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1.
Front Microbiol ; 13: 928509, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35814688

RESUMO

In 2019, the United States National Antimicrobial Resistance Monitoring System (NARMS) surveyed raw salmon, shrimp, and tilapia from retail grocery outlets in eight states to assess the prevalence of bacterial contamination and antimicrobial resistance (AMR) in the isolates. Prevalence of the targeted bacterial genera ranged among the commodities: Salmonella (0%-0.4%), Aeromonas (19%-26%), Vibrio (7%-43%), Pseudomonas aeruginosa (0.8%-2.3%), Staphylococcus (23%-30%), and Enterococcus (39%-66%). Shrimp had the highest odds (OR: 2.8, CI: 2.0-3.9) of being contaminated with at least one species of these bacteria, as were seafood sourced from Asia vs. North America (OR: 2.7; CI: 1.8-4.7) and Latin America and the Caribbean vs. North America (OR: 1.6; CI: 1.1-2.3) and seafood sold at the counter vs. sold frozen (OR: 2.1; CI: 1.6-2.9). Isolates exhibited pan-susceptibility (Salmonella and P. aeruginosa) or low prevalence of resistance (<10%) to most antimicrobials tested, with few exceptions. Seafood marketed as farm-raised had lower odds of contamination with antimicrobial resistant bacteria compared to wild-caught seafood (OR: 0.4, CI: 0.2-0.7). Antimicrobial resistance genes (ARGs) were detected for various classes of medically important antimicrobials. Clinically relevant ARGs included carbapenemases (bla IMI-2, bla NDM-1) and extended spectrum ß-lactamases (ESBLs; bla CTX-M-55). This population-scale study of AMR in seafood sold in the United States provided the basis for NARMS seafood monitoring, which began in 2020.

2.
J Glob Antimicrob Resist ; 26: 84-90, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34048979

RESUMO

OBJECTIVES: Most patients with Campylobacter infection do not require antibiotics; however, they are indicated in severe cases. Clinical breakpoints for many antibiotics are not yet established by the CLSI, making antibiotic selection for resistant infections challenging. During an outbreak of pet store puppy-associated XDR Campylobacter jejuni infections resistant to seven antibiotic classes, several patients required antibiotics. This study aimed to determine MICs of the outbreak strain for various antibiotics and describes the successful treatment of two patients using imipenem/cilastatin, a drug not traditionally used for Campylobacter infections. METHODS: We used whole-genome multilocus sequence typing (wgMLST) to determine the genetic relatedness of Campylobacter isolates collected from two human patients' stool samples with the outbreak strain. We performed extended antimicrobial susceptibility testing on 14 outbreak isolates and 6 control strains to determine MICs for 30 antibiotics (14 classes). RESULTS: Isolates from both patients were highly related to the outbreak strain by wgMLST. MICs indicated resistance of the outbreak strain to most antibiotic classes, except phenicols, glycylcyclines and carbapenems. Due to potential side effects of phenicols and safety issues precluding use of glycylcyclines such as tigecycline when alternatives agents are available, we used carbapenems to treat patients who were severely ill from the outbreak strain infections. CONCLUSION: Stewardship and clinical vigilance are warranted when deciding whether and how to treat patients with suspected C. jejuni diarrhoea with antibiotics. Clinicians should maintain a high index of suspicion for XDR Campylobacter when patients fail to improve and consider the use of carbapenems in such settings.


Assuntos
Infecções por Campylobacter , Campylobacter jejuni , Preparações Farmacêuticas , Animais , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Infecções por Campylobacter/tratamento farmacológico , Infecções por Campylobacter/epidemiologia , Campylobacter jejuni/genética , Surtos de Doenças , Cães , Humanos
3.
J Food Prot ; 84(10): 1749-1759, 2021 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-34015113

