Detection of<i>Clostridium perfringens</i>in yearling lamb meat (barbacoa), head, and gut tacos from public markets in Mexico City

Natividad-Bonifacio, Iván; Vázquez-Quiñones, Carlos R.; Rodas-Suárez, Oscar R.; Fernandez, F; Rodríguez-Solis, Esteban; Quiñones-Ramírez, Elsa Irma; Vázquez-Salinas, Carlos

doi:10.1080/09603120903511101

Cited by 5 publications

(1 citation statement)

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“…The present article reports the main results concerning the elaboration and characterization of films of gellan gum mixed with citrus pectin, enriched with EDTA and antimicrobial concentrated supernatant (ACS) from fermentation culture broths of the lactic acid bacterium (LAB), Streptococcus infantarius, containing bacteriocin-like inhibitory substances (BLIS). The antimicrobial activity of the films was tested against Listeria monocytogenes, Escherichia coli and Staphylococcus aureus, growing in a medium based on Mexican "Barbacoa", a highly appreciated meat product, that is usually prepared with lamb meat wrapped in agave leaves and cooked overnight in customized ovens (Natividad-Bonifacio et al, 2010). Also, some selected physical-mechanical properties of the films were determined (i.e.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial pectin-gellan films: effects on three foodborne pathogens in a meat medium, and selected physical-mechanical properties

Trejo-González

Rodríguez-Hernández

López-Cuellar

et al. 2018

CyTA - Journal of Food

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It is first reported the elaboration and characterization of films (F2) containing 1% (w/v) citrus pectin, 0.2% (w/v) gellan gum, 0.5% (w/v) glycerol, CaCl 2 5 mM, ethylenediaminetetraacetic acid (EDTA) 0.05 M and 90 (Arbitrary Units)/mL of an antimicrobial concentrated supernatant (ACS) from fermentation culture broths of the lactic acid bacterium, Streptococcus infantarius. The functional films inhibited the growth of Listeria monocytogenes, Escherichia coli and Staphylococcus aureus in "Barbacoa" medium in 7day cultures at 35°C. "Barbacoa" is a highly appreciated Mexican meat product. In contrast, the control cultures exhibited bacterial-growths up to 10 7-10 9 (Colony-Forming Units)/g. An antimicrobial-activity synergy between ACS and EDTA was demonstrated. Some film-physical properties were modified by the EDTA-ACS incorporation [F2/control-film]: Young's modulus (MPa), 1,394/707; elongation at break (%), 1.9/9.3; stress at break (MPa), 5.7/12.6; water vapor permeability (10-11 g m Pa −1 s −1 m −2), 3/20 and oxygen permeability (10-12 g m Pa −1 s −1 m −2), 1.9/1.2. Películas antimicrobianas de pectina-gelana: efectos sobre tres patógenos transportados por alimentos, en un medio cárnico, y propiedades físicomecánicas seleccionadas RESUMEN Se reporta por primera vez la elaboración y caracterizaron de películas (F2) conteniendo 1% (p/v) pectina cítrica, 0.2% (p/v) goma gelana, 0.5% (p/v) glicerol, CaCl 2 5 mM, ácido etilendiaminotetraacético (EDTA) 0.05 M, y 90 (Unidades Arbitrarias)/mL de sobrenadante concentrado de caldos de fermentación de la bacteria ácido láctica, Streptococcus infantarius, con actividad antimicrobiana (ACS). Las películas inhibieron el crecimiento de Listeria monocytogenes, Escherichia coli y Staphylococcus aureus en cultivos de 7 días a 35°C en medio "Barbacoa". La Barbacoa es un producto cárnico Mexicano altamente apreciado. En contraste, los cultivos control sin película exhibieron crecimientos bacterianos hasta 10 7-10 9 (Unidades Formadoras de Colonias)/g. Se demostró un efecto antimicrobiano sinérgico entre ACS y EDTA. Algunas propiedades físico-mecánicas de las películas fueron afectadas por la inclusión de EDTA-ACS, como [F2/película control]: Módulo de Young (MPa), 1,394/707; Elongación a la ruptura (%), 1.9/9.3; Esfuerzo a la ruptura (MPa), 5.7/12.6; Permeabilidad al Vapor de Agua (10 −11 g m Pa −1 s −1 m −2), 3/ 20, y Permeabilidad al Oxígeno (10 −12 g m Pa −1 s −1 m −2), 1.9/1.2.

