcortical white matter involvement are the most common abnormalities of methanol toxicity in the brain imaging which can be associated with peripheral enhancement. Based on the reported case and review of present evidences, it is suggested that putaminal hemorrhage in methanol toxicity can be due to anticoagulant agents used in hemodialysis