RESUMO

ABSTRACT: Little is known about the prevalence of antimicrobial-resistant (AMR) bacteria in veal meat in the United States. We estimated the prevalence of bacterial contamination and AMR in various veal meats collected during the 2018 U.S. National Antimicrobial Resistance Monitoring System (NARMS) survey of retail outlets in nine states and compared the prevalence with the frequency of AMR bacteria from other cattle sources sampled for NARMS. In addition, we identified genes associated with resistance to medically important antimicrobials and gleaned other genetic details about the resistant organisms. The prevalence of Campylobacter, Salmonella, Escherichia coli, and Enterococcus in veal meats collected from grocery stores in nine states was 0% (0 of 358), 0.6% (2 of 358), 21.1% (49 of 232), and 53.5% (121 of 226), respectively, with ground veal posing the highest risk for contamination. Both Salmonella isolates were resistant to at least one antimicrobial agent as were 65.3% (32 of 49) of E. coli and 73.6% (89 of 121) of Enterococcus isolates. Individual drug and multiple drug resistance levels were significantly higher (P < 0.05) in E. coli and Enterococcus from retail veal than in dairy cattle ceca and retail ground beef samples from 2018 NARMS data. Whole genome sequencing was conducted on select E. coli and Salmonella from veal. Cephalosporin resistance (blaCMY and blaCTX-M), macrolide resistance (mph), and plasmid-mediated quinolone resistance (qnr) genes and gyrA mutations were found. We also identified heavy metal resistance genes ter, ars, mer, fieF, and gol and disinfectant resistance genes qac and emrE. An stx1a-containing E. coli was also found. Sequence types were highly varied among the nine E. coli isolates that were sequenced. Several plasmid types were identified in E. coli and Salmonella, with the majority (9 of 11) of isolates containing IncF. This study illustrates that veal meat is a carrier of AMR bacteria.


Assuntos
Proteínas de Escherichia coli , Carne Vermelha , Animais , Antibacterianos/farmacologia , Antiporters , Bovinos , Farmacorresistência Bacteriana , Escherichia coli , Contaminação de Alimentos/análise , Macrolídeos , Carne , Testes de Sensibilidade Microbiana , Estados Unidos
4.
Microorganisms ; 8(7)2020 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-32679763

RESUMO

The role animal food plays in the introduction of antimicrobial-resistant bacteria into the human food chain is not well understood. We conducted an analysis of 1025 samples (647 pet food and 378 animal feed) collected across the United States during 2005-2011 for two indicator organisms (Escherichia coli and Enterococcus spp.). The overall prevalence ranged from 12.5% for E. coli to 45.2% for Enterococcus spp., and 11.2% of samples harbored both organisms. Regardless of bacterial genus, animal feed had significantly higher prevalence than pet food (p < 0.001). A general downward trend in prevalence was observed from 2005 to 2009 followed by an upward trend thereafter. Among E. coli isolates (n = 241), resistance was highest to tetracycline (11.2%) and below 5% for fourteen other antimicrobials. Among Enterococcus spp. isolates (n = 1074), Enterococcus faecium (95.1%) was the predominant species. Resistance was most common to tetracycline (30.1%) and ciprofloxacin (10.7%), but below 10% for thirteen other antimicrobials. Multidrug-resistant organisms were observed among both E. coli and Enterococcus spp. isolates at 3.3%. Compared to National Antimicrobial Resistance Monitoring System (NARMS) 2011 retail meat and animal data, the overall resistance for both organisms was much lower in animal food. These findings help establish a historic baseline for the prevalence and antimicrobial resistance among U.S. animal food products and future efforts may be needed to monitor changes over time.

6.
Front Microbiol ; 10: 2826, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31866986

RESUMO

Fluoroquinolones are used to treat serious bacterial infections, including those caused by Escherichia coli and Salmonella enterica. The emergence of plasmid-mediated quinolone resistance (PMQR) represent a new challenge to the successful treatment of Gram-negative infections. As part of a long-term strategy to generate a reference database of closed plasmids from antimicrobial resistant foodborne bacteria, we performed long-read sequencing of 11 E. coli isolates from retail meats that were non-susceptible to ciprofloxacin. Each of the isolates had PMQR genes, including qnrA1, qnrS1, and qnrB19. The four qnrB19 genes were carried on two distinct ColE-type plasmids among isolates from pork chop and ground turkey and were identical to plasmids previously identified in Salmonella. Seven other plasmids differed from any other sequences in GenBank and comprised IncF and IncR plasmids that ranged in size from 48 to 180 kb. These plasmids also contained different combinations of resistance genes, including those conferring resistance to beta-lactams, macrolides, sulfonamides, tetracycline, and heavy metals. Although relatively few isolates have PMQR genes, the identification of diverse plasmids in multiple retail meat sources suggests the potential for further spread of fluoroquinolone resistance, including through co-selection. These results highlight the value of long-read sequencing in characterizing antimicrobial resistance genes of public health concern.

