In Vitro Activity of Quaternary Ammonium in Isolated from Clinical Bovine Mastitis Identified by Mass Spectrometry and PCR Sequencing of the Gene Marker.

The in vitro algaecide activity of quaternary ammonium (QA) against isolated from bovine clinical mastitis was investigated, in which the clinical severity was scored, milk samples were subjected to microbiological culture, and algal species were identified by molecular typing. A total of 4275 milk clinical samples of different cows from ten large dairy farms were used. Forty-four (1%) samples of cows from three dairy farms yielded growth of , of which 88.

Flies (Insecta, Diptera) collected in the environment of dairy farms as carriers of Rotavirus A and betacoronavirus.

Aims: We aimed to investigate the prevalence of rotavirus and coronavirus in dipterans that commonly inhabit the environment of dairy farms.

Methods And Results: We collected 217 insect specimens from nine dairy farms, which were examined through hemi-nested RT-PCR followed by Sanger sequencing in search of VP1 and N genes for rotavirus and bovine coronavirus-BCoV, respectively. With a predominance of Muscidae (152/217 = 70%) 11 families of Diptera were identified.

Genome-Based Characterization of Multidrug-Resistant Escherichia coli Isolated from Clinical Bovine Mastitis.

Mastitis occurrence in dairy cows is a broad topic that involves several sectors, from antimicrobial resistance and virulence of strains to economic implications and cattle management practices. Here, we assessed the molecular characterization (antimicrobial resistance determinants, virulence genes, sequences type, serotypes, and plasmid types) of 178 Escherichia coli strains isolated from milk samples from cows with clinical mastitis using a genome-based k-mers approach. Of these, 53 (29.

Leptospirosis diagnosis among patients suspected of dengue fever in Brazil.

Background: The early symptoms of leptospirosis and dengue fever are difficult to distinguish and can cause diagnostic confusion. Due to the large dengue epidemics that has occurred in Brazil in recent years, it is possible that cases of leptospirosis were unreported. Therefore, we performed a retrospective study to detect leptospirosis in patients who were tested for dengue, but whose laboratory diagnoses were negative.

Detection of clinical bovine mastitis caused by in Brazil.

The work reported in this research communication investigated the occurrence of Mycoplasma bovis (M. bovis) in milk samples from cows with clinical mastitis on dairy farms from seven Brazilian states. We hypothesized that M.

New Genotypes of Circulating in Brazil and Argentina.

, the zoonotic agent of Q fever, has a worldwide distribution. Despite the vast information about the circulating genotypes in Europe and North America, there is a lack of data regarding strains in South America. Here, we show the presence of novel multispacer sequence typing (MST) genotypes of in two clusters detected in Brazil and Argentina that seem to be distant in parenthood.

Serosurvey of and spp. in Free-Range Agoutis () from an Urban Area of Southern Brazil.

Thirty-six free-ranging agoutis () from an urban area of the municipality of Curitiba, a southern region of Brazil, were tested for antibodies against and spp. Antibodies were present in 25% and 6% agoutis, respectively. No statistical differences were observed based on sex, age, and body mass of the agoutis.

Serologic Screening for Smooth sp. in Wild Animals in Brazil.

Antibodies against smooth were investigated in serum samples of 526 freeranging mammals (21 species) in Brazil. All animals were seronegative, which indicated lowlevel exposure to these bacteria.

Serosurvey of Leptospira spp. and Toxoplasma gondii in rats captured from two zoos in Southern Brazil.

Introduction: Norway rats (Rattus norvegicus) are zoonotic reservoirs for Leptospira spp. and Toxoplasma gondii, and influence diseases in urban areas.

Methods: Free-ranging and laboratory-raised rats from two zoos in southern Brazil were tested for Leptospira spp.

Short communication: The first report of Cyberlindnera rhodanensis associated with clinical bovine mastitis.

An acute case of clinical mastitis in a Holstein cow from second lactation is reported here. A milk sample from the affected quarter was cultured on 5% bovine blood agar and incubated at 37°C for 72 h. After 24 h of incubation, numerous colonies of yeast were observed: the Candida characteristic was not detected by CHROMagar Candida (Difco, Franklin Lakes, NJ).

Investigation of Toxoplasma gondii in semen, testicle and epididymis tissues of primo-infected cats (Felis catus).

This study aimed to investigate the presence of Toxoplasma gondii in semen, testicle and epididymis tissues of cats experimentally infected by this coccidium. A total of 12 male felines without a definite breed that were of reproductive age and serologically negative for T. gondii were selected and distributed to the following three experimental groups: GI, inoculated with 600 tissue cysts of the P strain of T.

Short communication: Identification of Corynebacterium bovis by MALDI-mass spectrometry.

Corynebacterium bovis is a mastitis-causing microorganism responsible for economic losses related to decrease in milk production. The aim of the study was identify Corynebacterium spp. strains recovered from milk samples of subclinical mastitis by using matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS).