Evidence for Horizontal Transmission and Recirculation of Shiga Toxin-Producing in the Beef Production Chain in South Africa Using Whole Genome Sequencing.

We used whole genome sequencing (WGS) as an epidemiologic surveillance tool to elucidate the transmission dynamics of Shiga toxin-producing (STEC) strains along the beef production chain in South Africa. Isolates were obtained from a cattle farm, abattoirs and retail outlets. Isolates were analysed using WGS on a MiSeq platform (Illumina, San Diego, CA, USA) and phylogenetic analysis was carried out.

Antimicrobial Resistance Profiles of Listeria Species Recovered from Retail Outlets in Gauteng Province, South Africa.

The study determined the antimicrobial resistance (AMR) profiles of Listeria spp. (L. monocytogenes, L.

Absence of Tuberculosis-Causing from Slaughtered Livestock Tissues and Environmental Samples, Gauteng Province, South Africa.

complex (MTBC) is a group of bacteria responsible for causing tuberculosis in animals and humans. In South Africa (S.A), slaughterhouses are registered by the government and closely inspected and audited for hygienic slaughter practices.

Brucellosis Seropositivity Using Three Serological Tests and Associated Risk Factors in Abattoir Workers in Gauteng Province, South Africa.

Abattoir workers are liable to zoonotic infections from animals and animal products, primarily to diseases with asymptomatic and chronic clinical manifestations in animals, such as brucellosis. No published reports exist on the seroprevalence of brucellosis in abattoir workers in South Africa. Therefore, this cross-sectional study was conducted to estimate the occurrence and risk factors for exposure in abattoir workers in Gauteng Province.

Q fever and toxoplasmosis in South African livestock and wildlife: a retrospective study on seropositivity, sporadic abortion, and stillbirth cases in livestock caused by Coxiella burnetii.

Background: Q fever and toxoplasmosis are economically important zoonoses as they cause considerable losses in livestock (cattle, sheep and goats) and wildlife (antelopes, giraffes, lions, and cheetahs) through reproductive disorders such as abortions and stillbirths. Q fever and toxoplasmosis testing in South Africa is conducted by the Agricultural Research Council-Onderstepoort Veterinary Research (ARC-OVR). However, both zoonoses are understudied and not monitored in South Africa as they are not considered controlled or notifiable diseases in the Animal Disease Act 35 of 1984.

Molecular Characterization of Species Detected in the Kidneys of Slaughtered Livestock in Abattoirs in Gauteng Province, South Africa.

was investigated in kidneys ( = 305) from slaughtered livestock in the Gauteng Province abattoirs, South Africa, using a culture medium to isolate , followed by the qPCR to detect DNA. The gene region was amplified, sequenced, and analyzed for qPCR-positive samples or isolates. The overall frequency of isolation of spp.

Identification of and Multilocus Variable-Number Tandem Repeat Analysis (MLVA) Typing of and Isolates from Cattle Farms and Beef and Beef-Based Products from Retail Outlets in Mpumalanga and North West Provinces, South Africa.

In this study, Listeria isolates (214) were characterized as follows: L. innocua (77.10%), L.

Immune response at a vaccine-challenge study using beagle dogs and locally isolated Leptospira spp.

Determination of the immune response of dogs by measuring the antibody levels (utilizing MAT) and levels of cytokines (TNF-α, IL-4 and IFN-γ) post-vaccination with locally produced killed whole-celled Leptospiral vaccine and post-challenge with a locally isolated Leptospira icterohaemorrhagiae Copenhageni strain. For assessment of immunity of the vaccine serum antibodies were detected before and after vaccination and challenge in three studies. The effects of the challenge were determined by a variety of parameters including reisolation of the challenge Leptospira spp.

Phylogenetic analyses of Salmonella detected along the broiler production chain in Trinidad and Tobago.

This study was conducted to determine the phylogenies of Salmonella strains isolated from cross-sectional studies conducted at hatcheries, broiler farms, processing plants, and retail outlets (broiler production chain) in Trinidad and Tobago over 4 yr (2016-2019). Whole-genome sequencing (WGS) was used to characterize Salmonella isolates. Core genome phylogenies of 8 serovars of public health significance were analyzed for similarities in origin and relatedness.

