A brown recluse spider bite wound: a case report and literature review.

DECLARATION OF INTEREST: The authors have no conflicts of interest.

Protective effects of mesenchymal stromal cell-derived secretome on dermonecrosis induced in rabbits by Loxosceles intermedia spider venom.

Background: Loxoscelism refers to a set of clinical manifestations caused by the bite of spiders from the Loxosceles genus. The classic clinical symptoms are characterized by an intense inflammatory reaction at the bite site followed by local necrosis and can be classified as cutaneous loxoscelism. This cutaneous form presents difficult healing, and the proposed treatments are not specific or effective. This study aimed to evaluate the protective effect of mesenchymal stromal cells-derived secretome on dermonecrosis induced by Loxosceles intermedia spider venom in rabbits. Methods: Sixteen rabbits were distributed into four groups (n = 4). Except for group 1 (G1), which received only PBS, the other three groups (G2, G3, and G4) were initially challenged with 10 µg of L. intermedia venom, diluted in 100 µL of NaCl 0.9%, by intradermic injection in the interscapular region. Thirty minutes after the challenge all groups were treated with secretome, except for group 2. Group 1 (G1-control group) received intradermal injection (ID) of 60 µg of secretome in 0.15 M PBS; Group 2 (G2) received 0.9% NaCl via ID; Group 3 (G3) received 60 µg of secretome, via ID and Group 4 (G4), received 60 µg of secretome by intravenous route. Rabbits were evaluated daily and after 15 days were euthanized, necropsied and skin samples around the necrotic lesions were collected for histological analysis. Results: Rabbits of G1 did not present edema, erythema, hemorrhagic halo, or necrosis. In animals from G2, G3, and G4, edema appeared after 6h. However, minor edema was observed in the animals of G2 and G3. Hemorrhagic halo was observed in animals, six hours and three days after, on G2, G3, and G4. Macroscopically, in G4, only one animal out of four had a lesion that evolved into a dermonecrotic wound. No changes were observed in the skin of the animals of G1, by microscopic evaluation. All animals challenged with L. intermedia venom showed similar alterations, such as necrosis and heterophilic infiltration. However, animals from G4 showed fibroblast activation, early development of connective tissue, neovascularization, and tissue re-epithelialization, indicating a more prominent healing process. Conclusion: These results suggest that secretome from mesenchymal stromal cells cultured in a xeno-free and human component-free culture media can be promising to treat dermonecrosis caused after Loxosceles spiders bite envenoming.

Spider Bite Presenting as Fever, Macrophage Activation Syndrome and a Skin Ulcer.

Introduction: Fever of unknown origin (FUO) refers to a condition of prolonged increased body temperature, without identified causes. The most common cause of FUO worldwide are infections; arthropod bites (loxoscelism) should be considered in view of the spread of the fiddleback spider. Loxoscelism can present in a cutaneous form (a necrotic cutaneous ulcer) or in a systemic form with fever, haemolytic anaemia, rhabdomyolysis and, rarely, macrophage activation syndrome (MAS). For this suspicion, it is important to have actually seen the spider. Case description: A 71-year-old man was admitted to our department because of intermittent fever, arthralgia and a necrotic skin lesion on his right forearm that appeared after gardening. Laboratory tests were negative for infectious diseases, and several courses of antibiotics were administered empirically without clinical benefit. Whole-body computed tomography showed multiple colliquative lymphadenomegalies, the largest one in the right axilla, presumably of reactive significance. A shave biopsy of the necrotic lesion was performed: culture tests were negative and histological examination showed non-specific necrotic material, so a second skin and lymph node biopsy was performed. The patient developed MAS for which he received corticosteroid therapy with clinical/laboratory benefit. Cutaneous and systemic loxoscelism complicated by MAS was diagnosed. Subsequently, the second biopsy revealed morphological and immunophenotypic findings consistent with primary cutaneous anaplastic large cell lymphoma (PC-ALCL). Conclusions: Skin lesions and lymphadenomegalies of unknown origin should always be biopsied. It is very common to get indeterminate results, but this does not justify not repeating the procedure to avoid misdiagnosis. LEARNING POINTS: In case of necrotic skin lesions with fever, malignancy (and in particular cutaneous lymphoma) should always be considered.Misdiagnosis of loxoscelism is common. Definitive diagnosis requires the identification of the responsible spider.It is frequent to obtain inconclusive results from biopsies, but this does not justify not repeating the procedure to avoid misdiagnosis.

