Rapid detection and control of psychrotrophic microorganisms in cold storage foods: A review

Wei, Qingyi; Wang, Xiaomei; Sun, Da‐Wen; Pu, Hongbin

doi:10.1016/j.tifs.2019.02.009

Cited by 49 publications

(28 citation statements)

References 140 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar agreements also referred by Li et al (2016), Gschwendtner et al (2016) and Pinto et al (2014). Wei et al (2019) cited psychrotrophic microorganisms in one month frozen stored milk reproduce rapidly and produce high thermal stable proteases and lipases that completely spoilage milk and intake of this milk causes several foodborne-diseases. In this stage psychrotrophic microorganisms number is around 1.20 × 10 7 cfu/mL.…”

Section: Enumeration Of Psychrotrophic Bacteriasupporting

confidence: 70%

Prevalence of Psychrotrophic Bacteria During Frozen Storage of Raw Milk

Ahmed

Sumon

Hossain

et al. 2021

Ann. Bangladesh Agric.

View full text Add to dashboard Cite

The study was aimed to enumerate the load of psychrotrophic bacteria in raw milk stored in freezer. Raw milk was collected from 18 different sized dairy farms located in Gazipur and Mymensingh district. From each location equal number (three of each) of small, medium or large farms were randomly selected. The raw milk samples were stored in freezer (-18 to -22 oC) for 28 days and analyzed for psychrotrophic bacterial load at every 7 days interval. For total viable count, bacteria was grown onto plate count agar at 70C for 10 days. Bacteria grown under such conditions referred as psychrotrophs. However, to determine the type of psychrotrophs selected colonies were grown further onto pseudomonas agar base and gram staining, oxidase, catalase and methyl red test for each isolate were perfomed. The psychrotrophic bacterial load in all the samples were low until 14 days of storage. However, from the third week of storage the bacterial load was observed to increase which reached to as high as 1.1 ± 2.3×107 cfu/mL at the end of the storage period (28 days). The milk samples obtained from large farms were lower (1.3×105 to 6.6×106) than that of medium (1.7×105 to 8.8×106) and small (2.0×105 to 1.1×107) type farms. The bacterial load was significantly (P<0.01) varied among the samples suggesting the heterogeneous management practices in dairy farms. All the morphological and biochemical tests confirmed the isolates as pseudomonas. Based on the present findings, it could be suggested that raw milk can store in the freezer maximum for two weeks in terms of psychrotrophic bacterial load. Ann. Bangladesh Agric. (2020) 24(1) : 65-76

show abstract

Section: Enumeration Of Psychrotrophic Bacteriasupporting

confidence: 70%

Prevalence of Psychrotrophic Bacteria During Frozen Storage of Raw Milk

Ahmed

Sumon

Hossain

et al. 2021

Ann. Bangladesh Agric.

View full text Add to dashboard Cite

show abstract

“…agreement between repeated measurements. Statistical data on precision should be provided by assay vendors, especially in the case of novel technologies, as these are often associated with low precision ( Wei, Wang, Sun, & Pu, 2019 ).…”

Section: Dairy Industry Need For Rapid Methods Organisms Of Interestmentioning

confidence: 99%

“…This technology is based on measuring changes in a solution's impedance which reflect the growth and metabolism of the organism of interest ( Ziyaina et al, 2020 ). Electrochemical methods are cost-effective but they have low sensitivity and limited selectivity compared to optical methods ( Wei et al, 2019 ). Two approaches can be used in the impedance-based detection of microorganisms: the use of selective medium with impedance measurement; the combination of impedance with biological recognition technology.…”

Section: Dairy Industry Need For Rapid Methods Organisms Of Interestmentioning

confidence: 99%

“…Points along the production process of relevance to testing would be raw milk undergoing refrigerated storage, post-pasteurization refrigerated product, and the plant and equipment where biofilms of psychrotrophs would be likely to grow. A single rapid assay which would enumerate and differentiate between the major psychrotrophs encountered in dairy settings would be useful for the purposes of contamination control and monitoring, as would a single convenient, rapid assay for the heat-stable enzymes produced by these bacteria ( Wei et al, 2019 ).…”

