Ectoparasites of opossum's (Didelphimorphia: Didelphidae) captured in an urban complex in the Northern Brazilian amazon: new hosts and research on hemotropic bacteria.

Ticks and mites are important ectoparasites that affect animal and human health, directly causing harm and acting as vectors of pathogens. This study investigated the ectoparasites of synanthropic didelphids marsupials in northern Amazonia, Brazil, and screened them for hemotropic bacteria. The study was carried out in October 2022 in the metropolitan region of Macapá, Amapá State, Brazil, in vegetation remnants characterized by terra firme rainforest, alluvial forest, and savanna.

First record of Ixodes luciae (Acari: Ixodidae) parasitizing Marmosops noctivagus (Didelphimorphia: Didelphidae) in South America.

This study reports the first record of parasitism of Ixodes luciae Sénevet, on the marsupial Marmosops noctivagus (Tschudi), in Brazil and in South America. The tick I. luciae, previously recorded in Brazil in the Amazonas state, was collected from the marsupial using a flight intercept trap suspended 28 meters above ground, at the canopy level, in an area located 60 km north from Manaus, Amazonas, Brazil.

A new Echimyidae (Mammalia, Rodentia) host of Amblyomma ovale Koch, 1844 in the eastern Brazilian Amazon, and a pathogen survey.

The genus Amblyomma has the largest number of tick species in the Neotropical region. Amblyomma ovale displays high ecological plasticity and can be found in different habitats and a variety of vertebrate hosts. Small mammals of the family Echimyidae have been identified as hosts for this species.

Living in big houses: the role of parasitism on anacondas (Boidae: Eunectes), with new records, parasites catalog, and assessment perspectives.

Anacondas rank among the largest snakes on Earth. Found throughout South America, including urban areas, they are commonly traded globally. However, information on anacondas' parasites and pathogens is scattered, necessitating a comprehensive summary.

Molecular detection and characterization of Trichomonas spp. in wild birds in the Brazilian Pantanal.

Members of the family Trichomonadidae, particularly Trichomonas gallinae, are globally distributed avian parasites that primarily infect birds from the orders Columbiformes, Falconiformes, and Strigiformes. Although infections in Passeriformes are often subclinical, clinical cases have been reported. Transmission occurs through direct contact or indirectly via contaminated food or water, enabling infection across various avian orders, including Anseriformes, Falconiformes, Galliformes, Gruiformes, Passeriformes, Piciformes, Psittaciformes, and Strigiformes.

Collyriclum faba (Bremser, 1831) (Digenea: Collyriclidae) in the Azure jay, Cyanocorax caeruleus (Vieillot, 1818): the first report of the parasite in Brazil.

This study aims to document the first record of the trematode Collyriclum faba in Brazil. This species parasitizes various bird groups, including Passeriformes, Galliformes, and domestic birds, across Europe, Northeast Asia, and the Americas. An Azure Jay (Cyanocorax caeruleus) found in Praia Grande, Santa Catarina State, southern Brazil, exhibited an unusual enlargement and obliteration of the pericloacal region by an approximately 4 cm diameter, multilobular mass was firm in consistency.

Survey of lice Fauna in ornamental chickens from São Paulo and Rio de Janeiro states, Brazil.

Once primarily consumed by humans, chickens have evolved into ornamental poultry industries, with a growing market in Brazil. Ectoparasites, such as chewing lice, can cause mild to severe lesions in chickens. Breeding and disease prevention methods concerning ornamental birds in Brazil are still understudied, with the techniques still based on poultry breeding.

Vector-Borne Bacteria Detected in Ticks, Mites and Flies Parasitizing Bats in the State of Rondônia, Brazilian Amazon.

Bats (Chiroptera) are among the most diverse and geographically dispersed mammals. They are of great importance to the ecosystem, as pollinators, seed dispersers and pest controllers, in addition to being hosts to several parasitic arthropods, including ticks, mites, lice, fleas and flies. Their diet includes the tissue and blood or other body fluids of bats.

New records of fleas and ticks (Siphonaptera and Ixodida) parasitizing wild mammals in Mossoró Municipality, Rio Grande do Norte State, Brazil.