Fatal Viscerocutaneous Brown Recluse Envenomation With Orbital Compartment Syndrome.

Loxosceles is an arachnid genus comprising several species in the United States, popularly known as brown recluse spiders. The venom is cytotoxic, complex, and has a mixture of many proteins, some of which function as proteases. Envenomation can cause necrotic skin lesions that may become extensive and take many months to heal. Even more rarely, venom may cause systemic effects, leading to widespread hemolysis, coagulopathy, and death. These symptoms typically occur rapidly within 24-48 hours following the bite. We describe a rare case of a 44-year-old male with fatal systemic loxoscelism with orbital compartment syndrome requiring emergent lateral canthotomy and cantholysis.

The use of therapeutic plasma exchange in systemic loxoscelism induced treatment resistant hemolytic anemia: A case report.

Brown recluse spider bites can lead to severe reactions such as skin necrosis,hemolytic anemia, and multiorgan failure, which can be life-threatening. Therapeutic plasma exchange has been reported to provide clinical benefit for such cases. In thisreport, we present a case of a brown recluse spider bite that was successfully treated with therapeutic plasma exchange and compare it with previous case reports.

[Loxoscelism with acute compartment síndrome: A case report with successful conclusion]. / Loxoscelismo con síndrome compartimental agudo: reporte de un caso con desenlace exitoso.

BACKGROUND: Loxoscelism is a toxic clinical condition caused by the bite of spiders of the genus Loxosceles, with wide distribution throughout the world.1 Phospholipase D is responsible for dermonecrosis, inflammation, platelet aggregation, hemolysis, alteration of vascular permeability, cytotoxicity, nephrotoxicity, acute renal failure, among other symptoms involved with this protein. CASE REPORT: 27-year-old male patient, who began with a sudden episode of intense pain in the right hand, in the metacarpus and metacarpophalangeal joints. On clinical examination, the upper extremity was noted to have increased volume, extensive edema, hyperemia, and increased local temperature; The lesion progressed to extensive necrosis. Fasciotomies were performed, from distal to proximal, and release of the second and third finger compartment through longitudinal radial and ulnar incisions. A skin autograft was placed, obtained from the anterior surface of the right thigh. Opioid analgesics, non-steroidal anti-inflammatory drugs, corticosteroids, and antibiotics were administered. The skin biopsy reported: inflammatory infiltrate with neutrophils, ulceration, and bacterial colonies. After 27 days he had a favorable evolution, so he was discharged to his home, with follow-up by staff from the Outpatient Service. CONCLUSION: Cutaneous loxoscelism, as a cause of acute compartment syndrome of the hand, is rare, but should be considered in an area endemic for Loxosceles spp. Surgical decompression of the affected compartments represents a decisive factor in the treatment of patients.