7.
Public Health Nutr ; 22(15): 2835-2843, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31203828

RESUMO

OBJECTIVE: To examine the association between parenting styles and overall child dietary quality within households that are low-income and food-insecure. DESIGN: Child dietary intake was measured via a 24 h dietary recall. Dietary quality was assessed using the Healthy Eating Index-2005 (HEI-2005). Parenting styles were measured and scored using the Parenting Styles and Dimensions Questionnaire. Linear regressions were used to test main and interaction associations between HEI-2005 scores and parenting styles. SETTING: Non-probability sample of low-income and food-insecure households in South Carolina, USA. PARTICIPANTS: Parent-child dyads (n 171). Parents were ≥18 years old and children were 9-15 years old. RESULTS: We found a significant interaction between authoritative and authoritarian parenting style scores. For those with a mean authoritarian score, each unit increase in authoritative score was associated with a higher HEI-2005 score (b = 3·36, P < 0.05). For those with an authoritarian score that was 1 sd above the mean authoritarian score, each unit increase in authoritative score was associated with a higher HEI-2005 score (b = 8.42, P < 0.01). For those with an authoritarian score that was -1 sd below the mean authoritarian score, each unit increase in authoritative score was associated with a lower HEI-2005 score; however, this was not significant (b = -1·69, P > 0·05). Permissive parenting style scores were negatively associated with child dietary quality (b = -2·79, P < 0·05). CONCLUSIONS: Parenting styles should be considered an important variable that is associated with overall dietary quality in children living within low-income and food-insecure households.


Assuntos
Registros de Dieta , Dieta Saudável/estatística & dados numéricos , Abastecimento de Alimentos/estatística & dados numéricos , Poder Familiar , Pobreza/estatística & dados numéricos , Adolescente , Adulto , Autoritarismo , Criança , Feminino , Humanos , Masculino , South Carolina , Inquéritos e Questionários
8.
J Food Sci ; 84(6): 1501-1512, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31116418

RESUMO

Susceptibility profiles were determined for 111 Campylobacter coli strains obtained in 1998 to 1999 and 2015 from market age pigs and pork chops against 22 disinfectants and 9 antimicrobials. Resistance to tetracycline (TET) was observed in 44.4% of 1998 to 1999 strains, and the antibiotic resistance profile was TET. But strains obtained in 2015 from swine and retail pork chops had 75% TET resistance and the antibiotic resistance profile was TET, followed by azithromycin-erythromycin-TET-telithromycin-clindamycin. Antimicrobial resistance increased in 2015 strains. All strains were resistant to triclosan, and 84.1% and 95.8% of strains in 1998 to 1999 and 2015, respectively, were chlorhexidine resistant. All strains were susceptible to benzalkonium chloride. There was a shift toward higher susceptibility to chlorhexidine, triclosan, P-128, OdoBan, CPB, and CPC in 2015 swine and pork chop strains compared with 1998 to 1999 strains. The disinfectants Tek-Trol and providone-iodine, tris(hydroxylmethyl)nitromethane (THN) and formaldehyde demonstrated the highest susceptibilities. Didecyldimethylammonium chloride (C10AC) appeared to be about equally effective as benzyldimethyltetradecylammonium chloride (C14BAC) for inhibiting C. coli, and both were more effective than C8AC and C12BAC, but C16BAC was not efficient at inhibiting C. coli. The BACs, C12BAC and C14BAC, were the most effective ingredients in DC&R. Also, C12BAC and C14BAC, or these two in synergy with C10AC were responsible for inhibition of C. coli at high P-128 MICs. No cross-resistance was observed between antibiotics and disinfectants. The continued use of THN and formaldehyde in DC&R should be evaluated since these components are not effective, and their inclusion adds unwanted chemicals in the environment. PRACTICAL APPLICATION: Campylobacter species cause diarrheal disease throughout the world. Disinfectants are often used on the farm, in veterinary medicine, by the food processing industry, in restaurants, and in consumer's homes. Limited information is available in the literature showing how disinfectants or disinfectant components may affect the many different foodborne pathogens, and, specifically, Campylobacter coli studied here. The knowledge generated in this study concerning the interactions of a broad array of disinfectants against C. coli may well affect the types of disinfectants and disinfectant formulations allowable for use by medical personnel, producers, food processors, restaurants, and consumers.