Occurrence of methicillin-resistant Staphylococcus aureus in pets and their owners in rural and urban communities in Trinidad.

Introduction: The occurrence of methicillin-resistant Staphylococcus aureus (MRSA) in pets and their owners has increased due to the misuse and abuse of antibiotics. This study compared the prevalence of MRSA and Staphylococcus aureus strains in pets and their owners in urban and rural communities in Trinidad.

Methodology: Questionnaires were administered to gather demographic and risk factor data for MRSA for human participants, and their pets.

Prevalence and Characterization of Campylobacter Species from Chickens Sold at Informal Chicken Markets in Gauteng, South Africa.

Abstract: This study determined the prevalence, characteristics, and risk factors of Campylobacter species contamination of chicken carcasses sold at informal poultry outlets in Gauteng province, South Africa. Within six townships, 151 chicken carcasses were collected from 47 outlets. Carcass swab, cloacal swab, and carcass drip samples were collected from each chicken, along with a matched questionnaire on risk factors regarding Campylobacter contamination.

Characterisation and epidemiological subtyping of Shiga toxin-producing Escherichia coli isolated from the beef production chain in Gauteng, South Africa.

In South Africa, there is a shortage of epidemiologic data on Shiga toxin-producing Escherichia coli (STEC) in the beef production chain. This study was conducted to characterise STEC isolates originating from three studies conducted in a cattle feedlot, beef abattoirs and retail outlets in Gauteng province, South Africa. Polymerase chain reaction was used to detect virulence genes, the Epsilometer test to assess antimicrobial susceptibility, pulsed-field gel electrophoresis (PFGE) to investigate genetic relatedness of isolates, and conventional serotyping for phenotypic identification.

Molecular Characterization of Detected along the Broiler Production Chain in Trinidad and Tobago.

This cross-sectional study determined the serovars, antimicrobial resistance genes, and virulence factors of isolated from hatcheries, broiler farms, processing plants, and retail outlets in Trinidad and Tobago. in silico serotyping detected 23 different serovars where Kentucky 20.5% (30/146), Javiana 19.

Occurrence, Risk Factors, Serotypes, and Antimicrobial Resistance of Salmonella Strains Isolated from Imported Fertile Hatching Eggs, Hatcheries, and Broiler Farms in Trinidad and Tobago.

Abstract: This cross-sectional study was conducted to determine the occurrence, risk factors, and characteristics of Salmonella isolates recovered from imported fertile broiler hatching eggs, hatcheries, and broiler farms in Trinidad and Tobago. Standard methods were used to isolate and characterize Salmonella isolates from two broiler hatcheries and 27 broiler farms in the country. The frequency of isolation of Salmonella was 0.

Characterization of Isolates Recovered from Stages of the Processing Lines at Four Broiler Processing Plants in Trinidad and Tobago.

This cross-sectional study determined the prevalence, characteristics, and risk factors for contamination of chicken with at four operating broiler processing plants in Trinidad. Standard methods were used to isolate and characterize the isolates. The overall prevalence of at the four processing plants was 27.

Closed Genome Sequence of a Salmonella enterica Serotype Senftenberg Strain Carrying the Gene Isolated from Broken Chicken Eggshells in Trinidad and Tobago.

Salmonella enterica is a highly important foodborne pathogen worldwide. We report the complete genome sequence of a sequence type 14 Salmonella enterica serotype Senftenberg strain carrying the gene in a plasmid isolated from broken chicken eggshells in Trinidad and Tobago, obtained by using a combination of long- and short-read sequencing.

Antimicrobial Resistance Profiles of Isolates on Chickens Processed and Retailed at Outlets of the Informal Market in Gauteng Province, South Africa.

The study determined the antimicrobial resistance profiles of on chickens processed and retailed at outlets of the informal markets in Gauteng province, South Africa. The study also investigated the relationship of antimicrobial resistant to the source and type of samples and their serotypes. Carcass swabs, cloacal swabs and carcass drips were randomly collected from each of 151 slaughtered chickens from six townships.