ANTECEDENTES: El loxoscelismo es un cuadro clínico tóxico provocado por la mordedura de arañas del género Loxosceles, con amplia distribución en todo el mundo.1 La fosfolipasa D es la responsable de la dermonecrosis, inflamación, agregación plaquetaria, hemólisis, alteración de la permeabilidad vascular, citotoxicidad, nefrotoxicidad, insuficiencia renal aguda, entre otros síntomas implicados con esta proteína. REPORTE DE CASO: Paciente masculino de 27 años, que inició con un cuadro repentino de dolor intenso en la mano derecha, en el metacarpo y las articulaciones metacarpofalángicas. Al examen clínico, la extremidad superior se percibió con aumento de volumen, edema extenso, hiperemia y aumento de la temperatura local; la lesión progresó a necrosis extensa. Se realizaron fasciotomías, de distal a proximal, y liberación del compartimento del segundo y tercer dedo a través de incisiones longitudinales radiales y cubitales. Se colocó un autoinjerto de piel, obtenido de la superficie anterior del muslo derecho. Se administraron analgésicos opioides, antiinflamatorios no esteroides, corticosteroides y antibióticos. La biopsia de piel reporto: infiltrado inflamatorio con neutrófilos, ulceración y colonias bacterianas. Luego de 27 días tuvo evolución favorable, por lo que se dio alta a su domicilio, con seguimiento por personal del servicio de Consulta externa. CONCLUSIÓN: El loxoscelismo cutáneo, como causa de síndrome compartimental agudo de la mano, es poco común, pero debe considerarse en un área endémica para Loxosceles spp. La descompresión quirúrgica de los compartimentos afectados representa un factor decisivo en el tratamiento de los pacientes.

Comparative medical importance of spider bites in Spain over 1997-2020: a retrospective study based on hospital cases coded using ICD.

Envenomation by terrestrial toxic animals is considered a serious risk to human health worldwide. Snakes, hymenopterans, spiders, and scorpions have mainly attracted the attention of medical literature. However, the relative importance of spiders has been studied only in a few countries. Here, we present the first retrospective study on the incidence of spider bites requiring hospital care in Spain, compared to bites or stings from snakes, hymenopterans, and scorpions. Using ICD9MC and ICD10 databases from the World Health Organization's International Classification of Diseases for the period 1997-2020, we quantified the cases of envenomation by spiders, compared to those by other terrestrial toxic animals, the demographic data of envenomation cases, the relative severity of spider bites, and the geographic distribution of envenomation cases. Overall, the incidence of acute intoxication by terrestrial toxic animals in Spain was ca. 1.23 cases per million inhabitants. In decreasing order of importance, cases were due to snakes, hymenopterans, spiders, scorpions, and myriapods. Fatal cases were extremely rare, caused mainly by hymenopterans. No fatalities were caused by spiders, scorpions, and myriapods. A greater incidence of snake bites occurred in northern Spain, but no geographical trends were found for spider bites or scorpion stings. Severe poisoning or life-threatening cases due to bites or stings from toxic terrestrial animals in Spain seems to be very low, especially for spiders, compared to other countries in the world. In general, spiders do not present a risk to human health and should not be considered a major driver of morbidity.

Role of the complement system in kidney cell death induced by Loxosceles venom Sphingomyelinases D.

Envenomation by Loxosceles spiders can result in local and systemic pathologies. Systemic loxoscelism, which can lead to death, is characterized by intravascular hemolysis, platelet aggregation, and acute kidney injury. Sphingomyelinase D (SMase D) in Loxosceles spider venom is responsible for both local and systemic pathologies, and has been shown to induce metalloprotease activity. As the complement system is involved in many renal pathologies and is involved in hemolysis in systemic loxoscelism, the aim of this study was to investigate its role and the role of complement regulators and metalloproteases in an in vitro model of Loxosceles venom induced renal pathology. We investigated the effects of the venom/SMase D and the complement system on the HK-2 kidney cell line. Using cell viability assays, western blotting, and flow cytometry, we show that human serum, as a source of complement, enhanced the venom/SMase D induced cell death and the deposition of complement components and properdin. Inhibitors for ADAM-10 and ADAM-17 prevented the venom induced release of the of the complement regulator MCP/CD46 and reduced the venom/SMase D induced cell death. Our results show that the complement system can contribute to Loxosceles venom induced renal pathology. We therefore suggest that patients experiencing systemic loxoscelism may benefit from treatment with metalloproteinase inhibitors and complement inhibitors, but this proposition should be further analyzed in future pre-clinical and clinical assays.