The Caatinga is a Brazilian biome with limited studies on its wild mammal fauna, including the ectoparasitic relationships in these animals. This study aims to report the findings of fleas and ticks infesting wild animals rescued in the municipality of Mossoró, Rio Grande do Norte State (RN), Brazil, and treated at the Veterinary Hospital of the Universidade Federal Rural do Semi-Árido (HOVET-UFERSA). During the clinical assessments and physical examinations of the host animals (one male Cerdocyon thous L.

Molecular detection of Ehrlichia Sp. in bat-associated chigger mites (trombidiformes: leeuwenhoekiidae and trombiculidae S. s.) from Brazil.

Chigger mite larvae are well adapted parasites, mainly of vertebrates, and can play a role as potential vectors for pathogens, as is the case of the bacteria Orientia tsutsugamushi. In Brazil, 63 species of chiggers have been cataloged, eight of which were found parasitizing bats. Until now, no studies have monitored pathogens of bat-associated chigger species in the Americas.

Brazilian fleas (Hexapoda: Siphonaptera): diversity, host associations, and new records on small mammals from the Atlantic Rainforest, including Rickettsia screening.

Background: Insects belonging to the Siphonaptera order are obligatory ectoparasites of vertebrates, including humans. Their life cycle is marked by holometabolous development, and adults are adapted to have a bloodmeal out of their hosts. The objective of this study is to review the families occurring in Brazil with their species and report new records from fleas collected in an Atlantic Rainforest preserved area, including Rickettsia sp.

Molecular Survey of Anaplasmataceae Agents, spp., spp., and Piroplasmids in Ectoparasites from Cave-Dwelling Bats in Mainland Portugal.

Bats and their ectoparasites play a crucial role in understanding the ecology and transmission of vector-borne pathogens, yet these dynamics remain poorly studied in Portugal. This study aimed to investigate the molecular occurrence of vector-borne bacteria ( spp., spp.

First molecular detection of Bartonella spp. in two chewing louse species (Amblycera: Menoponidae and Ischnocera: Philopteridae) parasitizing Calonectris borealis (Cory, 1881) (Procellariiformes: Procellariidae).

Procellariidae is the most diverse family of the order Procellariiformes, with 13 genera and about 90 species of seabirds. The genus Calonectris is represented by three species in the Atlantic Ocean. Bartonella spp.

Reviving knowledge: A 70-year gap in the host-parasite relationship between Trichodectes galictidis (Ischnocera: Trichodectidae) and Galictis cuja (Molina, 1782) (Carnivora: Mustelidae).

Galictis cuja is one of the least known mustelids in South America, with its frequency and distribution poorly documented across the Neotropical region from Mexico to Brazil. In February 2024, a female was rescued by fishermen on Porto Beach in Imbituba, Santa Catarina. A clinical examination revealed ectoparasites on the animal, identified as Trichodectes galictidis, a louse species not detected in these animals for over 70 years.

Unveiling the chewing lice (Menoponidae and Philopteridae) fauna of the Brazilian Northeast: new records for Maranhão and Piauí States.

Lice (Phthiraptera) are obligate ectoparasites of birds and mammals found worldwide. Chewing lice, belonging to the families Menoponidae and Philopteridae, are particularly diverse in Brazil, although their distribution is unevenly documented across states. This study focused on recent collections from protected areas in Maranhão and Piauí, the sampling involved mist netting and comprehensive ectoparasite examination, with specimens identified using both light microscopy and Scanning Electron Microscopy.

Diversity of spp. (Piroplasmida: Theileriidae) in Wild Felids from Brazil and Argentina.

Domestic and wild felids are frequently parasitized by apicomplexan protozoa in the genus . Expanding species diversity has recently been described within this genus, with potential implications for epidemiology and pathogenesis. In light of these findings, this study assessed the genetic diversity of spp.

First record of Ixodes uriae White, 1852 (Parasitiformes: Ixodidae) on the great shearwater (Procellariiformes: Procellariidae) in Southern Brazil: a step toward understanding tick-host interactions.

