Publications by authors named "Maria L Felix"

Rickettsiales are obligate intracellular bacteria that need vertebrates and arthropods to maintain their life cycles. Some species of the genera Anaplasma, Ehrlichia, and Rickettsia are transmitted by ticks to both animals and humans and can cause mild to severe and even fatal cases. In the Americas, there is substantial data on rickettsial agents, encompassing both clinical cases and the detection of these agents in ticks, but in Ecuador, the information about them remains poorly understood.

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Canine tick-borne diseases, such as babesiosis, rangeliosis, hepatozoonosis, anaplasmosis and ehrlichiosis, are of veterinarian relevance, causing mild or severe clinical cases that can lead to the death of the dog. The aim of this study was detecting tick-borne protozoan and rickettsial infections in dogs with anemia and/or thrombocytopenia in Uruguay. A total of 803 domestic dogs were evaluated, and 10% were found positive (detected by PCR) at least for one hemoparasite.

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During a molecular screening of rickettsial, borrelial and protozoal agents in ticks from rural areas of Panama, we detected DNA of Rickettsia amblyommatis in four Amblyomma mixtum collected from horses in a locality in Los Santos province. Ehrlichia minasensis and Anaplasma marginale were identified from three and two Rhipicephalus microplus, respectively, collected on cows from Chiriqui province. No DNA from other tick-borne agents was found.

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Gestational diabetes mellitus is a condition marked by raised blood sugar levels and insulin resistance that usually occurs during the second or third trimester of pregnancy. According to the World Health Organization, hyperglycemia affects 16.9% of pregnancies worldwide.

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Background: The common cold is a spontaneously remitting infection of the upper respiratory tract, characterised by a runny nose, nasal congestion, sneezing, cough, malaise, sore throat, and fever (usually < 37.8 ºC). Whilst the common cold is generally not harmful, it is a cause of economic burden due to school and work absenteeism.

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The first molecular screening for , , , , and was carried out in questing cf. and from Talamanca Mountains, Panama, using specific primers, sequencing and phylogeny. Phylogenetic analyses for the microorganisms in cf.

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Article Synopsis
  • The study investigates the presence of intracellular Gram-negative bacteria transmitted by ticks, specifically focusing on ehrlichiosis, in free-living ticks collected in Uruguay from 2014 to 2017.
  • A total of 1,548 ticks were gathered from various locations, with DNA detection revealing two novel genotypes related to previously known species, indicating a potential eco-epidemiological link to birds.
  • The findings represent the first characterization of these bacteria in Uruguay and suggest that these specific genotypes do not pose a threat to human health, as the ticks do not feed on humans.
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Human ehrlichiosis are scantily documented in Uruguay. The aim of this study was to investigate the presence of spp. in and in a gray brocket deer () from Uruguay.

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In South America, apicomplexan parasites of the genus Hepatozoon have been sporadically detected in mammals. Previous studies in wild canids from Brazil and Argentina demonstrated infections by species genetically related to Hepatozoon americanum. The aim of the present work was to detect the presence of Hepatozoon in road-killed foxes encountered in Uruguayan highways.

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Introduction: Ixodes tropicalis is a little-known tick species reported parasitizing wild rodents only in Colombia and Perú.

Objective: To report a case of I. tropicalis infesting a human in the south of the metropolitan area of the Valle de Aburrá, Antioquia, Colombia, and to report the molecular detection of Rickettsia bellii in this species.

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Rangelia vitalii is a protozoan parasite that causes a hemorrhagic and hemolytic disease in dogs known as rangeliosis. Current reports of the disease are concentrated in the southern and southeastern regions of Brazil, as well as in Uruguay, Argentina, and Paraguay, and mainly concern domestic dogs. South American wild canids, such as the crab-eating fox (Cerdocyon thous), the pampas fox (Lycalopex gymnocercus), and the maned wolf (Chrysocyon brachyurus) may also be affected, although existing reports are restricted to Brazil.