Integrative taxonomy reveals first record of Loxoscelesrufescens (Dufour, 1820) (Araneae, Sicariidae) in the Philippines.

Background: The spider family Sicariidae Keyserling, 1880 represented by the synanthropic Mediterranean recluse spider, Loxoscelesrufescens (Dufour, 1820), is reported in the Philippines for the first time, based on morphological and molecular data. The introduced spider was observed in a small cave (Kamantigue Cave) in Lobo, Batangas Province. Considering the medical importance of this spider, the proximity of its habitat to human habitation and tourist sites poses a potential public health concern. New information: This study reports on the first record of the family Sicariidae in the Philippines and the fourth recorded occurrence of L.rufescens in Southeast Asia.

Utilization of dapsone and hemoglobin in the epithelial skin regeneration therapy of cutaneous loxoscelism: A case report and integrative literature review

ABSTRACT BACKGROUND: Loxosceles spp are arthropods found worldwide. Its bite may produce cutaneous loxoscelism (necrotic or edematous) or cutaneous-visceral loxoscelism. Depending on their severity and location, cutaneous forms are managed with local cold application and systemic administration of antihistamines, corticosteroids, antibiotics, polymorphonuclear inhibitors, and analgesics. OBJECTIVE: This study aimed to report a case of cutaneous loxoscelism and to identify the main dermatological manifestations associated with the Loxosceles spp bite. DESIGN AND SETTING: This case report and literature review was conducted in a Mexican university. METHODS: A detailed report on the medical management of a patient with cutaneous loxoscelism treated at the emergency department of a public hospital was published. Scopus, PubMed, Web of Science, and Google Scholar databases were searched to identify articles reporting cutaneous loxoscelism. The following keywords were used during the database search: "loxoscelism" OR "spider bite," OR "loxosceles" OR "loxosceles species" OR "loxosceles venom" OR "loxoscelism case report" AND "cutaneous" OR "dermonecrotic arachnidism." RESULTS: A 62-year-old female patient with cutaneous loxoscelism was treated with systemic dapsone and local heparin spray. Eighteen studies with 22 clinical cases were included in this systematic review. Of the 22 patients, 12 (54.5%) were men. L. rufescens was the predominant spider species. CONCLUSIONS: The administration of dapsone and heparin for the management of cutaneous loxoscelism demonstrated success in this case, with no sequelae observed. In general, the literature review indicated favorable outcomes in patients treated with antimicrobials and corticosteroids, with continuous healing of skin lesions. SYSTEMATIC REVIEW REGISTRATION: PROSPERO ID CRD42023422424 (https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42023422424).

Role of the complement system in kidney cell death induced by Loxosceles venom Sphingomyelinases D

Envenomation by Loxosceles spiders can result in local and systemic pathologies. Systemic loxoscelism, which can lead to death, is characterized by intravascular hemolysis, platelet aggregation, and acute kidney injury. Sphingomyelinase D (SMase D) in Loxosceles spider venom is responsible for both local and systemic pathologies, and has been shown to induce metalloprotease activity. As the complement system is involved in many renal pathologies and is involved in hemolysis in systemic loxoscelism, the aim of this study was to investigate its role and the role of complement regulators and metalloproteases in an in vitro model of Loxosceles venom induced renal pathology. We investigated the effects of the venom/SMase D and the complement system on the HK-2 kidney cell line. Using cell viability assays, western blotting, and flow cytometry, we show that human serum, as a source of complement, enhanced the venom/SMase D induced cell death and the deposition of complement components and properdin. Inhibitors for ADAM-10 and ADAM-17 prevented the venom induced release of the of the complement regulator MCP/CD46 and reduced the venom/SMase D induced cell death. Our results show that the complement system can contribute to Loxosceles venom induced renal pathology. We therefore suggest that patients experiencing systemic loxoscelism may benefit from treatment with metalloproteinase inhibitors and complement inhibitors, but this proposition should be further analyzed in future pre-clinical and clinical assays.