Section: Dairy Industry Need For Rapid Methods Organisms Of Interestmentioning

confidence: 99%

See 1 more Smart Citation

Gaps in the assortment of rapid assays for microorganisms of interest to the dairy industry

O’Grady

Cronin

Tierney

et al. 2020

Advances in Applied Microbiology

View full text Add to dashboard Cite

This review presents the results of a study into the offering of rapid microbial detection assays to the Irish dairy industry. At the outset, a consultation process was undertaken whereby key stakeholders were asked to compile a list of the key microorganisms of interest to the sector. The resultant list comprises 19 organisms/groups of organisms divided into five categories: single pathogenic species ( Cronobacter sakazakii , Escherichia coli and Listeria monocytogenes ); genera containing pathogenic species ( Bacillus , Clostridium , Listeria , Salmonella ; Staphylococcus ); broad taxonomic groupings (Coliforms, Enterobacteriaceae, fecal Streptococci, sulfite reducing bacteria/sulfite reducing Clostridia [SRBs/SRCs], yeasts and molds); organisms displaying certain growth preferences or resistance as regards temperature (endospores, psychrotrophs, thermodurics, thermophiles); indicators of quality (total plate count, Pseudomonas spp.). A survey of the rapid assays commercially available for the 19 organisms/groups of organisms was conducted. A wide disparity between the number of rapid tests available was found. Four categories were used to summarize the availability of rapid assays per organism/group of organisms: high coverage (> 15 assays available); medium coverage (5–15 assays available); low coverage (< 5 assays available); no coverage (0 assays available). Generally, species or genera containing pathogens, whose presence is regulated-for, tend to have a good selection of commercially available rapid assays for their detection, whereas groups composed of heterogenous or even undefined genera of mainly spoilage organisms tend to be “low coverage” or “no coverage.” Organisms/groups of organisms with “low coverage” by rapid assays include: Clostridium spp.; fecal Streptococci; and Pseudomonas spp. Those with “no coverage” by rapid assays include: endospores; psychrotrophs; SRB/SRCs; thermodurics; and thermophiles. An important question is: why have manufacturers of rapid microbiological assays failed to respond to the necessity for rapid methods for these organisms/groups of organisms? The review offers explanations, ranging from the technical difficulty involved in detecting as broad a group as the thermodurics, which covers the spores of multiple sporeforming genera as well at least six genera of mesophilic nonsporeformers, to the taxonomically controversial issue as to what constitutes a fecal Streptococcus or SRBs/SRCs. We review two problematic areas for assay developers: validation/certification and the nature of dairy food matrices. Development and implementation of rapid alternative test methods for the dairy industry is influenced by regulations relating to both the microbiological quality standards and the criteria alterna...

show abstract

“…Entre os microrganismos responsáveis por muitas das alterações estão aqueles que se desenvolvem em baixas temperaturas, como os psicrotróficos (WEI et al, 2019). O grupo de microrganismos psicrotróficos possui relação direta com a manipulação e armazenamento inadequado, sendo encontrados com certa frequência em peixes deteriorados (ALCANTARA; MORAIS; SOUZA, 2012).…”

Section: Deterioração Do Pescadounclassified

Elaboração De Sorvete a Base De Leite De Cabra, Adoçado Com Açúcar E/Ou Mel De Abelhas

Pinto¹,

Oliveira²,

Pessoa³

et al. 2021

Fundamentos E Atualidades Em Tecnologia E Inspeção De Alimentos, Volume 2

View full text Add to dashboard Cite

Esta obra está licenciada com uma Licença Creative Commons Atribuição 4.0 Internacional (CC BY 4.0).O conteúdo desta obra e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva do autor. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos ao autor, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais.

show abstract

Rapid detection and control of psychrotrophic microorganisms in cold storage foods: A review

Cited by 49 publications

References 140 publications

Prevalence of Psychrotrophic Bacteria During Frozen Storage of Raw Milk

Prevalence of Psychrotrophic Bacteria During Frozen Storage of Raw Milk

Gaps in the assortment of rapid assays for microorganisms of interest to the dairy industry

Elaboração De Sorvete a Base De Leite De Cabra, Adoçado Com Açúcar E/Ou Mel De Abelhas

Contact Info

Product

Resources

About