[Loxoscelism with acute compartment síndrome: A case report with successful conclusion].

Background: Loxoscelism is a toxic clinical condition caused by the bite of spiders of the genus , 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.

[Cerebrospinal fluid rhinorrhea secondary to ethmoidal carcinoma: case report].

Background: The first report of cerebrospinal fluid rhinorrhea (CSFR) was described in 1679. In 1826 it was reported that one of the possible causes of CSFR was a fistula between the subarachnoid space and the nasal cavity. In 1903, chemical analysis of the fluid was proposed as a diagnostic criterion.

The type 2 inflammatory response favors recognition of tumor antigens by IgE in breast cancer.

Background: Several studies describe an inverse statistical relationship between the presence of an allergy and development of cancer. However, the immunological mechanism involved in the relationship between these two degenerative diseases has not been explored.

Aims: The main objective of this study was to explore the possibility that the lymphocyte T helper (Th) 2 response, a characteristic of allergy, induces recognition of tumor antigens.

[Prosopis spp. in allergic diseases].

Objectives: To demonstrate cutaneous reactivity and the participation of Prosopis pollen in patients with allergic diseases who attend the Allergy and Clinical Immunology Service of the General Hospital of Mexico, in Mexico City.

Methods: A retrospective and cross-sectional study was carried out by analyzing clinical records that had a complete medical history of patients between the ages of 3 and 79 years, with diagnoses of allergic rhinitis, asthma, and rhinoconjunctivitis.

Results: 1285 patients were studied; the frequency of positive skin reactivity for Prosopis was 27.

Effect of BCG Revaccination on Occupationally Exposed Medical Personnel Vaccinated against SARS-CoV-2.

The production of specific neutralizing antibodies by individuals is thought to be the best option for reducing the number of patients with severe COVID-19, which is the reason why multiple vaccines are currently being administered worldwide. We aimed to explore the effect of revaccination with BCG, on the response to a subsequent anti-SARS-CoV-2 vaccine, in persons occupationally exposed to COVID-19 patients. Two groups of 30 randomized participants were selected: one group received a BCG revaccination, and the other group received a placebo.

Molecular analysis of phenotypic interactions of asthma.

Introduction: Asthma is a heterogeneous disease characterized by multiples respiratory symptoms; this is a polygenic entity that involves a complex interaction of environmental factors and inherent to the individual. To understand the development of asthma, some phenotypes have been proposed.

Objective: This work's purpose was to explore different molecules related to asthma development and to define each phenotype's specific characteristics.

[A brief review of respiratory diseases in pre-Hispanic times in Mexico].

It is known that, in ancient Mexico, diseases of the respiratory system were a major cause of death in the population. Severe epidemics in the XVI Century ravaged and killed nine out of ten indigenous persons. Pre-Hispanic physicians served as medical sorcerers and dealt with the physical and spiritual diseases that afflicted the population.

[The prevalence of sensitization to cockroaches. Experience of an allergy service].

Background: Allergy skin prick tests are important tools for the diagnosis of respiratory allergic diseases. Cockroach antigens have been identified as the cause of rhinitis, asthma, and other allergic diseases.

Objective: To show that the cockroach antigen participates in the cause of allergic diseases.

Identification of an allergenic calmodulin from Amaranthus palmeri pollen.

Introduction: Pollens are an important source of allergens that trigger rhinitis or asthma. The allergenic extracts of pollens used to diagnose and treat allergies contain different allergenic antigens. Isolated allergenic proteins are employed in in vitro assays, skin tests and allergenic-specific immunotherapy.

The cellular and humoral immune response to influenza vaccination is comparable in asthmatic and healthy subjects.

Annual influenza vaccination is recommended as a preventive measure for all patients with asthma since asthma exacerbations in children and adults are associated to viral infections including influenza. There is concern about the adequate immune response in asthmatics with ICS treatment. The production of antibodies to influenza in asthmatics has been demonstrated.

[Hypersensitivity reactions to food additives].

Food additives are ingredients that are intentionally added to food in order to modify its physical, chemical, biological, or sensorial characteristics. Food additives may act as allergens and generate IgE-mediated immune reactions, or they may act as pseudo allergens and generate non-IgE-mediated immune reactions. Such reactions can generate diverse clinical pictures or they may exacerbate diseases as diverse as eosinophilic esophagitis, bronchial asthma, atopic dermatitis, contact dermatitis, chronic urticaria, or anaphylaxis.