Rare Loxoscelism-Associated IgG Coombs-Positive Hemolytic Anemia Treated Successfully With Systemic Corticosteroids.

Loxoscelism-associated hemolytic anemia is a rare but critical complication of brown recluse spider bites. It may lead to various systemic manifestations, including jaundice, dark urine, and anemia-related symptoms, in addition to general loxoscelism symptoms such as skin lesions, fever, myalgia, nausea, and vomiting. Prompt diagnosis is crucial and requires recognizing typical laboratory findings such as low hemoglobin, elevated lactate dehydrogenase, reduced haptoglobin levels, and possibly a positive direct antiglobulin test. There is no definitive guideline for the treatment of loxoscelism-associated hemolytic anemia. we report a case of a 32-year-old female who developed severe Coombs-positive autoimmune hemolytic anemia following a brown recluse spider bite, with an improvement in hemoglobin levels and hemolysis indices after the administration of systemic corticosteroids.

Acute-on-Chronic Liver Failure Triggered by Cutaneous Loxoscelism.

Acute-on-chronic liver failure is a syndrome associated with a high short-term mortality rate. Severe systemic inflammation and single- and multiple-organ failure are a hallmark of this syndrome, with pro-inflammatory precipitating events occurring in the liver or extrahepatic regions. We report a case of a 69-year-old man with a previous diagnosis of alcohol-induced liver cirrhosis who presented with a poorly defined, erythematous-purplish, and edematous plaque with multiple hemorrhagic blisters over the left leg, one day after receiving a spider bite. During the following hours, the skin lesion progressed, and the patient developed hepatic encephalopathy, respiratory failure, and arterial hypotension, requiring the administration of vasopressors; blood analysis revealed hypercreatininemia, an elevated international normalized ratio (INR) value, and hyperbilirubinemia. The patient was diagnosed with acute-on-chronic liver failure caused by cutaneous loxoscelism. There was no hemolytic anemia, rhabdomyolysis, or disseminated intravascular coagulation in the patient, thus excluding the possibility of visceral loxoscelism.

Clinical Evolution After Administering Antivenom in Patients With Loxoscelism.

Spiders are the most numerous arthropods of the arachnid class. More than 45 thousand species of spiders have been identified, and only a few are dangerous to humans. Among them, the "violin spider" or "brown spider" of the genus Loxosceles (family Sicariidae) has a worldwide distribution, and its bite can cause loxoscelism. Initial treatment of a Loxosceles spider bite includes application of local cold, rest, elevation of the extremity if possible, and systemic pharmacotherapy with antihistamines, corticosteroids, antibiotics, polymorphonuclear inhibitors, and analgesics or nonsteroidal anti-inflammatory drugs. During cutaneous or systemic loxoscelism, administration of Loxosceles antivenom (immunoglobulin (Ig)G F(ab')2 fragments) may be indicated to prevent progression to severe systemic phases. In this manuscript, we present three cases of patients with loxoscelism treated with the fabotherapeutic Reclusmyn®, developed and manufactured in Mexico. Two patients had a satisfactory outcome without severe skin or systemic damage. Only one patient with loxoscelism, despite early initiation of antivenom, had extensive skin lesions that healed satisfactorily, leaving only a non-disabling scar. Due to the global presence of this clinical problem, further studies are needed to establish local and general guidelines for the treatment and prevention of loxoscelism. This will allow health professionals to provide more efficient and higher quality medical care and feel supported in their decisions.

The Health Status of Horses Used for at Least Six Complete Cycles of Loxoscelic Antivenom Production.

