Effectiveness of Chemical Sanitizers against Campylobacter jejuni–Containing Biofilms

2002 ◽  
Vol 65 (7) ◽  
pp. 1117-1121 ◽  
Author(s):  
NATHANON TRACHOO ◽  
JOSEPH F. FRANK
Keyword(s):  
Mixed Culture ◽  
Polyvinyl Chloride ◽  
Campylobacter Jejuni ◽  
Peracetic Acid ◽  
Glass Beads ◽  
Acid Mixture ◽  
Pseudomonas Sp ◽  
Gram Positive ◽  
Brucella Broth ◽  
Chicken House

Survival of Campylobacter jejuni in mixed-culture biofilms was determined after treatment with chemical sanitizers including chlorine, quaternary ammonia, peracetic acid (PAA), and a PAA/peroctanoic acid mixture (PAA/POA). Biofilm-producing bacteria (gram-positive rods, Y1 and W1) were isolated from chicken house nipple drinkers. A meat plant isolate (Pseudomonas sp.) was also included as a biofilm producer. Two-day-old biofilms grown on polyvinyl chloride (PVC) plastic coupons in R2A broth at 12°C were incubated with 106 CFU/ml C. jejuni for 6 h to allow attachment. The coupons were then rinsed and incubated in fresh media for an additional 24 h. C. jejuni–containing biofilms were detached by vortexing with glass beads in modified brucella broth, which was then enumerated for C. jejuni on selective/differential media. The presence of biofilm enhanced (P < 0.01) the attachment and survival of C. jejuni. After the 24-h incubation, only 20 CFU/cm2 of C. jejuni were recovered from the control without biofilms compared to 2,500 to 5,000 CFU/cm2 in samples with preexisting biofilms. The presence of biofilm microflora decreased (P < 0.01) the effectiveness of sanitizers against C. jejuni. Chlorine was the most effective sanitizer since it completely inactivated C. jejuni in the biofilms after treatment at 50 ppm for 45 s. C. jejuni in biofilms was susceptible to all sanitizers tested but was not completely inactivated by treatment with quaternary ammonia, PAA, or PAA/POA mixture at 50 and 200 ppm for 45 s.

Inactivation of Listeria monocytogenes/Pseudomonas Biofilms by Peracid Sanitizers

1999 ◽  
Vol 62 (7) ◽  
pp. 761-765 ◽  
Author(s):  
PAYMAN FATEMI ◽  
JOSEPH F. FRANK
Keyword(s):  
Stainless Steel ◽  
Listeria Monocytogenes ◽  
Cell Suspension ◽  
Mixed Culture ◽  
Peracetic Acid ◽  
Skim Milk ◽  
Pseudomonas Sp ◽  
Mixed Cell ◽  
Initial Biofilm

The ability of peracetic acid and peroctanoic acid sanitizers to inactivate mixed-culture biofilms of a Pseudomonas sp. and Listeria monocytogenes on stainless steel was investigated. Types of biofilms tested included a 4-h attachment of the mixed-cell suspension and a 48-h biofilm of mixed culture formed in skim milk or tryptic soy broth. Biofilm-containing coupons were immersed in solutions of hypochlorite, peracetic acid, and peroctanoic acid either with or without organic challenge. Organic challenge consisted of either coating the biofilms with milk that were then allowed to dry, or adding milk to the sanitizing solution to achieve a 5% concentration. Surviving cells were enumerated by pouring differential agar directly on the treated surfaces. The peracid sanitizers were more effective than chlorine for inactivating biofilm in the presence of organic challenge. The 48-h mixed-culture biofilm grown in milk was reduced to less than 3 CFU/cm2 by 160 ppm of peracid sanitizer after 1 min of exposure. Peroctanoic acid was more effective than peracetic acid against biofilm cells under conditions of organic challenge. Pseudomonas and L. monocytogenes were inactivated to similar levels by the sanitizer treatments, even though Pseudomonas predominated in the initial biofilm population.

scholarly journals Inactivation of Prions by Low-Temperature Sterilization Technology Using Vaporized Gas Derived from a Hydrogen Peroxide–Peracetic Acid Mixture

Pathogens ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 24
Author(s):  
Akikazu Sakudo ◽  
Daiki Anraku ◽  
Tomomasa Itarashiki
Keyword(s):  
Hydrogen Peroxide ◽  
Medical Devices ◽  
Neurodegenerative Disorders ◽  
Peracetic Acid ◽  
Protein Misfolding ◽  
Prion Diseases ◽  
Proteinase K ◽  
Acid Mixture ◽  
Cover Glass ◽  
Standard Mode