[Risk factors for uncontrolled asthma in adults].

Background: Many studies in children had identified risk factors associated with partly or uncontrolled asthma. In adults, factors related to asthma control were not well defined.

Objective: To find the factors related to partly or uncontrolled asthma in adults.

[Perioperative allergy. A 3-year experience].

Background: Perioperative hypersensitivity reactions constitute a global health problem, with an estimated incidence of 1 per 100,000 procedures and a mortality rate of 0.1 to 9 %. Main risk factors are a history of allergy to other drugs, atopy, associated psychiatric disorders and previous surgeries.

[Non-allergic rhinitis with eosinophilic syndrome. Case report].

Background: Rhinitis is the leading cause for consultation in the allergy department. It consists in chronic inflammation of the nasal mucosa. Non-allergic rhinitis with eosinophilic syndrome is characterized by chronic inflammation of the nasal mucosa (> 20% of eosinophils in nasal cytology) in the absence of demonstrable allergy (negative in vivo and in vitro tests); often it is accompanied by other sinonasal conditions (nasal polyposis, chronic rhinosinusitis), and it constitutes a risk factor for the development of obstructive sleep apnea.

Tolerance Induction to Antituberculosis Drugs in a Patient With Stevens-Johnson Syndrome/Toxic Epidermal Necrolysis Overlap.

Tolerance induction and desensitization in Stevens-Johnson syndrome (SJS) or in toxic epidermal necrolysis (TEN) have been described as an absolute contraindication by some authors, but there are cases where there is no treatment alternative. Tuberculosis (TB) remains a leading cause of morbidity and mortality in developing countries and ranks alongside HIV as a leading cause of death worldwide. Severe drug reactions, such as SJS and TEN, occurring in these individuals are lifethreatening.

[Latex sensitization and allergy in Hospital General de Mexico surgery residents].

Background: The prevalence of latex allergy ranges from 0.8 to 6.5% and is the second cause of perioperative anaphylaxis.

[Plantago psyllium-secondary anaphylaxis. Case report].

Background: Psyllium is a derivative of Plantago ovata ground seed and husk that is used as bulk-forming laxatives owing to its hydrocolloid properties.

Case Report: 43-year-old female nurse with previous diagnosis of drug allergy and allergic rhinitis who, after the preparation and administration of a laxative, developed rhinoconjunctivitis symptoms, urticarial syndrome, angioedema and bronchospasm, which led to conclude that she had an anaphylactic reaction. She was treated with adrenaline, corticosteroids and antihistamines.

[Allergic hypersensitivity to antiretroviral drugs: etravirine, raltegravir and darunavir].

All antiretroviral drugs can have both short-term and long-term adverse events. The risk of specific side effects varies from drug to drug, from drug class to drug class, and from patient to patient. A better understanding of the adverse effects of antiretroviral agents is of interest not only for HIV specialists, but also for other physicians who care allergy reactions in HIV-positive patients.

[Frequency of sensitization to aeroallergens in patients with seasonal and perennial allergic conjunctivitis].

Background: Allergic conjunctivitis is an inflammatory disease which involves the conjunctiva, its physiopathology is a type I hypersensitivity (IgE mediated). It is related to the sensitization to indoors and outdoors aeroallergens. Clinically it is classified as seasonal or perennial.

[Allergic bronchopulmonary aspergillosis].

Allergic bronchopulmonary aspergillosis is a slowly progressive disease, caused by the fungus Aspergillus fumigatus hypersensitivity when it is found in the airway. It usually affects asthmatics and patients with cystic fibrosis. We report the case of a 20-year-old male patient, student, farmer and rancher with chronic respiratory disease.

[Sensitization to Casuarina equisetifolia and Pinus spp pollen in patients with allergic rhinitis and asthma in Mexico City].

Background: Pollinosis studies at Mexico City have found a considerable amount of Casuarina equisetifolia and Pinus spp pollen, its sensitization frequency is unknown. In Mexico, some allergens are not considered related to asthma or allergic rhinitis, even though reports in other countries have been demonstrated their relevance as aeroallergens.

Objective: To estimate the frequency of sensitization to Casuarina equisetifolia and Pinus spp pollen.

[Association of obesity in adults with allergic asthma].

Background: Obesity and asthma are diseases of high prevalence around the world. The increment in their incidence constitutes a challenge to public health. Asthma can be worse in patients with obesity.