Antivenom production against Loxosceles venom relies on horses being immunized and bled for plasma harvest. One horse can partake in several cycles of antivenom production, which will require years of constant venom and adjuvant inoculation and bleeding. The actual impact on the health of horses that participate in several antivenom-producing cycles is unknown. Therefore, this study aimed to evaluate the general health status of horses that underwent at least six cycles of loxoscelic antivenom production. Seven crossbred horses that had partaken in six to eight complete antivenom-producing cycles were used and established as the immunized group (IG). Under the same handling and general management, eleven horses were established as the control group (CG). The horses were evaluated regarding their general clinical status and had their blood sampled, and an ECG recorded. The IG presented lower RBC and PCV, despite keeping values within inferior limits for the species. Renal function was not impaired, and liver-related enzymes were higher than those in the CG, probably due to liver exertion from immunoglobulin synthesis. ECG showed some abnormalities in the IG, such as atrioventricular block and a wandering atrial pacemaker, corroborated by an increase in CK-MB. The cardiovascular abnormalities were mainly found in the horses that participated in several antivenom-producing cycles. The overall results indicate that these horses had some impairment of their general health status. Once available, some alternative, less toxic antigens should replace the venom for immunization of horses used for antivenom production.

Role of ErbB and IL-1 signaling pathways in the dermonecrotic lesion induced by Loxosceles sphingomyelinases D.

Sphingomyelinase D (SMase D), the main toxic component of Loxosceles venom, has a well-documented role on dermonecrotic lesion triggered by envenomation with these species; however, the intracellular mechanisms involved in this event are still poorly known. Through differential transcriptomics of human keratinocytes treated with L. laeta or L. intermedia SMases D, we identified 323 DEGs, common to both treatments, as well as upregulation of molecules involved in the IL-1 and ErbB signaling. Since these pathways are related to inflammation and wound healing, respectively, we investigated the relative expression of some molecules related to these pathways by RT-qPCR and observed different expression profiles over time. Although, after 24 h of treatment, both SMases D induced similar modulation of these pathways in keratinocytes, L. intermedia SMase D induced earlier modulation compared to L. laeta SMase D treatment. Positive expression correlations of the molecules involved in the IL-1 signaling were also observed after SMases D treatment, confirming their inflammatory action. In addition, we detected higher relative expression of the inhibitor of the ErbB signaling pathway, ERRFI1, and positive correlations between this molecule and pro-inflammatory mediators after SMases D treatment. Thus, herein, we describe the cell pathways related to the exacerbation of inflammation and to the failure of the wound healing, highlighting the contribution of the IL-1 signaling pathway and the ERRFI1 for the development of cutaneous loxoscelism.

Sistema de presión negativa en loxoscelismo cutáneo-visceral. Reporte de un caso

Introducción: Las mordeduras por araña parda pueden manifestarse desde una simple lesión dérmica en el área de la mordedura, hasta formas graves, con falla orgánica múltiple. Caso Clínico: presentamos el caso de una paciente con mordedura por araña parda, quien presenta inicialmente lesiones dérmicas sin necrosis, evolucionando con áreas de necrosis y el desarrollo de síndrome compartimental de extremidad, sepsis, choque séptico y falla renal. Mejora tras manejo intensivo, anti veneno y colocación de terapia de presión negativa (TPN) en herida, conservando la extremidad afectada integra y recuperando la función renal. Discusion: Este caso en particular presenta los tres tipos de manifestaciones que se generan en el loxoscelismo, las cuales son una forma de presentación poco frecuente. El tratamiento con TPN se ha introducido como una terapia poderosa, no farmacológica para ayudar a acelerar el proceso de cicatrización de heridas y puede ser de utilidad en pacientes con mordedura de araña (loxoscelismo).

Introduction: The brown spider bites have the peculiarity of manifesting from a simple skin lesion in the area of the bite, to severe forms, with multiple organic failure. Clinical Case: We present the case of a patient with a brown spider bite, initially presenting dermal lesions without necrosis, evolving with areas of necrosis and the development of compartment syndrome of extremities, sepsis, septic shock and renal failure. Improvement after intensive management and installation in negative pressure therapy wound (NPT), keeping the affected limb integrated and recovering renal function. Discussion: This case in particular presents the three types of manifestations that are generated in loxoscelism, which are a rare form of presentation. The NPT treatment has been introduced as a powerful, non-pharmacological and physical therapy to help accelerate the wound healing process and may be useful in patients with spider bites.