Prion diseases are proteopathies that cause neurodegenerative disorders in humans and animals. Prion is highly resistant to both chemical and physical inactivation. Here, vaporized gas derived from a hydrogen peroxide–peracetic acid mixture (VHPPA) was evaluated for its ability to inactivate prion using a STERIACE 100 instrument (Saraya Co., Ltd.). Brain homogenates of scrapie (Chandler strain) prion-infected mice were placed on a cover glass, air-dried, sealed in a Tyvek package, and subjected to VHPPA treatment at 50–55 °C using 8% hydrogen peroxide and <10% peracetic acid for 47 min (standard mode, SD) or 30 min (quick mode, QC). Untreated control samples were prepared in the same way but without VHPPA. The resulting samples were treated with proteinase K (PK) to separate PK-resistant prion protein (PrPres), as a marker of the abnormal isoform (PrPSc). Immunoblotting showed that PrPres was reduced by both SD and QC VHPPA treatments. PrPres bands were detected after protein misfolding cyclic amplification of control but not VHPPA-treated samples. In mice injected with prion samples, VHPPA treatment of prion significantly prolonged survival relative to untreated samples, suggesting that it decreases prion infectivity. Taken together, the results show that VHPPA inactivates prions and might be applied to the sterilization of contaminated heat-sensitive medical devices.

THE INFLUENCE OF SOIL AND ROOT EXTRACTS ON THE ASSOCIATIVE GROWTH OF SELECTED SOIL BACTERIA

1963 ◽  
Vol 9 (2) ◽  
pp. 187-197 ◽  
Author(s):  
E. C. S. Chan ◽  
H. Katznelson ◽  
J. W. Rouatt
Keyword(s):  
Mixed Culture ◽  
Soil Bacteria ◽  
Agar Medium ◽  
Soil Extract ◽  
Antagonistic Effect ◽  
Pseudomonas Sp ◽  
Population Changes ◽  
Agrobacterium Radiobacter ◽  
Root Extracts ◽  
Wheat Population

These studies are concerned with the growth interrelationships of mixed cultures of five soil organisms in soil extract and root extracts of 2-, 4-, and 8-week-old oats, soybeans, and wheat. Population changes of Agrobacterium radiobacter, Arthrobacter citreus, Azotobacter chroococcum, Bacillus cereus, and a Pseudomonas sp. in pure and mixed culture were followed by plating on selective media. B. cereus and A. chroococcum grew poorly alone or in mixed culture in the extracts. In soil extract, A. citreus predominated over, or was nearly equal in number to, the Gram-negative forms (Pseudomonas and Agrobacterium). In root extracts, Pseudomonas sp. always predominated over A. citreus in mixed culture. A. radiobacter was inhibited in mature root extracts (8-week-old plants) although in pure culture it recovered after a period. An antagonistic effect of Pseudomonas sp. on A. chroococcum plated on nitrogen-free agar medium was found to be related to the kind of agar used.

Diluents and the Enumeration of Stressed Campylobacter jejuni

1985 ◽  
Vol 48 (2) ◽  
pp. 135-137 ◽  
Author(s):  
DEBRA D. ABRAM ◽  
NORMAN N. POTTER
Keyword(s):  
Campylobacter Jejuni ◽  
Phosphate Buffer ◽  
Aerobic Conditions ◽  
Brucella Broth ◽  
Peptone Water

Significant discrepancies in calculated counts of Campylobacter jejuni strains ATCC 33250 and 29428 were observed between undiluted samples and samples diluted in 0.1% peptone water when cultures had been incubated at 42°C under micro-aerobic conditions in brucella broth containing 2% NaCl. The influence of 0.1% peptone water, brucella broth and phosphate buffer as diluents for enumeration of C. jejuni stored at 6 and −18°C in brucella broth with 0.5 and 2% NaCl was studied. The three diluents were equally effective for the recovery of C. jejuni from refrigerated broth containing 0.5% NaCl. However, when the organism had been refrigerated in the broth with 2% NaCl or frozen in the broth with either level of salt, dilution with brucella broth produced significantly higher counts than dilution with 0.1% peptone water or phosphate buffer.

scholarly journals Characterization of Mono- and Mixed-Culture Campylobacter jejuni Biofilms

2011 ◽  
Vol 78 (4) ◽  
pp. 1033-1038 ◽  
Author(s):  
Tuba Ica ◽  
Vildan Caner ◽  
Ozlem Istanbullu ◽  
Hung Duc Nguyen ◽  
Bulbul Ahmed ◽  
...  
Keyword(s):  
Mixed Culture ◽  
Campylobacter Jejuni ◽  
Laser Scanning ◽  
Physiological State ◽  
Confocal Laser Scanning Microscope ◽  
Survival Strategies ◽  
Confocal Laser ◽  
Flow Rates ◽  
Content Type ◽  
Common Causes