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Section: Introductionmentioning

confidence: 99%

Antimicrobial pectin-gellan films: effects on three foodborne pathogens in a meat medium, and selected physical-mechanical properties

Trejo-González

Rodríguez-Hernández

López-Cuellar

et al. 2018

CyTA - Journal of Food

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Spatial and temporal analysis of ground level ozone and nitrogen dioxide concentration across the twin cities of Pakistan

Ahmad

Aziz

2012

Environ Monit Assess

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The analyses presented in this paper include the concentration levels of NO2 and O3 measured during 2 successive years in twin cities (Rawalpindi and Islamabad) of Pakistan from November 2009 to March 2011. NO2 was determined using the passive sampling method, while ozone was determined by Model 400E ozone analyzer. The average NO2 and O3 concentration in twin cities of Pakistan was found to be 44 ± 6 and 18.2 ± 1.24 ppb, respectively. Results indicate that the concentration of NO2 and O3 show seasonal variations. Results also depict that NO2 and O3 concentration levels are high in areas of intense traffic flow and congestion. Rawalpindi has more elevated levels of NO2 and O3 as compared to the Islamabad due to the narrow roads, enclosing architecture of road network and congestion. Climatic variables also influenced the NO2 and O3 concentration, i.e., temperature is positively related with O3, while negatively related with NO2, relative humidity is directly related with NO2 and inversely related with O3, whereas rainfall show negative association with both NO2 and O3 concentration. Comparing the results with WHO standards reveals that NO2 concentration levels at all the sampling points are above the permissible limit, while ozone concentration is still lower than the WHO standards. Thus, there is a need to take appropriate steps to control these continuously increasing levels of NO2 and O3 before they become a serious hazard for the environment and people living in those areas.

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Prevalence of Clostridium perfringens and Detection of Its Toxins in Meat Products in Selected Areas of West Kazakhstan

et al. 2022

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Objectives. The current study aimed to investigate the prevalence of Clostridium perfringens in meat products at meat fairs in four cities of West Kazakhstan from April to October 2021. Methods. In total, 240 samples were collected and subsequently examined for the presence of Clostridium perfringens and its associated toxins using a standard culture method and multiplex PCR assay. Results. In the 240 samples, 67 (30%) tested positive for Clostridium perfringens. All isolates were classified as biotype A with the ability to produce α toxin. The prevalence of Clostridium perfringens was found in almost all types of meat products tested. Beef samples 20/40 (50%) were found the most contaminated with a pathogen, followed by minced lamb 16/40 (40%), ground beef 11/40 (27.5%), lamb 9/40 (22.5%), beef intestines 7/40 (17.5%) and lamb intestines 4/40 (10%). Conclusions. The outcomes of our study demonstrated the high contamination rate of Clostridium perfringens in local meat products. This study is also the first survey on Clostridium perfringens prevalence in meats in Kazakhstan. The findings in this report will enhance knowledge of epidemiology and help develop coordinated actions to prevent and control possible food poisoning outbreaks.

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Detection ofClostridium perfringensin yearling lamb meat (barbacoa), head, and gut tacos from public markets in Mexico City

Cited by 5 publications

References 6 publications

Antimicrobial pectin-gellan films: effects on three foodborne pathogens in a meat medium, and selected physical-mechanical properties

Antimicrobial pectin-gellan films: effects on three foodborne pathogens in a meat medium, and selected physical-mechanical properties

Spatial and temporal analysis of ground level ozone and nitrogen dioxide concentration across the twin cities of Pakistan

Prevalence of Clostridium perfringens and Detection of Its Toxins in Meat Products in Selected Areas of West Kazakhstan

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