Kounis Syndrome: A Rare Case of Allergic Angina Secondary to Loxoscelism.

Kounis syndrome or allergic angina is characterized by a sudden transient or permanent myocardial dysfunction caused by inflammatory mediators such as histamine, leukotrienes, platelet-activating factor, neutral proteases, and a number of cytokines and chemokines. Herein, we discuss a case of Kounis syndrome, which was brought on by loxoscelism.

Tratamiento de una lesión primaria por loxoscelismo cutáneo, complicada por infección, con solución electrolizada de superoxidación con pH neutro (SES). Informe de un caso / Treatment of a Primary Lesion of Cutaneous Loxoscelismo, Complicated by Infection, with Neutral Electrolyzed Water (SES). A Case Report

Resumen Las lesiones por loxoscelismo cutáneo pueden complicarse con infecciones concomitantes debido a que el diagnóstico es presuntivo y no existe un esquema de tratamiento específico. Las soluciones electrolizadas de superoxidación de pH neutro (SES) han mostrado ser eficaces en el tratamiento de lesiones cutáneas severas por sus efectos antisépticos y de regeneración del tejido, por lo que podrían ser un método de curación para las lesiones por loxoscelismo cutáneo. Presentamos el caso de un paciente del sexo masculino, de 73 años, cardiópata, diagnosticado con loxoscelismo cutáneo en el tobillo izquierdo que recibió tratamiento convencional de antibióticos, antiinflamatorios, antihistamínicos y analgésicos, y fue dado de alta. Sin embargo, la lesión evolucionó y fue tratada de manera casera con remedios tradicionales; esta se extendió 360° y presentaba exudado fétido al momento en que decidió regresar al hospital. En la clínica de heridas se optó por manejar la lesión en primera instancia con lavados con SES y desbridamiento, seguido de lavados con SES y apósitos de gel SES 3 veces al día, por 3 días, logrando el control de la infección en este tiempo. Posteriormente, con el régimen basado en la aplicación de SES cada 48 horas, se observó la aparición del tejido de granulación al día 7, y la reepitelización en el día 45 de iniciado el abordaje con SES; el cierre total de la lesión se logró el día 67. El esquema de tratamiento basado en el uso de soluciones electrolizadas de superoxidación de pH neutro mostró ser eficaz en el control de la infección y en la inducción del proceso de regeneración del tejido que llevó al cierre de la herida sin complicaciones para el paciente.

Abstract Cutaneous loxoscelism wounds can be complicated by concomitant infections because the diagnosis is presumptive and there is no specific treatment scheme. Neutral electrolyzed water (SES) has been shown to be effective in the treatment of severe skin lesions due to their antiseptic and tissue regeneration effects and could therefore be a healing method for skin loxoscelism lesions. We present the case of a 73-year-old male patient with heart disease, diagnosed with cutaneous loxoscelism in the left ankle, who received conventional treatment of antibiotics, anti-inflammatories, antihistaminics, and analgesics. He was discharged. However, the injury developed and was treated at home with traditional remedies. It extended 360° and presented a fetid exudate at the time he decided to return to the hospital. In the clinic it was decided to manage the lesion in the first instance with washes with SES and debridement, followed by washes with SES and SES gel dressings three times a day for 3 days, achieving control of the infection at that moment. Subsequently, with the regimen based on the application of SES every 48 hours, the appearance of granulation tissue was observed on day 7, and re-epithelialization on day 45 after starting the SES approach, the total closure of the lesion was achieved on day 67. The treatment scheme based on the use of neutral electrolyzed water proved to be effective in controlling the infection and in inducing the tissue-generation process that led to the closure of the wound without complications for the patient.