SAHEP - Artigos Científicos
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Os documentos disponíveis no repositório são de propriedade e responsabilidade de seus autores, conforme a legislação que rege o direito autoral no país (Lei nº 9.610 , de 19.02.98).
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Activity of alkaloids from Aspidosperma nitidum against Leishmania (Leishmania) amazonensis
(Nature Research, 2022)This study evaluated the morphological changes caused by fractions and subfractions, obtained from barks of Aspidosperna nitidum, against L. (L.) amazonensis promastigotes. The ethanolic extract (EE) obtained through the ... -
Three-dimensional architecture of Cyrilia lignieresi gametocyte-stage development inside red blood cells
(Wiley, 2022)The Haemogregarinidae family (Apicomplexa: Adeleina) comprises hemoprotozoa that infect mammals, birds, amphibians, fish, and reptiles. Some morphological characteristics of the Cyrilia lignieresi have been described ... -
The first evidence of hepatitis A virus subgenotype IIIA in the Eastern Brazilian Amazon, 1982-1983
(Wiley, 2022)Hepatitis A virus (HAV) is a major causative agent of acute hepatitis worldwide. Although discovered in 1973, due to limitations of applicable serological and/or molecular methods, HAV remained under limited diagnosis until ... -
Shorebirds' longer migratory distances are associated with larger ADCYAP1 microsatellites and greater morphological complexity of hippocampal astrocytes
(Frontiers Media, 2022)For the epic journey of autumn migration, long-distance migratory birds use innate and learned information and follow strict schedules imposed by genetic and epigenetic mechanisms, the details of which remain largely ... -
Oral adenocarcinoma observed in Boa constrictor maintained in captivity
(Universidade Estadual de Londrina, 2022)Information on neoplasms in animals has increased over time, and these studies have helped in the management of reptiles that present tumors. There are similar incidences of neoplasms between homeothermic and ectothermic ... -
Behavioral and neuropathological changes after Toxoplasma gondii ocular conjunctival infection in BALB/c Mice
(Frontiers Media, 2022)Ocular infection with Toxoplasma gondii causes toxoplasmosis in mice. However, following ocular infection with tachyzoites, the cause of the accompanying progressive changes in hippocampal-dependent tasks, and their ... -
Orthohepadnavirus infection in a neotropical bat (Platyrrhinus lineatus)
(Elsevier, 2021)Hepatitis B virus (HBV) is the prototype of the Orthohepadnavirus genus and represents an important cause of chronic hepatitis, liver cirrhosis, and hepatic cancer in humans worldwide. To verify the occurrence and genetic ... -
Microglial metamorphosis in three dimensions in virus limbic encephalitis: an unbiased pictorial representation based on a stereological sampling approach of surveillant and reactive microglia
(MDPI, 2021)Microglia influence pathological progression in neurological diseases, reacting to insults by expressing multiple morphofunctional phenotypes. However, the complete morphological spectrum of reactive microglia, as revealed ... -
Hepatic lesions in captive owl monkeys (Aotus infulatus) with ultrasonographic starry sky liver
(Wiley, 2021)Background The "starry sky" (SK) liver is ultrasonographic pattern characterized by multiple hyperechogenic foci in hepatic parenchyma. The study aimed to characterize the microscopic hepatic lesions in captive owl monkeys ... -
Plasticity in the hippocampal formation of shorebirds during the wintering period: stereological analysis of parvalbumin neurons in Actitis macularius
(Springer, 2021)The number of parvalbumin neurons can be modified by social, multisensory, and cognitive stimuli in both mammals and birds, but nothing is known about their plasticity in long-distance migratory shorebirds. Here, in the ... -
AgNP-PVP-meglumine antimoniate nanocomposite reduces Leishmania amazonensis infection in macrophages
(BMC, 2021)Background: Leishmaniasis is an infectious disease caused by parasites of the genus Leishmania and presents different clinical manifestations. The adverse effects, immunosuppression and resistant strains associated with ... -
Jejunal injuries in captive marmosets affected by chronic wasting disease
(MS/SVS/Instituto Evandro Chagas, 2021)INTRODUCTION: Wasting marmoset syndrome affects the Callitrichidae family reared in captivity, characterized by progressive muscle-weakening and wasting conditions. It has been one of the main causes of death in primates ... -
The fine structure of the axostyle and its associations with organelles in Trichomonads
(Elsevier, 2000)The fine structure of the axostyle in the protists Tritrichomonas foetus and Monocercomonas sp is described using transmission electron microscopy after quick-freezing techniques and immunocytochemistry. The axostyle ... -
The fine structure of the Garnia gonadati and its association with the host cell
(Springer Verlag, 2000)Most of the studies on the fine structure of protozoa of the Apicomplexa group have been carried out with members of the Toxoplasma, Eimeria, and Plasmodium genera. In the present study we analyzed the fine structure of ... -
Microglial morphology across distantly related species: phylogenetic, environmental and age influences on microglia reactivity and surveillance states
(Frontiers Media, 2021)Microglial immunosurveillance of the brain parenchyma to detect local perturbations in homeostasis, in all species, results in the adoption of a spectrum of morphological changes that reflect functional adaptations. Here, ... -
Acquired acoria and iris pearls in leprosy: case report
(SAGE Publications, 2021)Purpose: To describe a case of a patient presenting with acquired acoria and iris pearls, a rare eye manifestation and pathognomonic finding for leprosy; to reinforce clinical, histopathological, and therapeutic aspects ... -
Serological markers for hepatitis a among captive and free-living wild mammals in the State of Para, Brazil
(Universidade do Estado de Londrina, 2021)The hepatitis A virus (HAV, Hepatovirus A) in humans has a relevant impact on public health, especially in geographic regions with poor basic sanitation, such as the Brazilian Amazon. Isolates related to hepatoviruses have ... -
Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice
(Frontiers Media, 2021)To explore the impact of reduced mastication and a sedentary lifestyle on spatial learning and memory in the aged mice, as well as on the morphology of astrocytes in the molecular layer of dentate gyrus (MolDG), different ... -
Immunological impact of tetrahydrobiopterin on the central nervous system in a murine model of rabies virus infection
(Instituto de Medicina Tropical, 2021)Currently, the Milwaukee protocol presents healing results in human beings affected by the rabies virus. However, there are many points to clarify on the action of drugs and the immune mechanism involved in the evolution ... -
Constitutive nitric oxide synthase-like enzyme in two species involved in cutaneous and mucocutaneous leishmaniasis
(Elsevier, 2021)Leishmania is an obligate intracellular parasite that primarily inhabits macrophages. The destruction of the parasite in the host cell is a fundamental mechanism for infection control. In addition, inhibition of the ...