Validation of a three-dimensional model for improving the design of multiple-backscattering ultrasonic sensors.

Ultrasonic sensors based on backscattering principles have been developed for various applications involving arbitrary or random scatterer distributions. Although the theory of multiple scattering of waves is well-established, it has not been thoroughly explored in these applications. This work presents a feasible and simplified three-dimensional scattering model to predict the transient response generated by a set of rods positioned in the near field of a 1 MHz water-coupled ultrasonic transducer.

HPV vaccination and anal HPV infection in gay, bisexual, and other men who have sex with men.

Background: Gay, bisexual, and other men who have sex with men (gbMSM) have a higher risk of human papillomavirus (HPV) infection and related diseases and would benefit from preventive measures such as HPV vaccination. We assessed the association between HPV vaccination and anal HPV infection in HIV-negative gbMSM and gbMSM living with HIV from the Lubricant Investigation in Men to Inhibit Transmission of HPV Infection study.

Methods: Participants attended 7 visits over 12 months where they provided a nurse-collected anal sample and self-completed a questionnaire on risk factors and HPV vaccination.

Genetic diversity of Bartonella spp. in vampire bats and associated Streblidae bat flies in the Brazilian Amazon.

Among mammals, bats stand out as important reservoirs for Bartonella spp., second only to rodents. In Brazil, out of the 182 species of bats described, three are hematophagous: Desmodus rotundus, Diphylla ecaudata and Diaemus youngii.

Therapeutic Efficacy and Safety of Paracetamol versus Ibuprofen in Patent Ductus Arteriosus in Newborns: A Systematic Review.

Closure of the ductus arteriosus (DA) using cyclooxygenase (COX) inhibitors is considered the first-line treatment for hemodynamically significant patent ductus arteriosus (PDA). Physiologically, prostaglandins have a recognized role in PDA. Admittedly, the comparative efficacy and safety between ibuprofen and acetaminophen need to be determined for rational choice of drug therapy for closure of the DA in clinical protocols.

Molecular survey of vector-borne agents in lowland tapirs (Tapirus terrestris) from Brazil reveals a new Anaplasma genotype.

Although vector-borne agents have been detected in different species of wild animals, studies involving tapirs (Tapirus terrestris), the largest land mammals in Brazil, are scarce. The aim of the present study was to investigate the occurrence and molecular identity of Anaplasmataceae agents, Coxiella burnetii and Hepatozoon spp. in blood samples of wild T.