Results: 410

Phylogenetic relationships of the Mangrove Hummingbird, "Amazilia" boucardi (Apodiformes: Trochilidae) of Costa Rica

Rev. biol. trop; 72 (1), 2024
Abstract Introduction: A recent revision of the generic classification of the Trochilidae based on DNA sequences revealed many inconsistencies with the current generic classification, largely based on plumage characters subject to homoplasy, especially in the Trochilini, the largest tribe. A thorough g...

Spike(s) protein gene microevolution of SARS CoV-2 virus in Bolivian Population: correlation between phylogeny and contagion waves

Objective: analyze the population gene structure and phylogeny of the S gene of the SARS CoV-2 virus of COVID-19 (+) patients from the Plurinational State of Bolivia and then correlate its phylogeny with the different waves of contagion. Methods: three SARS-CoV-2 samples obtained by nasopharyngeal swabs ...

Reduced genetic diversity and the success of the invasive peacock bass (Cichliformes: Cichlidae)

Braz. j. biol; 84 (), 2024
Abstract Several species of Cichla successfully colonized lakes and reservoirs of Brazil, since the 1960's, causing serious damage to local wildlife. In this study, 135 peacock bass were collected in a reservoir complex in order to identify if they represented a single dominant species or multiple ones, ...

Isolation and characterization of bacteria associated with silkworm gut under antibiotic-treated larval feeding

Braz. j. biol; 84 (), 2024
Abstract The impact of antibiotics on growth, cocoon production was assessed in addition to isolation and characterization of bacteria associated with silkworm gut of infected larvae. Larval rearing was maintained at recommended conditions of temperature and humidity. Silkworm larvae showing abnormal sym...

Genetic variations and phylogenetic relationship of genus Uromastyx from Punjab Pakistan

Braz. j. biol; 84 (), 2024
Abstract During the present study, specimens were collected from selected sites of Cholistan desert and Kalabagh Game Reserve, Punjab province, Pakistan. Each captured specimen was tagged with voucher number and morphometric measurements were taken. The average snout to vent length was 172.559±1.40 mm a...

Diversity of culturable endophytic fungi vary through time in Manihot esculenta Crantz

Braz. j. biol; 84 (), 2024
Abstract Endophytic fungi are a ubiquituos group that colonize all plant species on earth. Studies comparing the location of endophytic fungi within the leaves and the sampling time in Manihot esculenta Crantz (cassava) are limited. In this study, mature leaves of M. esculenta from Panama were collected ...

Phylogenetic relationship between rabies virus (Lyssavirus rabies) variants from two different species

Vet. zootec; 31 (), 2024
Rabies is a fatal zoonotic disease that affects several mammals. Hematophagous bats are recognized hosts of the rabies virus, and their main food source is the blood of other mammals, particularly cattle. During feeding, bats transmit the virus to cattle, which are victims of the disease, contributing to...

Cupiennius spiders (Trechaleidae) from southern Mexico: DNA barcoding, venomics, and biological effect

Background: Members of the genus Cupiennius Simon, 1891 are categorized as wandering spiders and are part of the family Trechaleidae. The genomics and proteomics of Cupiennius spiders from North America remain uncharacterized. The present study explores for the first time molecular data from the endemic...

Epidemiología genómica de los sublinajes δ del virus SARS-CoV-2 de la segunda ola de COVID en Antioquia en el 2021

Biomédica (Bogotá); 44 (1), 2024
Introducción. Durante el desarrollo de la pandemia por SARS-CoV-2 en Antioquia se presentaron picos epidemiológicos relacionados con las variantes α, ɣ, β, µ, ƛ y δ, donde δ tuvo la mayor incidencia y prevalencia. Este linaje se considera una variante de preocupación dadas las manifestaciones c...