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The aim of this work was to report the detection of a putative novel strain associated with the tick . Free-living adult ticks determined as were collected by drag-sampling in Argentina and Uruguay. Molecular detection of agents was performed targeting three different loci: 16S rRNA gene, gene and a fragment of heat shock operon.

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Anaplasmataceae includes the genera Anaplasma, Ehrlichia, Neorickettsia and Wolbachia, comprising a group of obligate intracellular bacteria. The genus Anaplasma has pathogenic species transmitted by ticks of veterinary and human health importance. Wild ungulates such as deer represent important reservoirs and amplifiers of Anaplasmataceae.

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Article Synopsis
  • The study investigated the presence of Rickettsia bacteria in soft ticks collected from insect-eating bats in Santa Fe, Argentina.
  • Researchers used morphological identification and genetic sequencing to analyze the ticks and found one tick positive for "Candidatus Rickettsia wissemanii," marking it as the first detection of this Rickettsia in Ornithodoros ticks within Argentina.
  • Additionally, the study contributes to understanding host associations by identifying two bat species, Eptesicus diminutus and Eptesicus furinalis, as new hosts for O. hasei ticks, expanding the known range of this tick species.
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Introduction: The assessment of growth during childhood and adolescence is a critical component of health care at all levels, but it is also part of nutritional status diagnosis and the timely detection of related conditions. Ecuador lacks national growth references, so it has decided to adopt the international standards proposed by the World Health Organization. The objective of this study was to develop national references for weight, height, and body mass index for children and adolescents.

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The purpose of this study was to perform a phylogenetic analysis of Hepatozoon spp. infecting Philodryas patagoniensis in Uruguay. Twenty-five road-killed specimens of P.

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In the southern cone of South America different haplotypes of Borrelia burgdorferi sensu lato (Bbsl) have been detected in Ixodes spp. from Argentina, southern Brazil, Chile, and Uruguay. So far, Lyme borreliosis has not been diagnosed in Uruguay and the medical relevance of the genus Ixodes in South America is uncertain.

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The crab-eating raccoon (Procyon cancrivorus) is a carnivore widely distributed from southern Central America to all South American countries except Chile. In the Southern cone of America, P. cancrivorus has been found parasitized by several Amblyomma spp.

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Rickettsia parkeri, a member of the spotted fever group (SFG) rickettsiae, was first confirmed as an etiological agent of human rickettsiosis in 2004. Nearly all cases are characterized by an inoculation eschar, and no fatalities have been reported. In Uruguay, probable human cases of R.

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Background: The common cold is a spontaneously remitting infection of the upper respiratory tract, characterised by a runny nose, nasal congestion, sneezing, cough, malaise, sore throat, and fever (usually < 37.8º C). The widespread morbidity caused by the common cold worldwide is related to its ubiquitousness rather than its severity.

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Anaplasmataceae family members include vector-borne bacteria of veterinary importance that may also affect humans. Ehrlichia canis and Anaplasma platys are the main members of this family detected in dogs worldwide. In Uruguay there are not many published studies on tick-borne pathogens affecting dogs, the only haemoparasite molecularly confirmed in dogs, is the piroplasm Rangelia vitalii.

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At first Rickettsia conorii was implicated as the causative agent of spotted fever in Uruguay diagnosed by serological assays. Later Rickettsia parkeri was detected in human-biting Amblyomma triste ticks using molecular tests. The natural vector of R.

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Amblyomma triste is the most prevalent tick species reported in human tick bites in Uruguay and has been found to be infected with Rickettsia parkeri, but no other microorganisms have been reported from this tick. A sample of 254 adults of A. triste was collected by flagging on vegetation in suburban areas in southern Uruguay.

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Our aim was to determine the presence of Rickettsia spp. in 66 fleas from Uruguay. Rickettsial DNA was amplified using gltA and ompB PCR primers.

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