Food Protection Trends - January/February 2020 - 8

PEER-REVIEWED ARTICLE

Alexandra Calle,1* Brayan D. Montoya,2
Andrea English1 and Mindy Brashears1

Food Protection Trends, Vol 40, No. 1, p. 8-15
Copyright© 2020, International Association for Food Protection
6200 Aurora Ave., Suite 200W, Des Moines, IA 50322-2864

International Center for Food Industry Excellence, Dept. of
Animal and Food Sciences, Texas Tech University, Box 42141,
Lubbock, TX 79409, USA
2
Universidad Nacional Autónoma de Honduras, Tegucigalpa,
Francisco Morazán, Honduras
1

Microbial Contamination of Grocery Shopping
Trolleys and Baskets in West Texas
ABSTRACT
The objective of this study was to identify food safety
risk factors associated with supermarket trolleys
(grills and handles) and handheld baskets. Indicator
microorganisms evaluated were those detected by
aerobic plate count (APC), yeast and molds (YM),
Enterobacteriaceae (EB), environmental Listeria (EL),
coliforms (CF), and E. coli (EC). In addition, Listeria
monocytogenes, Staphylococcus aureus, Escherichia coli
O157 and Salmonella sp. were tested for. Trolley grills
(n = 36) had EB counts of 2.4 × 102 CFU/cm2. Trolley
handles (n = 36) had 2.7 × 106 of CF and 5.2 CFU/
cm2 of YM. The bottom of handheld baskets (n = 25)
had 3.5 × 105 CFU/cm2 of CF and 5.07 CFU/cm2 of
EC. S. aureus was found on 96% of the baskets, 50%
of the trolley handles (18 out of 36 samples), and 42%
of the trolleys' grills. E. coli O157 was identified on 17%
of baskets, 3% on trolley grills, and 3% on handles.
Salmonella sp. was detected on 16% of baskets and
8% of trolley grills. L. monocytogenes was detected on

17% of the bottoms of handheld baskets but on none of
the other samples. These results suggest the need for
implementation of sanitation programs to regularly clean
trolleys and baskets, as well as for consumer education.

INTRODUCTION
Grocery trolleys and handheld baskets are frequently
exposed to a variety of food products known to have an
increased risk of pathogen presence, including raw eggs
and meat as well as produce. Therefore, environmental
contamination with foodborne pathogens in supermarket
settings is likely.
Researchers have found the following microorganisms
on produce: Listeria sp., L. monocytogenes, E. coli O157,
Salmonella, Penicillium sp., enterotoxigenic Staphylococcus
spp., Bacillus spp., and yeast and molds. In addition, retail
meat and seafood products have been found to harbor the
following potential pathogens: Campylobacter spp., Shiga
toxin-producing E. coli, and Salmonella (1, 11, 13, 23, 26, 28).
If cross-contamination between food products and packaging

*Author for correspondence: Phone: +1 806.834.4074; Email: alexandra.calle@ttu.edu

8

Food Protection Trends January/February



http://www.foodprotection.org/files/food-protection-trends/jan-feb-20-calle.pdf

Food Protection Trends - January/February 2020

Table of Contents for the Digital Edition of Food Protection Trends - January/February 2020

