The analysis of MNT and PRNT quantitative results indicated that the intra-class correlation was 0.520. Of the 89 confirmed COVID-19 patients, 64 (71.9%) showed NAb response.

The results of MNT and PRNT were specific with no cross-reactivity. In the early stages of infection, the NAb response was observed with variable antibody kinetics. The neutralization assays can be used for titration of NAb in recovered/vaccinated or infected COVID-19 patients.

The results of MNT and PRNT were specific with no cross-reactivity. In the early stages of infection, the NAb response was observed with variable antibody kinetics. The neutralization assays can be used for titration of NAb in recovered/vaccinated or infected COVID-19 patients.The COVID-19 pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has been predominantly a respiratory manifestation. Currently, with evolving literature, neurological signs are being increasingly recognized. Studies have reported that SARS-CoV-2 affects all aspects of the nervous system including the central nervous system (CNS), peripheral nervous system (PNS) and the muscular system as well. selleck inhibitor Not all patients have reverse transcription-polymerase chain reaction positive for the virus in the cerebrospinal fluid, and diagnosing the association of the virus with the myriad of neurological manifestations can be a challenge. It is important that clinicians have a high-index of suspicion for COVID-19 in patients presenting with new-onset neurological symptoms. This will lead to early diagnosis and specific management. Further studies are desired to unravel the varied neurological manifestations, treatment, outcome and long-term sequel in COVID-19 patients.Congenital portosystemic shunt (CPSS) is a rare disorder characterized by a diversion of Porto-mesenteric blood into systemic veins. Type I is an end to side fistula between the portal vein and the inferior vena cava. Type II is a side to side fistula between the main portal vein or its branches and mesenteric, splenic, gastric, and systemic veins. Clinical presentation of these patients varies. Treatment and management are guided by the type of malformation and clinical presentation. Herein, we present a case of CPSS Type IIb with neurological symptoms, treated with endovascular occlusion with 6-year follow-up without remission.Sporadic Creutzfeldt-Jakob disease (sCJD) is a fatal and rapidly progressive form of dementia caused by the spread of a prion protein within the brain. Its real incidence is unknown since its definitive diagnosis requires histopathological analysis of brain specimens. However, novel tests that detect prion proteins in cerebrospinal fluid samples, such as the real-time quaking-induced conversion (RT-QuIC) technique, now allow the pre-mortem diagnosis of sCJD. Here, we report the first case of sCJD confirmed by RT-QuIC in Latin America, providing evidence of its diagnostic performance and clinical correlation.Despite being common, polyneuropathy remains a diagnostic challenge for most clinicians. Mononeuritis multiplex (MM) refers to involvement of several or many peripheral nerves at the same or different points in time by a disease process. This report describes a case of an atypical presentation of Hansen’s disease (HD) as mononeuritis multiplex in the left lower limb with corresponding radiographic, electrodiagnostic, and histopathological data that confirmed pure neuritic leprosy (PNL). We reiterate that although the incidence of PNL is exceedingly low characterized by nerve involvement without the characteristic cutaneous stigmata, leprosy is still the commonest cause of MM in the Indian sub-continent.This report underscores the crucial need for a heightened multi-disciplinary awareness of this “forgotten and uncommon” presentation of PNL. It is imperative that the treating physician should also understand the various neurological presentations, both mimics and chameleons, of this treatable disease to prevent permanent neuropathic injury and disability.Cutis laxa is a set of genetically heterogeneous conditions with phenotypes ranging from progeria-like appearance, corneal clouding, clenched fingers with marked retardation of growth both pre and postnatal growth to very mild phenotypes with skin laxity becoming evident in 2nd or 3rd decade. A child who presents with predominant motor delay is written off with a clinical diagnosis of rickets in the absence of any clinical sign of lax skin. Here, we report a 2-year-old child who presented with motor delay and joint hyperlaxity. Mutation analysis demonstrated a heterozygous mutationc.G1867A in the exon 15 of ALDH18A1 gene known to cause autosomal dominant cutis laxa.Lyme disease is a multi-organ infectious disease caused by the spirochete “Borrelia burgdorferi,” and transmitted by the “Ixodes” tick. Early disseminated Lyme disease can have varied central nervous system manifestations ranging from meningitis to radiculopathy and cranial neuropathy. If not suspected, misdiagnosis or delayed diagnosis can prove to be fatal. Erythema migrans is the most common clinical presentation, thereby, making dermatological examination extremely crucial in early diagnosis and treatment.Acute disseminated encephalomyelitis (ADEM) has been linked to immunizations, viral infections, and occasionally to arthropods stings. Its association with scorpion stings has not been described. A 29-year-old man, who after being stung by a scorpion presented right hemiparesis and language impairment. Brain MRI showed subcortical bihemispheric lesion characteristics of ADEM and a bigger one compatible with Baló concentric sclerosis (BCS). Patient was managed with steroids, showing complete clinical improvement. Magnetic resonance imaging (MRI) after 6 months showed cavitation of the bigger lesion with no new findings. In 2 years of follow-up, there is no clinical relapse or new lesions in MRI. Although cases of ADEM have been reported due to venom of chilopoda and hymenoptera, the scorpion sting can be considered as another new cause; this case being even more relevant due to present a Baló-like lesion in MRI.