ABSTRACT
BACKGROUND: Identifying a specific threshold level of SARS-CoV-2 antibodies that confers protection in immunocompromised patients has been very challenging. The aim was to assess the threshold of 264 binding antibody units (BAU)/ml using four different SARS-CoV-2 antibody assays (Abbott, Beckman, Roche, and Siemens) and to establish a new optimal threshold of protection for each of the four antibody assays. METHODS: This study was performed on data retrieved from 69 individuals, who received at least one dose of the Pfizer/BioNTech BNT162b2 or Moderna COVID-19 vaccine (Spikevax) at the Alphabio Laboratory in Marseille, France (European Hospital, Alphabio-Biogroup). The results were compared to the percent inhibition calculated using a functional surrogate of a standardized virus neutralization test (Genscript). RESULTS: Samples from 69 patients were analyzed. For a reference cutoff of 264 BAU/ml, assays showed moderate to good overall concordance with Genscript: 87% concordance for Abbott, 78% for Beckman, 75% for Roche, and 88% for Siemens. Overall concordance increased consistently after applying new thresholds, i.e., 148 BAU/ml (Abbott), 48 (Beckman), 559 (Roche), and 270 (Siemens). CONCLUSION: We suggest specific adjusted thresholds (BAU/ml) for the four commercial antibody assays that are used to assess pre-exposure prophylaxis in immunocompromised patients.
Subject(s)
COVID-19 , Spiders , Humans , Animals , SARS-CoV-2 , 2019-nCoV Vaccine mRNA-1273 , BNT162 Vaccine , COVID-19/prevention & control , Antibodies, Viral , Immunocompromised HostABSTRACT
BACKGROUND: Co-circulation of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and other respiratory viruses, such as influenza and respiratory syncytial virus (RSV), can be a severe threat to public health. The accurate detection and differentiation of these viruses are essential for clinical laboratories. Herein, we comparatively evaluated the performance of the Kaira COVID-19/Flu/RSV Detection Kit (Kaira; Optolane, Seongnam, Korea) for detection of SARS-CoV-2, influenza A and B, and RSV in nasopharyngeal swab (NPS) specimens with that of the PowerChek SARS-CoV-2, Influenza A&B, RSV Multiplex Real-time PCR Kit (PowerChek; Kogene Biotech, Seoul, Korea). METHODS: A total of 250 archived NPS specimens collected for routine clinical testing were tested in parallel by the Kaira and PowerChek assays. RNA standards were serially diluted and tested by the Kaira assay to calculate the limit of detection (LOD). RESULTS: The positive and negative percent agreements between the Kaira and PowerChek assays were as follows: 100% (49/49) and 100% (201/201) for SARS-CoV-2; 100% (50/50) and 99.0% (198/200) for influenza A; 100% (50/50) and 100% (200/200) for influenza B; and 100% (51/51) and 100% (199/199) for RSV, respectively. The LODs of the Kaira assay for SARS-CoV-2, influenza A and B, and RSV were 106.1, 717.1, 287.3, and 442.9 copies/mL, respectively. CONCLUSIONS: The Kaira assay showed comparable performance to the PowerChek assay for detection of SARS-CoV-2, influenza A and B, and RSV in NPS specimens, indicating that the Kaira assay could be a useful diagnostic tool when these viruses are co-circulating.
Subject(s)
COVID-19 , Influenza, Human , Respiratory Syncytial Virus Infections , Respiratory Syncytial Virus, Human , Spiders , Humans , Animals , Influenza, Human/diagnosis , SARS-CoV-2/genetics , Influenza B virus/genetics , Real-Time Polymerase Chain Reaction , Sensitivity and Specificity , COVID-19/diagnosis , Respiratory Syncytial Virus, Human/genetics , Spiders/genetics , NasopharynxABSTRACT
We present the case of a 32-year-old male patient hospitalized during the COVID-19 pandemic because of a Brown spider bite on his lower lip. The Brown spider accident occurred in southern Brazil; at hospital admission, the patient presented on his lip: edema, pustules, necrotic regions, and ulcerations. The patient complained of lower back pain, fever and dyspnea. Laboratory tests showed monocytosis, leukocytosis, neutrophilia, increased D-dimer levels, C-reactive protein, glutamate-pyruvate transaminase, delta bilirubin, creatine phosphokinase, procalcitonin, and fibrinogen. The patient was hospitalized and a multi-professional team carried out the treatment. The medical team diagnosed loxoscelism with moderate changes. The dentist treated the oral cavity. The patient began to develop nausea, vomiting, and desaturation episodes during hospitalization. A computed tomography of the chest was performed, which showed signs of viral infection. The RT-PCR test for COVID-19 was positive. The systemic conditions worsened (renal dysfunction, systemic inflammatory response, pulmonary complications). This condition may have resulted from the association of the two diseases (loxoscelism and COVID-19), leading to the patient's death. This case illustrates the difficulties and risks in treating patients with venomous animal accidents during the pandemic, and the importance of a multi-professional team in treating such cases.
Subject(s)
COVID-19 , Spider Bites , Spider Venoms , Spiders , Animals , Brown Recluse Spider , Humans , Male , Pandemics , Spider Bites/diagnosis , Spider Bites/therapyABSTRACT
We report two confirmed human bite cases by Lactrodectus geometricus , also known as the brown widow spider. These are the first reported bite envenomation incidents by L. geometricus in Malaysia. The incidents occurred in Tawau, Sabah and Paka, Terengganu. Both men were bitten on their ear while putting on motorcycle helmets. The spiders appeared to have nested in the helmets. The dead specimens were collected and sent to the Invertebrate and Vertebrate Neurobiology Laboratory, Department of Parasitology, Universiti Malaya for identification. The species identity was confirmed by DNA barcoding.
Subject(s)
Bites and Stings/epidemiology , Spiders , Animals , Humans , Malaysia/epidemiology , MaleABSTRACT
This article focuses on some representations of the origin of AIDS and Ebola in Burkina Faso, against a new background of Covid-19 which began in early 2020 in connection with two animals: the spider and the bat. These are also, if not first and foremost, heroes of oral literature (from tales to myths) from this region of West Africa. It is up to anthropologists to explore the meandering symbolism and imagination of these liminal animals that move back and forth between the worlds inhabited by humans and the "bush" worlds of non-humans. Here arises a mythological anamnesis. These "trickster" animals challenge categories and understanding of both virologists and anthropologists.
Cet article porte sur quelques représentations de l'origine du sida et d'Ebola en pays lobi burkinabè, avec la Covid-19 en nouvel arrière-plan depuis le début de l'année 2020, en lien avec deux animaux : l'araignée et la chauve-souris. Ce sont aussi, voire d'abord, des héros de la littérature orale (des contes aux mythes) de cette région d'Afrique de l'Ouest. Des anthropologues ont exploré les méandres des symboliques et des imaginaires de ces animaux liminaires qui vont et viennent entre les mondes habités par les humains et les univers de « brousse ¼ des non-humains. Une anamnèse mythologique est mise à jour. Ces animaux rusés se jouent de nos catégories et de notre entendement, virologues et anthropologues ici confondus.