Eimeria atricillae n. sp. (Apicomplexa: Eimeriidae) from the laughing gull Leucophaeus atricilla (Linnaeus) (Aves: Charadriiformes: Laridae) in Port Isabel, Texas.

A new coccidian species, Eimeria atricillae n. sp. (Apicomplexa: Eimeriidae) collected from the laughing gull Leucophaeus atricilla, is reported from Port Isabel, Texas, USA.

First Report of Intestinal Cestode Infection in a Berylline Hummingbird (Saucerottia beryllina) in Mexico.

Background: Up to now, five cestode species have been reported infecting five hummingbird species. To date, there have been no reports of cestode infections in hummingbirds in Mexico.

Methods: A Berylline hummingbird (Saucerottia beryllina) was found dead in a backyard at Toluca City, Mexico, and a window collision was assumed as the cause of death.

Recommendation of a standardized broth microdilution method for antimicrobial susceptibility testing of and resistance monitoring.

Unlabelled: This study aimed to develop a method for standardized broth microdilution antimicrobial susceptibility testing (AST) of (.) , the causative agent of infectious coryza in chickens. For this, a total of 83 isolates and strains were collected from 15 countries.

n. sp. (Apicomplexa: Eimeriidae) from the American white pelican Gmelin, 1789 (Pelecaniformes: Pelecanidae) in Toluca, Mexico.

A new coccidian species, n. sp. (Apicomplexa: Eimeriidae) collected from the American white pelican Gmelin 1789, is reported from Toluca city, Mexico.

Brief report: Isospora gilvusi n. sp. (Apicomplexa: Eimeriidae) from the warbling vireo Vireo gilvus Vieillot (Passeriformes: Vireonidae) in Morelia, Mexico.

A new coccidian species, Isospora gilvusi n. sp. (Apicomplexa: Eimeriidae) collected from the warbling vireo Vireo gilvus, is reported from Morelia, Michoacán State, Mexico.

Molecular characterization of the gene of and the proposition of a new genotyping method as alternative for classical serotyping.

is the aetiological agent of infectious coryza (IC) in chickens and characterized by acute respiratory distress and severe drop in egg production. Vaccination is important in the control of IC outbreaks and the efficacy of vaccination is dependent on serovars included in the vaccine. Classical serotyping of is laborious and hampered by poor availability of antigens and antisera.

Isospora speciosae n. sp. (Apicomplexa: Eimeriidae) from the black-polled yellowthroat Geothlypis speciosa Sclater, 1859 (Passeriformes: Parulidae) in Ciénegas del Lerma, Mexico.

A new coccidian species, Isospora speciosae n. sp. (Apicomplexa: Eimeriidae) collected from the black-polled yellowthroat Geothlypis speciosa Sclater, is reported from the marsh Ciénegas del Lerma Natural Protected Area, Mexico.

Enteroparasites from the American White Pelican (Pelecanus erythrorhynchos) in Toluca Valley, Mexico.

We examined 82 fresh fecal samples from American White Pelican (Pelecanus erythrorhynchos) at San Pablo Autopan, Toluca Valley, central Mexico, December 2021 to April 2022. Eggs of Contracaecum spp. were observed in 100%, Capillaria spp.

First Record of the Rare Species from Rainbow Trout (, Walbaum): Comparative Analysis with the Existing Strains.

The species was first described in 2016 with five strains recovered from untreated water and vegetables from Portugal. Since then, no further records exist of this species. During a surveillance study on the presence of in fish farms in Mexico, a new strain (ESV-351) of the mentioned species isolated from a rainbow trout was recovered.

Characterization of commensal Escherichia coli isolates from slaughtered sheep in Mexico.

Introduction: Commensal Escherichia coli is defined as bacteria without known virulence factors that could be playing a specific role in some diseases; however, they could be responsible to disseminate antimicrobial resistance genes to other microorganisms. This study aimed to characterize the commensal E. coli isolates obtained from slaughtered sheep in the central region of Mexico.

Identification, HPG2 Sequence Analysis, and Antimicrobial Susceptibility of Isolates Obtained from Outbreaks of Infectious Coryza in Commercial Layers in Sonora State, Mexico.

This is the first extensive report on the identification and characterization of (AVP) isolates obtained from outbreaks of infectious coryza (IC) in IC-vaccinated layer flocks from Sonora State in Mexico. Isolates obtained from IC outbreaks during the years 2007, 2014, 2015, 2017, and 2019 were identified by conventional PCR test and 16S rRNA gene analysis, serotyped by Page serotyping and genotyped by the recently described partial sequence analysis of the HPG2 region. Furthermore, antimicrobial susceptibility profiles were determined by a recently improved minimal inhibitory concentration (MIC) test.

In vitro transduction of antimicrobial resistance genes into isolates from backyard poultry in Mexico.

The transmission of multidrug-resistant pathogens and antimicrobial resistance genes is an emerging problem involving multiple factors (humans, domestic animals, wildlife). The aim of this study was to investigate the presence of isolates with different antimicrobial resistance genes from backyard poultry and to demonstrate the in vitro transduction phenomenon of these genes between phages from migratory wild birds and poultry isolates. We collected 197 isolates from chickens, turkeys, and ducks in backyard production units (northern region of the State of Mexico).