ABSTRACTCampylobacter jejuni, one of the most common causes of human gastroenteritis, is a thermophilic and microaerophilic bacterium. These characteristics make it a fastidious organism, which limits its ability to survive outside animal hosts. Nevertheless,C. jejunican be transmitted to both humans and animals via environmental pathways, especially through contaminated water. Biofilms may play a crucial role in the survival of the bacterium under unfavorable environmental conditions. The goal of this study was to investigate survival strategies ofC. jejuniin mono- and mixed-culture biofilms. We grew monoculture biofilms ofC. jejuniand mixed-culture biofilms ofC. jejuniwithPseudomonas aeruginosa. We found that mono- and mixed-culture biofilms had significantly different structures and activities. MonocultureC. jejunibiofilms did not consume a measurable quantity of oxygen. Using a confocal laser scanning microscope (CLSM), we found that cells from monoculture biofilms were alive according to live/dead staining but that these cells were not culturable. In contrast, in mixed-culture biofilms,C. jejuniremained in a culturable physiological state. MonocultureC. jejunibiofilms could persist under lower flow rates (0.75 ml/min) but were unable to persist at higher flow rates (1 to 2.5 ml/min). In sharp contrast, mixed-culture biofilms were more robust and were unaffected by higher flow rates (2.5 ml/min). Our results indicate that biofilms provide an environmental refuge that is conducive to the survival ofC. jejuni.

Evaluation of an Enrichment-Plating Procedure for the Recovery of Campylobacter jejuni from Turkey Eggs and Meat

1982 ◽  
Vol 45 (14) ◽  
pp. 1276-1278 ◽  
Author(s):  
G. R. ACUFF ◽  
C. VANDERZANT ◽  
F. A. GARDNER ◽  
F. A. GOLAN
Keyword(s):  
Campylobacter Jejuni ◽  
Ferrous Sulfate ◽  
Antimicrobial Agents ◽  
Sodium Metabisulfite ◽  
Sodium Pyruvate ◽  
Enrichment Broth ◽  
Initial Cell ◽  
Selective Enrichment ◽  
Cell Numbers ◽  
Brucella Broth

A selective enrichment-plating procedure was tested for the recovery and enumeration of Campylobacter jejuni from turkey eggs and meat. Enrichment was in brucella broth with ferrous sulfate, sodium metabisulfite, sodium pyruvate and five antimicrobial agents. Plating was on brucella agar supplemented with equine blood and antimicrobial agents. Incubation of tubes and plates was at 42°C in an atmosphere of 5% O2:10% CO2:85% N2. C. jejuni could be recovered from the enrichment broth when calculated initial cell numbers per ml of broth were as low as 0.3 to 3.3

scholarly journals Class 1 Integron-Associated Tobramycin-Gentamicin Resistance in Campylobacter jejuni Isolated from the Broiler Chicken House Environment

2002 ◽  
Vol 46 (11) ◽  
pp. 3660-3664 ◽  
Author(s):  
Margie D. Lee ◽  
Susan Sanchez ◽  
Martha Zimmer ◽  
Umelaalim Idris ◽  
Mark E. Berrang ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Campylobacter Jejuni ◽  
Broiler Chicken ◽  
Aminoglycoside Resistance ◽  
Class 1 Integron ◽  
Integrase Gene ◽  
Conserved Sequence ◽  
Chicken House ◽  
Class 1 ◽  
Gentamicin Resistance

ABSTRACT Using PCR, we screened 105 isolates of poultry-associated Campylobacter jejuni for the presence of class 1 integrons. Of those isolates, 21% (22 of 105) possessed the integrase gene, but only 5 isolates produced an amplicon in a 5′-3′ conserved sequence PCR directed toward amplification of the resistance cassettes. DNA sequencing demonstrated that all five isolates possessed the aminoglycoside resistance gene, aacA4.

Larvicidal toxins fromBacillusthuringiensissubspp.kurstaki,morrisoni(straintenebrionis), andisraelensishave no microbicidal or microbiostatic activity against selected bacteria, fungi, and algae in vitro

2002 ◽  
Vol 48 (3) ◽  
pp. 262-267 ◽  
Author(s):  
J Koskella ◽  
G Stotzky
Keyword(s):  
Bacillus Thuringiensis ◽  
Mixed Culture ◽  
Gram Positive ◽  
Gram Negative ◽  
Crystal Proteins ◽  
Growth Of A Variety ◽  
Insecticidal Toxins ◽  
Antibiotic Effect ◽  
Insecticidal Crystal Proteins

The insecticidal toxins from Bacillus thuringiensis subspp. kurstaki (antilepidopteran), morrisoni strain tenebrionis (anticoleopteran), and israelensis (antidipteran) did not affect the growth of a variety of bacteria (8 gram-negative, 5 gram-positive, and a cyanobacterium), fungi (2 Zygomycetes, 1 Ascomycete, 2 Deuteromycetes, and 2 yeasts), and algae (primarily green and diatoms) in pure and mixed culture, as determined by dilution, disk-diffusion, and sporulation assays with purified free and clay-bound toxins. The insecticidal crystal proteins from B. thuringiensis subspp. kurstaki and israelensis had no antibiotic effect on various gram-positive bacteria.Key words: insecticidal toxins, Bacillus thuringiensis, microbiostatic, microbicidal.

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