Oswaldo Cruz Institute

Mouse musculotendinous junction, indicating collagen fibers (in blue) and muscle cells (in red), using Masson's trichomatic stain. Authors: Thalita Paschoal Silva, Luzia Fátima Gonçalves Pinto, Pedro Paulo de Abreu Manso and Marcelo Pelajo Machado

Confocal fluorescence microscopy showing lipid corpuscles/drops (in green) in peritoneal lavage cells (nuclei in blue) after 24 hours of leptin stimulation. The image is part of an academic master's dissertation at the Postgraduate IOC. Authors: Jéssica Pereira, Lívia Teixeira, Clarissa M. Maya Monteiro

The "Enlace" image represents two protozoa of the species Trypanosoma cruzi, the parasite that causes Chagas Disease, intertwined. Obtained by means of scanning electron microscopy on the electron microscopy platform of the Fiocruz, colored in post-processing of the image. Image: Anissa Daliry and Maria de Nazaré Soeiro (IOC/Fiocroz)

Snail of the species Biomphalaria glabrata | Author: Ricardo Schmidt

Image shows adhesion of particles of the MPXV virus, which causes Mpox, to the host cell, an important step in the infection process. Recording made using a triple ion beam scanning microscope in collaboration with Inmetro. Second place in the Photography Award – Science and Art – 2023 Edition, from CNPq. Author: Debora Ferreira Barreto Vieira

Electron microscopy image of Israeli serovar Bacillus thuringiensis | Authors: Leon Rabinovitch, Josiane de Brito, Vera Cristina de Lima, Suzana Côrte-Real Faria and Camila Guerra

Artistic coloring on scanning electron microscopy image of the protozoan Balantidium coli in its trophozoite form. The image highlights the oral cavity (cytostome), surrounded by dense cilia. Authors: Alynne Barbosa and Helene Santos Barbosa

Artistic staining on image of a feline kidney cell infected with Toxoplasma gondii, obtained by scanning electron microscopy. The detachment of the cell membrane allows the visualization of intracellular parasites organized in the form of a rosette. Authors: Renata Morley de Muno and Helene Santos Barbosa

Microscopy image shows that infection with the parasite Toxoplasma gondii impacts the differentiation of neural progenitor cells, which give rise to neurons. Green filaments indicate the presence of undifferentiated cells in infected culture. Image: Pires, Luiza B. et al. Infection of mouse neural progenitor cells by Toxoplasma gondii reduces proliferation, migration, and neuronal differentiation in vitro. The American Journal of Pathology, Volume 193, Issue 7, 977–994.

In an image recorded with a transmission electron microscope, it is possible to visualize in an enlarged way the ultrastructure of a cell after replication of the monkeypox virus, more precisely, infecting the cytoplasm, the region where the nucleus is found, responsible for storing the cell's genetic material. Photo: Débora F. Barreto-Vieira/IOC/Fiocruzi

bacterial DNA | Author: Rafael de Oliveira Resende

Ultrathin section of a Vero cell infected with a human Zika virus sample analyzed using transmission electron microscopy. Numerous nucleocapsids (demarcated area) | Author: Debora Ferreira Barreto Vieira

Insect Culicoides paraensis, primary vector of Oropouche fever, popularly called maruim or sandfly. Photo: Ceratopogonidae Collection of IOC/Fiocruzi

Artistic coloring on image of the wing of the Haemagogus janthinomys mosquito (Diptera: Culicidae), which transmits wild yellow fever in Brazil. Authors: Jacenir Mallet and Jeronimo Alencar

Photograph shows the marked change in cell structure after 72 hours of infection with the new coronavirus, including the presence of numerous filopodia. Authors: Debora Ferreira Barreto Vieira

Human endothelial cells joined by the VE-cadherin protein (in red). In green, cytoskeleton labeling and in blue, DNA labeling. It is also possible to observe in the left corner the cell division occurring in two cells. Image obtained by confocal microscopy | Author: Julia Góes Porfirio

Female tick of the species Amblyomma cajennense (Acari: Ixodidae) | Author: Maria Ogrzewalska

Image obtained by bright field microscopy of a bronchiole in a histological section of a mouse lung. The objective of the analysis was to find structural changes in the tissue induced by opportunistic bacteria. Authors: Rhayssa Calixto, Marcelo Meuser and Daniel Gibaldi

Dorsal view of a male of the species Rhagovelia brunae, discovered by IOC. Photo: Photo: Oséias Martins Magalhães

Image shows, in detail, the moment when the coronavirus manages to invade the interior of the human cell. Authors: Debora Ferreira Barreto Vieira

Histological section of mouse placenta, submitted to immunofluorescence reaction for vimentin (green), Tpbpa (red) and DNA (white) with reading in confocal laser scanning microscopy | Authors: Nathália Azevedo Portilho and Marcelo Pelajo-Machado

Artificially colored electron microscopy image shows detail of the cephalic end of the species Diomedenema tavaresi, with emphasis on the oral cavity, at the top | Authors: Marcelo Knoff, Delir Corrêa Gomes, Jeannie Nascimento dos Santos, Elaine Guerreiro Giese and Ângela Teresa Silva-Souza

Culture of mouse dorsal root ganglion neurons, showing neurites (in green) and nuclei (in red). Image obtained by confocal microscopy in a study on paraplegia caused by trauma. Authors: Bruno Mietto and Ana Martinez

Histological section of the femoral epiphysis of a mouse submitted to intramuscular administration of autologous blood. Image obtained by optical microscopy in a study related to Chagas disease and inflammation. Authors: Beatriz Philot Pavão, Kelly Cristina Demarque, Marcos Meuser Batista, Gabriel Melo de Oliveira, Marcello André Barcinski and Maria de Nazaré Correia Soeiro

Photomicrograph of Didymosulcus philobranchiarca (Yamaguti, 1970) Pozdnyakov, 1990 (Trematoda: Didymozoidae) gill parasite of Thunnus obesus from the coast of the state of Rio de Janeiro | Authors: Ana Moreira-Silva, Simone Cohen and Márcia Justo

Image of the parasite Trypanosoma janseni obtained by artificially colored scanning electron microscopy | Author: Rubem Menna-Barreto

A transmission electron microscopy image shows cellular damage caused by Oropouche virus infection, including the release of apoptotic bodies (fragments that break off from the cell). Image: Débora Ferreira Barreto Vieira (IOC/Fiocroz)

Mouse musculotendinous junction. Image obtained by brightfield microscopy, using Orceína Caputo staining. The red blood cells in the center and the striations of the muscle tissue are noticed. Authors: Luzia Fátima Gonçalves Pinto, Thalita Paschoal Silva and Pedro Paulo de Abreu Manso

Species Dryas julia, popularly known as Julia. This and three other tropical species can be visited at Borboletário Fiocruz, idealized by IOC. Author: Gutenberg Brito (IOC/Fiocroz)

Parasites of the genus Leishmania. Photo: Leishmania Collection

Species of male nematode Syphacia (Syphacia) alata, obtained by electron microscopy. There is the presence of genital cuticular ornamentation on the accessory hook of the gubernaculum and three pairs of caudal pedunculated papillae: a pre-cloacal pair, a second pair located laterally and a third post-cloacal pair | Author: Natalia Alves Costa

Microscopy image of the nematode parasites 'Angiostrongylus cantonensis' detected in snails. Photo: Josué Damacena