Isospora dipperia n. sp. (Apicomplexa: Eimeriidae) from the American dipper Cinclus mexicanus Swainson (Passeriformes: Cinclidae) in Yosemite National Park, USA.

Isospora dipperia n. sp. is described from the feces of the American dipper Cinclus mexicanus Swainson collected in Yosemite National Park, California, USA.

The common gallinule, Gallinula galeata (Aves: Gruiformes: Rallidae), as a new host for Eimeria paludosa (Apicomplexa: Eimeriidae) in Mexico.

Up to now, four coccidian species have been identified in Rallidae (Aves: Gruiformes): Eimeria mongolica, E. alakuli, E. paludosa and E.

A new species of Acroeimeria Paperna & Landsberg, 1989 (Apicomplexa: Eimeriidae) in Wiegmann's torquate lizard Sceloporus torquatus torquatus Weigmann (Sauria: Phrynosomatidae) from Toluca Valley, México.

A new species of Acroeimeria Paperna & Landsberg, 1989 is described from Wiegmann's torquate lizard Sceloporus torquatus torquatus Wiegmann from Toluca, México. Oöcysts of Acroeimeria wiegmanni n. sp.

Cystoisospora felis infection in a captive jaguar cub (Panthera onca) in Michoacán, México.

Cystoisospora felis (Wenyon 1923) was identified in a 3-month-old, captive jaguar (Panthera onca) presenting with signs of gastrointestinal distress. The cub was fed beef, chicken, and commercial diet. Examination of fresh feces detected large (47.

Haemoparasites in endemic and non-endemic passerine birds from central Mexico highlands.

Haemosporidian parasites of birds are found worldwide and include the genera , and . Infection with haemosporidian parasites can affect host physical condition and reproductive success. The aim of this study was to identify the blood parasites and parasitaemia in endemic and non-endemic passerine birds from central Mexico highlands.

Isospora phainopepla n. sp. (Apicomplexa: Eimeriidae) from Phainopepla nitens (Swainson) (Passeriformes: Ptiliogonatidae) in the Joshua Tree National Park, USA.

Isospora phainopepla n. sp. is described from the faeces of Phainopepla nitens (Swainson) collected in Joshua Tree National Park, California, USA.

Isospora toxostomai n. sp. (Apicomplexa: Eimeriidae) from the curved-billed thrasher Toxostoma curvirostre (Swainson) (Passeriformes: Mimidae) at the Central highlands of Mexico.

Isospora toxostomai n. sp. (Apicomplexa: Eimeriidae) is described based on material from the curved-billed thrasher Toxostoma curvirostre (Swainson) in the Central Highlands of Mexico.

Molecular Identification and Virulence Potential of the Genus Isolated from Wild Rainbow Trout () in Mexico.

The members of the genus are important foodborne pathogens, with a worldwide distribution. Wild rainbow trout, from the national protected area Santuario del Agua State Park, Corral de Piedra, were analyzed. Species of were isolated from the trout, and their pathogenic potential was analyzed based on different pathogenicity and virulence factors.

Identification and characterization of Dutch isolates and the implications for diagnostics.

This study reports the results of diagnostic and molecular typing methods for 18 isolates obtained from outbreaks of infectious coryza in commercial layer flocks in the Netherlands. Isolation, biochemical identification, species-specific PCR tests and classical serotyping were performed. In addition, molecular typing by Enterobacterial Repetitive Intergenic Consensus-Based Polymerase Chain Reaction (ERIC-PCR) and sequence analysis of the partial HPG2 region of were applied and results of both techniques were compared.

Eimeria aegoliusia n. sp. (Sporozoa: Eimeriidae) from the northern saw-whet owl Aegolius acadicus (Gmelin) (Strigiformes: Strigidae) in Mexico.

A new coccidian species (Chromista: Sporozoa: Eimeriidae) collected from the northern saw-whet owl Aegolius acadicus (Gmelin) is reported from Mexico. Eimeria aegoliusia n. sp.

The canary (Passeriformes: Fringillidae) as a new host for in Mexico.

(Cringoli and Quesada 1991) (Protozoa, Apicomplexa, Eimeriidae) is reported and described from captive canaries forma (Linnaeus 1758) in Mexico. The oöcysts are subspherical, 25.5 × 23.

Urinary bladder worm (Pearsonema sp.) infection in domestic dogs and cats in Mexico at a high altitude.

Urinary bladder worm infection is relatively uncommon in pet dogs and cats in the Americas. This report describes the diagnosis of lower urinary tract infection by Pearsonema plica in two asymptomatic dogs and P. feliscati in a cat with lower urinary tract clinical signs diagnosed between 2002 and 2015, and the first report of this type of parasitism in domestic small animals in Mexico at an altitude above 2600 m above sea level.

Phylogenetic relationship of Ornithobacterium rhinotracheale strains.

The bacterium Ornithobacterium rhinotracheale is associated with respiratory disease in wild birds and poultry. In this study, the phylogenetic analysis of nine reference strains of O. rhinotracheale belonging to serovars A to I, and eight Mexican isolates belonging to serovar A, was performed.