Hematological Alterations in Patients Recovered from SARS-CoV-2 Infection in Havana, Cuba.

Introduction: COVID-19 sequelae, or the short-, medium-, and long-term manifestations of the disease are under continuous study. There are currently few reports on the evolution of hematological variables following a demonstrated absence of SARS-CoV-2 after infection.

Objective: Identify hematological alterations in Cuban adults recovered from SARS-CoV-2 infection, and their relation with disease severity.

The role of tumor necrosis factor alpha - 308A > G polymorphism on the clinical states of SARS-CoV-2 infection.

Background: Tumor necrosis factor-alpha (TNFɑ) is a cytokine that manages the host defense mechanism, which may play a role in the pathogenesis of COVID-19 patients. Several single-nucleotide polymorphisms, described in the promoter region of the TNFα gene, have a significant role on its transcriptional activity. These include the - 308A > G polymorphism which increases the TNFα levels with the expression of the A allele.

[Determination of insecticide-resistance and resistance mechanisms of Blattella germanica (Dictyoptera: Blattellidae)].

In this paper, the level of resistance to four insecticides of 3 Blatella germanica strains collected from various places in the City of Havana province was evaluated. These strains were resistant to two pyrethroids (cypermethrin and lambda-cyalothrine) and to organophosphorate malathion but susceptible to carbamate propoxur. The values of alpha and beta esterases, acetylcholinesterase and gluthatione-S-transferase were estimated in three strains involved in the study.