Fitness Differences Between Listeria monocytogenes Serotypes 1/2a, 4b, and 4bv-1 in Competition for Growth on Lettuce Leaf Sections.

Listeria monocytogenes is a foodborne pathogen that lives in nature as a saprophyte. Two of the three most common serotypes that cause foodborne listeriosis are 1/2a and 4b. Within serotype 4b, there is a variant called 4bv-1.

Growth assessment of Salmonella enterica multi-serovar populations in poultry rinsates with commonly used enrichment and plating media.

Isolation of Salmonella from enrichment cultures of food or environmental samples is a complicated process. Numerous factors including fitness in various selective enrichment media, relative starting concentrations in pre-enrichment, and competition among multi-serovar populations and associated natural microflora, come together to determine which serovars are identified from a given sample. A recently developed approach for assessing the relative abundance (RA) of multi-serovar Salmonella populations (CRISPR-SeroSeq or Deep Serotyping, DST) is providing new insight into how these factors impact the serovars observed, especially when different selective enrichment methods are used to identify Salmonella from a primary enrichment sample.

The Sigatoka Disease Complex Caused by spp. and Other Fungal Pathogens Associated with spp. in Puerto Rico.

Bananas ( spp.) are among the world's most economically important staple food crops. The most important fungal leaf diseases of spp.

Comparison of Phenotype Nutritional Profiles and Phosphate Metabolism Genes in Four Serovars of from Water Sources.

The surveillance of foods for is hindered by bias in common enrichment media where serovars implicated in human illness are outgrown by less virulent serovars. We examined four serovars, two common in human illness (Enteritidis and Typhimurium) and two that often dominate enrichments (Give and Kentucky), for factors that might influence culture bias. The four serovars had similar growth kinetics in Tryptic Soy Broth and Buffered Peptone Water.

First Report of Causing Necrotic Spots and Leaf Blight on Rambutan in Puerto Rico.

Rambutan () is a tropical exotic fruit belonging to the Sapindaceae family. Several pathogens have been identified in rambutan causing different diseases on fruits, inflorescences, and branches (Serrato-Diaz et al., 2015, 2017, 2020) but few on leaves.

Salmonella enterica Serovar Diversity, Distribution, and Prevalence in Public-Access Waters from a Central California Coastal Leafy Green-Growing Region from 2011 to 2016.

Prevalence and serovar diversity of Salmonella enterica were measured during a 5-year survey of surface waters in a 500-mi agricultural region of the Central California Coast. Rivers, streams, lakes, and ponds were sampled bimonthly resulting in 2,979 samples. Overall prevalence was 56.