Despite the disrepute spiders have had for centuries, their bite is a rare occurrence. In the Mediterranean area, only two of the numerous known species are considered of medical significance: and . Spider bites have no pathognomonic signs or symptoms, therefore most diagnoses are presumptive; a spider bite can only be diagnosed when a spider (seen at the time of the bite) is collected and identified by an expert, since most physicians and patients are unable to recognize a certain spider species or distinguish spiders from other arthropods. Skin lesions of uncertain etiology are too often attributed to spider bites. In most cases, these are actually skin and soft-tissue infections, allergic reactions, dermatoses etc. Misdiagnosing a wound as a spider bite can lead to delays in appropriate care, cause adverse or even fatal outcomes and have medical-legal implications. Concerningly, misinformation on spider bites also affects the medical literature and it appears there is lack of awareness on current therapeutic indications for verified bites.
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http://dx.doi.org/10.1590/1678-9199-JVATITD-2019-0100 | DOI Listing |
Adv Skin Wound Care
January 2025
Marco Palmesano, MD, is Plastic Reconstructive and Aesthetic Surgeon, PhD Program in Applied Medical Surgical Sciences, University of Rome Tor Vergata, Rome, Italy. Davide Johan Bottini, MD, PhD, is Consultant in Maxillofacial Surgery, Policlinico Casilino Hospital, Rome. Also at University of Rome Tor Vergata, Gabriele Storti, MD, is Researcher and Consultant in Plastic Surgery; Lorenzo Secondi, MD, is Plastic Reconstructive and Aesthetic Surgeon, PhD Program in Applied Medical Surgical Sciences; and Carlo Cossi, MD; Alessio Calicchia, MD; Martina Giacalone, MD; and Irene Nunziata, MD, are Plastic Surgery Residents. Emanuela Basile, MD, is Consultant in Maxillofacial Surgery, Policlinico Casilino Hospital. Valerio Cervelli, MD, is Full Professor and Chief, Department of Plastic Surgery, University of Rome Tor Vergata.
Brown recluse spider bites may cause symptoms ranging from local cutaneous reactions to systemic visceral loxoscelism. Most bites are self-limiting, but some can lead to necrotic ulcerations with severe complications and soft tissue defects. Necrotizing ulcers are uncommon and have various clinical presentations, so no standard treatment exists.
View Article and Find Full Text PDFMedicina (Kaunas)
January 2025
Department of Nephrology, Hospital Central de la Defensa Gómez Ulla, 28047 Madrid, Spain.
: The bite of the Loxosceles spider is a public health problem around the world, mainly in Latin America. The viscerocutaneous presentation is related to the inoculation of toxins (phospholipase-D) that generates a systemic inflammatory reaction with a subsequent increase in cytokines and chemokines. Hemoadsorption is proposed as a therapy that allows for the removal of the toxin and modulation of the inflammatory response in this disease.
View Article and Find Full Text PDFToxins (Basel)
December 2024
Molecular Toxinology Lab, Research and Development Department, Ezequiel Dias Foundation-FUNED, Belo Horizonte 30510-010, MG, Brazil.
Spiders of the genus represent a public health problem in Brazil due to the severity of the cutaneous and systemic effects that may result from their bite. In the systemic form of loxoscelism, hemolytic anemia, thrombocytopenia, and disseminated intravascular coagulation can occur. Despite the seriousness of accidents, the venom of some species has not yet been properly characterized considering these hemotoxic effects, such as that of , , and .
View Article and Find Full Text PDFWilderness Environ Med
December 2024
Division of Medical Toxicology, Department of Emergency Medicine, University of Virginia School of Medicine, Charlottesville, VA.
Introduction: The black widow spider, , stands out as one of the most medically significant arachnids due to its extensive geographic distribution in the United States and its ability to produce a potent neurotoxin, α-latrotoxin. This study aimed to describe the epidemiology of black widow spider exposures by month of exposure, geographic distribution, demographics, symptoms, treatment, and health system resource utilization between 2012 and 2022.
Methods: This was a retrospective observational study using the US National Poison Data System, the data warehouse of the 55 US poison centers.
The poison ivy does not normally occur in Slovakia, like in the Czech Republic, but it can be introduced. The venom of the black widow spider is an effective weapon for capturing prey. It is a mixture of various active substances containing a protein neurotoxin called α-latrotoxin (α-LTX).
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