The Great Shearwater, Ardenna gravis, is the largest and most abundant species of procellarid seabirds in the South Atlantic. A specimen of this shearwater was found dead and parasitized by a hard tick on Cima Beach, Santa Catarina State, southern Brazil. Morphological and molecular analyses confirmed the tick's identity as Ixodes uriae.

New records on autogenic behavior among populations of Ornithodoros fonsecai (Labruna and Venzal, 2009) (Ixodida: Argasidae) from northeastern Brazil.

Ornithodoros fonsecai is an argasid tick that is endemic to Brazil. The autogeny (the oviposition without a blood meal) can be facultative or obligatory in female ticks of the family Argasidae. The present study reports new records on the facultative autogeny among populations of O.

Emerging diseases in poultry: The role of Apolonia tigipioensis Torres and Braga, 1938 (Trombidiformes: Leeuwenhoekiidae) in avian parasitism, including the first record of parasitism in the greater rhea, Rhea americana (L., 1758) (Struthioniformes: Rheidae).

The larval chigger mite Apolonia tigipioensis Torres and Braga is an obligatory hypodermic parasite found in South America. Its parasitism can significantly affect the host's health, leading to nodular lesions that consequently result in the host's death. This species has been identified in Venezuela and northeastern Brazil (Pernambuco State), primarily infesting birds, but it can affect mammals, including humans.

Occurrence of Eutrombicula goeldii (Trombidiformes: Trombiculidae) in free-living Callithrix jacchus Linnaeus, 1758 (Primates: Callitrichidae) in northeastern Brazil.

The present study reports the occurrence of Eutrombicula goeldii (Oudemans) (Trombidiformes: Trombiculidade) on free-living common marmosets, Callithrix jacchus, in Sergipe state, northeastern Brazil. Fifty-two marmosets were captured from 12 family groups, and during the examination of some individuals, orange mites were detected in the peripheral region of the ear and eyelids. The mites were collected via skin scrapings and transparent adhesive tape and observed under a microscope.

Molecular evidence of Wolbachia in bat-associated mite Periglischrus Iheringi Oudemans, 1902 (Mesostigmata: Spinturnicidae) from Brazil.

Wolbachia is an intracellular endosymbiont bacterium found in nematodes and arthopods. Regarding mites, the Wolbachia supergroup U has been described based on strains found in the genus Spinturnix. In this study, ten specimens of Periglischrus iheringi (Mesostigmata: Spinturnicidae), collected from Artibeus obscurus (Chiroptera: Phyllostomidae) in Santa Catarina State, were found to be infected with Wolbachia.

New records of Spelaeorhynchus praecursor Neumann, 1902 (Mesostigmata: Spelaeorhynchidae) in the Brazilian Caatinga.

The Neotropical bat-ectoparasite family Spelaeorhynchidae comprises seven species into in one genus. The species Spelaeorhynchus praecursor is the most distributed in the region, parasitizing phyllostomid bats of the subfamilies Carolliinae, Glossophaginae and Stenodermatinae. The present study expands the known geographic distribution of this species, providing new host records, as well as the first SEM images detailing the main characteristics of this species.

Two case reports of the parasitism of Ophionyssus natricis (Gervais, 1844) (Mesostigmata: Macronyssidae) in captive Epicrates crassus (Cope) (Squamata: Boidae) in Brazil.

There are more than 200 species of Macronyssidae parasitizing reptiles, birds, and mammals worldwide. While most species are found on wild animals, show some degree of geographic, and host group specificity, Ophionyssus natricis thrives on captive snakes and lizards and as a result of the pet trade, has a cosmopolitan distribution. In this study, we are providing new host records for this species for the state of São Paulo, as well as SEM images and the first partial sequences of Brazilian specimens.

A review on trombiculiasis: An underreported parasitosis that affects humans and animals, including world distribution, clinical findings, associated pathogens, prophylaxis and identification methods.

Chigger mites comprise three families: Trombiculidae, Leeuwenhoekiidae and Walchiidae, with over 3,000 species worldwide. Their life cycle includes six stages, and the larvae are parasites, while the other stages are free-living predators. Once attached to a host, the larvae spend several days feeding on the host's epithelial tissue, forming the stylostome.