Assessment of a regulatory sanitization process in Egyptian dairy plants in regard to the adherence of some food-borne pathogens and their biofilms

Bayoumi, Mohamed A.; Kamal, Rania M.; Aal, Salah F. Abd El; Awad, Elmutaz Atta

doi:10.1016/j.ijfoodmicro.2012.07.021

Cited by 33 publications

(25 citation statements)

References 59 publications

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“…Despite efforts to maintain the cleanliness of food packages, a very short contacting time is enough for bacteria to attach and form biofilms. Therefore, control of the bacterial adhesion plays an important role in maintaining the food quality [40]. In the adherence test, the initial adhesion was measured, which is the interaction between the cell surface and the material surface.…”

Section: Antibacterial Activitymentioning

confidence: 99%

New PLA/ZnO:Cu/Ag bionanocomposites for food packaging

Vasile¹,

Râpă²,

Ştefan³

et al. 2017

Express Polym. Lett.

102

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Section: Antibacterial Activitymentioning

confidence: 99%

New PLA/ZnO:Cu/Ag bionanocomposites for food packaging

Vasile¹,

Râpă²,

Ştefan³

et al. 2017

Express Polym. Lett.

102

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“…This practice is used worldwide in order to increase the shelf-life of this highly perishable food product (Ivy et al 2012). After pasteurization, cleaning in place (CIP) processes are designed in order to maintain a clean and hygienic environment, including piping and fitting systems (Bayoumi et al 2012). Bacteria surviving pasteurization and CIP processes could compromise quality and safety of the pasteurized milk and dairy products manufactured with pasteurized milk.…”

Section: Introductionmentioning

confidence: 99%

Diversity and biofilm-forming capability of bacteria recovered from stainless steel pipes of a milk-processing dairy plant

Cherif-Antar

Moussa–Boudjemâa

Didouh

et al. 2015

Dairy Sci. & Technol.

105

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Bacteria may adhere to and develop biofilm structures onto dairy surfaces trying to protect themselves from adverse conditions such as pasteurization and CIP processes. Thus, biofilms are considered common sources of food contamination with undesirable bacteria. The purpose of this study was to evaluate the diversity of the microbiota attached to stainless steel surfaces in pre-and post-pasteurization pipe lines of a milk-processing plant. Seventy Gram-positive isolates were identified as Enterococcus faecalis (33), Bacillus cereus (26), Staphylococcus hominis (8), Staphylococcus saprophyticus (2), and Staphylococcus epidermidis-Staphylococcus aureus (1) species. Fifty-five Gram-negative isolates were identified to the species Escherichia coli (18), Klebsiella pneumoniae (13), Acinetobacter calcoaceticus (6), Serratia marcescens (6), Enterobacter spp. (5), Pseudomonas aeruginosa (4), Escherichia vulneris (2), and Proteus mirabilis (1). Fifty-five different strains were detected by the RAPD technique. These were subjected to an in vitro assay to evaluate their biofilm-forming capability. E. faecalis (7), A. calcoaceticus (4), K. pneumoniae (3), S. hominis (3), and P. aeruginosa (2) were the species in which more biofilm producer strains were encountered. The adhered microbiota was also assessed by the PCR-DGGE culture-independent technique. This analysis revealed a greater bacterial diversity than that revealed by culturing methods. In this way, in addition to the bacteria detected by culturing, DNA bands belonging to the genera Chrysobacterium and Streptomyces were also identified. This study emphasizes that knowledge of attached Dairy Sci. & Technol. (2016) 96:27-38 DOI 10.1007

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“…Bacterial counts and SEM indicated that Salmonella spp. strains were able to form biofilms on polypropylene, consistent with previous reports (Oliveira et al ., ; Iibuchi et al ., ; Bayoumi et al ., ). This result is important when considering that polypropylene is currently used in food processing environments and biofilms can be a persistent source of contamination that compromises food safety and human health (Steenackers et al ., ; Cappitelli et al ., ; Bridier et al ., ).…”

Section: Resultsmentioning

confidence: 97%

“…Overnight cultures of Salmonella spp. were diluted 1:100 in tryptic soy broth (TSB; Difco) to yield 10 7 CFU mL À1 , which were then added to microtubes that contained polypropylene coupons (1 9 8 9 8 mm), previously hygienised and sterilised in autoclave, according to Bayoumi et al (2012). The microtubes were incubated at 37°C for 24 h, and the contents were carefully replaced by new TSB and incubated for another 24 h at 37°C.…”

Section: Biofilm Formation On Polypropylene Surfacesmentioning

confidence: 99%

“…biofilms can exist on various surfaces in the food processing industry, such as plastic, glass, metal and wood (Steenackers et al, 2012). Polypropylene surfaces are widely used in food processing environments, and several studies have reported the occurrence of bacterial biofilms on these surfaces (Arutchelvi et al, 2011;Bayoumi et al, 2012;Millezi et al, 2012;Stoodley et al, 2012;Santos J unior et al, 2013); however, few studies have demonstrated biofilm formation of Salmonella spp. on polypropylene (Oliveira et al, 2006;Iibuchi et al, 2010;Bayoumi et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Effect of carvacrol and thymol on Salmonella spp. biofilms on polypropylene

Amaral

Santos

Silva

et al. 2015

Int J of Food Sci Tech

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Summary The present study evaluated the effects of carvacrol and thymol against Salmonella spp. biofilm on polypropylene. The efficacy of the compounds was assessed by quantifying Salmonella spp. cells during and after biofilm formation on polypropylene and performing scanning electron microscopy. During biofilm formation, carvacrol and thymol, at subinhibitory concentrations, reduced bacterial counts about 1–2 log, while established Salmonella spp. biofilms were reduced about 1–5 log by carvacrol and thymol, at MIC or 2× MIC. The greatest reduction in carvacrol‐treated biofilms, about 5 log, was observed with 156 and 312 μg mL−1 (MIC and 2× MIC) in established Salmonella Typhimurium ATCC 14028 biofilms. Thymol showed the greatest reduction, about 4 log, at 624 μg mL−1 (2× MIC) against mature Salmonella Enteritidis biofilm. Carvacrol and thymol reduced the number of Salmonella spp. cells on polypropylene, suggesting their potential for the control of Salmonella spp. biofilms.

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Assessment of a regulatory sanitization process in Egyptian dairy plants in regard to the adherence of some food-borne pathogens and their biofilms

Cited by 33 publications

References 59 publications

New PLA/ZnO:Cu/Ag bionanocomposites for food packaging

New PLA/ZnO:Cu/Ag bionanocomposites for food packaging

Diversity and biofilm-forming capability of bacteria recovered from stainless steel pipes of a milk-processing dairy plant

Effect of carvacrol and thymol on Salmonella spp. biofilms on polypropylene

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