New report of Eratyrus cuspidatus Stål, 1859 (Hemiptera: Reduviidae: Triatominae) in the State of Campeche, Mexico.

Introduction: Triatomine bugs are vectors of Trypanosoma cruzi, the etiological agent of Chagas disease.

Methods: Triatomine bugs were collected and identified following established protocols. In addition, infection with T.

[Diffuse cutaneous leishmaniasis (DCL) and visceral leishmaniasis (VL) concurrent with cancer: Presentation of a case].

Male of 52 year old with chronic alcoholism and ulcerated lesion on the face and disseminated nodular skin lesions, underwent to biopsy of ulcer edges where was observed a concomitant epidermoid malignancy with Leishmania (L.). Besides others, biopsies of nodule in the periumbilical region, lymph node and bone marrow were assayed, and all biopsies had abundant amastigotes.

Detection of reactive canines to Leptospira in Campeche City, Mexico.

Leptospira reactivity in stray and household dogs in Campeche as well as associated risk factors to the seropositivity in household dogs have been herein determined. The survey included 323 dogs, 142 of which were stray dogs and 181 household dogs. Nine Leptospira interrogans serovars were tested by the microagglutination test.

The ArcB leucine zipper domain is required for proper ArcB signaling.

The Arc two-component system modulates the expression of numerous genes in response to respiratory growth conditions. This system comprises ArcA as the response regulator and ArcB as the sensor kinase. ArcB is a tripartite histidine kinase whose activity is regulated by the oxidation of two cytosol-located redox-active cysteine residues that participate in intermolecular disulfide bond formation.

Peripheral blood mononuclear cells proliferation and Th1/Th2 cytokine production in response to streptococcal M protein in psoriatic patients.

Background: Psoriasis is a chronic skin disease that is probably a T cell-mediated autoimmune condition which is strongly associated with streptococcal throat infections. Although some groups have associated the involved response with different streptococcal antigens, M protein has been described as the major virulence factor of Streptococcus pyogenes. Thus, it is necessary to describe some features of the cellular responses to this streptococcal antigen.