Microbial Contamination of Grocery Shopping Trolleys and Baskets in West Texas
The Influence of Time Use, Risk Factors and Occupation on Meal Preparers’ Use of Food Thermometers
Assessment of Apple Packers’ Training Needs and Attitudes on Food Safety and The Food Safety Modernization Act (FSMA)
Knowledge and Practices of Meat Safety by Meat Sellers in the Tamale Metropolis of Ghana
Beyond the Bio Carl Custer
PDG Highlight Food Hygiene and Sanitation PDG
General Interest Paper Predictive Models for Food Code Violations
Industry Products
Coming Events
Food Protection Trends - January/February 2020 - Cover1
Food Protection Trends - January/February 2020 - Cover2
Food Protection Trends - January/February 2020 - 1
Food Protection Trends - January/February 2020 - 2
Food Protection Trends - January/February 2020 - 3
Food Protection Trends - January/February 2020 - 4
Food Protection Trends - January/February 2020 - 5
Food Protection Trends - January/February 2020 - 6
Food Protection Trends - January/February 2020 - 7
Food Protection Trends - January/February 2020 - Microbial Contamination of Grocery Shopping Trolleys and Baskets in West Texas
Food Protection Trends - January/February 2020 - 9
Food Protection Trends - January/February 2020 - 10
Food Protection Trends - January/February 2020 - 11
Food Protection Trends - January/February 2020 - 12
Food Protection Trends - January/February 2020 - 13
Food Protection Trends - January/February 2020 - 14
Food Protection Trends - January/February 2020 - 15
Food Protection Trends - January/February 2020 - The Influence of Time Use, Risk Factors and Occupation on Meal Preparers’ Use of Food Thermometers
Food Protection Trends - January/February 2020 - 17
Food Protection Trends - January/February 2020 - 18
Food Protection Trends - January/February 2020 - 19
Food Protection Trends - January/February 2020 - 20
Food Protection Trends - January/February 2020 - 21
Food Protection Trends - January/February 2020 - 22
Food Protection Trends - January/February 2020 - 23
Food Protection Trends - January/February 2020 - 24
Food Protection Trends - January/February 2020 - 25
Food Protection Trends - January/February 2020 - 26
Food Protection Trends - January/February 2020 - 27
Food Protection Trends - January/February 2020 - 28
Food Protection Trends - January/February 2020 - Assessment of Apple Packers’ Training Needs and Attitudes on Food Safety and The Food Safety Modernization Act (FSMA)
Food Protection Trends - January/February 2020 - 30
Food Protection Trends - January/February 2020 - 31
Food Protection Trends - January/February 2020 - 32
Food Protection Trends - January/February 2020 - 33
Food Protection Trends - January/February 2020 - 34
Food Protection Trends - January/February 2020 - 35
Food Protection Trends - January/February 2020 - 36
Food Protection Trends - January/February 2020 - 37
Food Protection Trends - January/February 2020 - 38
Food Protection Trends - January/February 2020 - 39
Food Protection Trends - January/February 2020 - Knowledge and Practices of Meat Safety by Meat Sellers in the Tamale Metropolis of Ghana
Food Protection Trends - January/February 2020 - 41
Food Protection Trends - January/February 2020 - 42
Food Protection Trends - January/February 2020 - 43
Food Protection Trends - January/February 2020 - 44
Food Protection Trends - January/February 2020 - 45
Food Protection Trends - January/February 2020 - 46
Food Protection Trends - January/February 2020 - 47
Food Protection Trends - January/February 2020 - 48
Food Protection Trends - January/February 2020 - 49
Food Protection Trends - January/February 2020 - 50
Food Protection Trends - January/February 2020 - 51
Food Protection Trends - January/February 2020 - Beyond the Bio Carl Custer
Food Protection Trends - January/February 2020 - 53
Food Protection Trends - January/February 2020 - 54
Food Protection Trends - January/February 2020 - PDG Highlight Food Hygiene and Sanitation PDG
Food Protection Trends - January/February 2020 - General Interest Paper Predictive Models for Food Code Violations
Food Protection Trends - January/February 2020 - 57
Food Protection Trends - January/February 2020 - 58
Food Protection Trends - January/February 2020 - 59
Food Protection Trends - January/February 2020 - 60
Food Protection Trends - January/February 2020 - 61
Food Protection Trends - January/February 2020 - 62
Food Protection Trends - January/February 2020 - 63
Food Protection Trends - January/February 2020 - 64
Food Protection Trends - January/February 2020 - 65
Food Protection Trends - January/February 2020 - Industry Products
Food Protection Trends - January/February 2020 - 67
Food Protection Trends - January/February 2020 - 68
Food Protection Trends - January/February 2020 - 69
Food Protection Trends - January/February 2020 - 70
Food Protection Trends - January/February 2020 - 71
Food Protection Trends - January/February 2020 - Coming Events
Food Protection Trends - January/February 2020 - Cover3
Food Protection Trends - January/February 2020 - Cover4
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