Metabiosis of proteolytic moulds and Salmonella in raw, ripe tomatoes

Wade, W. N.; Beuchat, Larry R.

doi:10.1046/j.1365-2672.2003.01995.x

Cited by 30 publications

(17 citation statements)

References 26 publications

(51 reference statements)

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“…While BFIs are exploited for the production of certain foods, fungi and bacteria are also key food spoilage organisms; however, few studies have examined whether BFIs contribute to food spoilage, perhaps due to an emphasis on diagnostics/systematics and shelf life prediction within the food industry (327). Some studies have examined the potential of fungi to assist colonization by human-pathogenic bacteria; for example, spoilage fungi on tomatoes can promote Salmonella colonization, an effect which is believed to be due to their effect on pH (393,394). The presence of rhizonin toxins produced by endobacteria inhabiting Rhizopus microsporus is a critical cause of food spoilage due to their hepatotoxicity (296).…”

Section: Food Processingmentioning

confidence: 99%

Bacterial-Fungal Interactions: Hyphens between Agricultural, Clinical, Environmental, and Food Microbiologists

Frey‐Klett

Burlinson

Deveau

et al. 2011

Microbiol Mol Biol Rev

719

531

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SUMMARY Bacteria and fungi can form a range of physical associations that depend on various modes of molecular communication for their development and functioning. These bacterial-fungal interactions often result in changes to the pathogenicity or the nutritional influence of one or both partners toward plants or animals (including humans). They can also result in unique contributions to biogeochemical cycles and biotechnological processes. Thus, the interactions between bacteria and fungi are of central importance to numerous biological questions in agriculture, forestry, environmental science, food production, and medicine. Here we present a structured review of bacterial-fungal interactions, illustrated by examples sourced from many diverse scientific fields. We consider the general and specific properties of these interactions, providing a global perspective across this emerging multidisciplinary research area. We show that in many cases, parallels can be drawn between different scenarios in which bacterial-fungal interactions are important. Finally, we discuss how new avenues of investigation may enhance our ability to combat, manipulate, or exploit bacterial-fungal complexes for the economic and practical benefit of humanity as well as reshape our current understanding of bacterial and fungal ecology.

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Section: Food Processingmentioning

confidence: 99%

Bacterial-Fungal Interactions: Hyphens between Agricultural, Clinical, Environmental, and Food Microbiologists

Frey‐Klett

Burlinson

Deveau

et al. 2011

Microbiol Mol Biol Rev

719

531

View full text Add to dashboard Cite

show abstract

“…Surveys of commercial produce have indicated that there is an increased likelihood of finding Salmonella in association with tissue that is damaged by soft-rot pathogens when compared with healthy tissue (Brandl, 2008;Wells & Butterfield, 1997). Positive effects on human pathogen growth have also been observed with some fungal plant pathogens (Wade & Beuchat, 2003).…”

Section: Interactions Between the Human Pathogenic Bacteria And Othermentioning

confidence: 99%

Internalization of E. coli O157:H7 and Salmonella spp. in plants: A review

Deering

Mauer

Pruitt

2012

Food Research International

148

132

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“…Spoilage also had a positive effect on the colonization of endive leaves by Listeria monocytogenes (11), whereas the pathogen was inhibited strongly in potato tuber slices infected with Pseudomonas fluorescens and Pseudomonas viridiflava, possibly due to iron competition (12). Furthermore, it was reported previously that some plant-pathogenic fungi are more likely to increase the proliferation of human pathogens in infected fruit tissue by neutralizing the pH in the lesions and thereby enabling bacterial growth (13)(14)(15).…”

mentioning

confidence: 91%

The Salmonella Transcriptome in Lettuce and Cilantro Soft Rot Reveals a Niche Overlap with the Animal Host Intestine

Goudeau

Parker

Zhou

et al. 2013

Appl Environ Microbiol

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bFresh vegetables have been recurrently associated with salmonellosis outbreaks, and Salmonella contamination of retail produce has been correlated positively with the presence of soft rot disease. We observed that population sizes of Salmonella enterica serovar Typhimurium SL1344 increased 56-fold when inoculated alone onto cilantro leaves, versus 2,884-fold when coinoculated with Dickeya dadantii, a prevalent pathogen that macerates plant tissue. A similar trend in S. enterica populations was observed for soft-rotted lettuce leaves. Transcriptome analysis of S. enterica cells that colonized D. dadantii-infected lettuce and cilantro leaves revealed a clear shift toward anaerobic metabolism and catabolism of substrates that are available due to the degradation of plant cells by the pectinolytic pathogen. Twenty-nine percent of the genes that were upregulated in cilantro macerates were also previously observed to have increased expression levels in the chicken intestine. Furthermore, multiple genes induced in soft rot lesions are also involved in the colonization of mouse, pig, and bovine models of host infection. Among those genes, the operons for ethanolamine and propanediol utilization as well as for the synthesis of cobalamin, a cofactor in these pathways, were the most highly upregulated genes in lettuce and cilantro lesions. In S. Typhimurium strain LT2, population sizes of mutants deficient in propanediol utilization or cobalamin synthesis were 10-and 3-fold lower, respectively, than those of the wildtype strain in macerated cilantro (P < 0.0002); in strain SL1344, such mutants behaved similarly to the parental strain. Anaerobic conditions and the utilization of nutrients in macerated plant tissue that are also present in the animal intestine indicate a niche overlap that may explain the high level of adaptation of S. enterica to soft rot lesions, a common postharvest plant disease.T he association of food-borne illness with contaminated produce has prompted numerous investigations into the ability of human enteric pathogens to attach to and survive on fresh fruits and vegetables. Since enteric pathogens are unlikely to land on plants at high densities, it still remains unclear how they achieve the population sizes required to cause human illness at infectious doses in that habitat. Therefore, the factors that drive the growth of enteric pathogens on plants still need to be explored. We have previously demonstrated that Salmonella enterica and Escherichia coli serovar O157:H7 can multiply in the cilantro and lettuce phyllosphere under optimal conditions of warm temperatures and free water on the leaves (1, 2). Based on our observations that enteric pathogens appear less fit in the phyllosphere than plant-associated bacterial species, even under optimal growth conditions (2), and that their growth on middle-aged lettuce leaves is limited by nitrogen availability (1), we hypothesized that these human pathogens have not evolved to utilize the full range of nutrients present on leaf surfaces (3). The occurrenc...

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Metabiosis of proteolytic moulds and Salmonella in raw, ripe tomatoes

Cited by 30 publications

References 26 publications

Bacterial-Fungal Interactions: Hyphens between Agricultural, Clinical, Environmental, and Food Microbiologists

Bacterial-Fungal Interactions: Hyphens between Agricultural, Clinical, Environmental, and Food Microbiologists

Internalization of E. coli O157:H7 and Salmonella spp. in plants: A review

The Salmonella Transcriptome in Lettuce and Cilantro Soft Rot Reveals a Niche Overlap with the Animal Host Intestine

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