Assuntos
Antibacterianos/farmacologia , Campylobacter coli/efeitos dos fármacos , Desinfetantes/farmacologia , Carne Vermelha/microbiologia , Animais , Compostos de Benzalcônio/farmacologia , Campylobacter coli/genética , Campylobacter coli/isolamento & purificação , Clindamicina/farmacologia , Farmacorresistência Bacteriana , Eritromicina/farmacologia , Contaminação de Alimentos/análise , Testes de Sensibilidade Microbiana , Suínos , Tetraciclina/farmacologia
9.
Public Health Nutr ; 22(14): 2581-2590, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31097047

RESUMO

OBJECTIVE: We explored how positive and negative life experiences of caregivers are associated with household food insecurity. DESIGN: The Midlands Family Study (MFS) was a cross-sectional study with three levels of household food security: food secure, food insecure without child hunger and food insecure with child hunger. Ordinal logistic regression analysis was used for analyses of negative and positive life experiences (number, impact, type) associated with food insecurity. SETTING: An eight-county region in South Carolina, USA, in 2012-2013. PARTICIPANTS: Caregivers (n 511) in households with children. RESULTS: Caregivers who reported greater numbers of negative life experiences and greater perceived impact had increased odds of household food insecurity and reporting their children experienced hunger. Each additional negative life experience count of the caregiver was associated with a 16 % greater odds of food insecurity without child hunger and a 28 % greater odds of child hunger. Each one-unit increase in the negative impact score (e.g. a worsening) was associated with 8 % higher odds of food insecurity without child hunger and 12 % higher odds of child hunger. Negative work experiences or financial instability had the strongest association (OR = 1·8; 95 % CI 1·5, 2·2) with child hunger. Positive life experiences were generally not associated with food security status, with one exception: for each unit increase in the number of positive experiences involving family and other relationships, the odds of child hunger decreased by 22 %. CONCLUSIONS: More research is needed to understand approaches to build resilience against negative life experiences and strengthen positive familial, community and social relationships.


Assuntos
Cuidadores/psicologia , Características da Família , Abastecimento de Alimentos/estatística & dados numéricos , Acontecimentos que Mudam a Vida , Desnutrição/epidemiologia , Adulto , Criança , Pré-Escolar , Estudos Transversais , Feminino , Humanos , Fome , Modelos Logísticos , Masculino , Desnutrição/psicologia , Pessoa de Meia-Idade , Razão de Chances , South Carolina/epidemiologia
10.
Foodborne Pathog Dis ; 15(11): 701-704, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30153043

RESUMO

We tested a diverse set of 500 isolates of nontyphoidal Salmonella enterica subsp. enterica from various animal, food, and human clinical sources for susceptibility to antimicrobials currently lacking epidemiological cutoff values (ECOFFs) set by the European Committee on Antimicrobial Susceptibility Testing. A consortium of five different laboratories each tested 100 isolates, using broth microdilution panels containing twofold dilutions of ceftriaxone, cefepime, and colistin to determine the minimum inhibitory concentrations of each drug when tested against the Salmonella isolates. Based on the resulting data, new ECOFFs of 0.25 µg/mL for ceftriaxone, 0.12 µg/mL for cefepime, and 2 µg/mL for colistin have been proposed. These thresholds will aid in the identification of Salmonella that have phenotypically detectable resistance mechanisms to these important antimicrobials.


Assuntos
Cefepima/farmacologia , Ceftriaxona/farmacologia , Colistina/farmacologia , Farmacorresistência Bacteriana , Testes de Sensibilidade Microbiana/normas , Salmonella enterica/efeitos dos fármacos , Animais , Antibacterianos/farmacologia , Humanos , Salmonella enterica/isolamento & purificação , Estados Unidos
11.
Microb Drug Resist ; 24(7): 939-948, 2018 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-30148698

RESUMO

In recent years, there have been increased reports on the detection of extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli and Salmonella strains from food-producing animals and animal products in the United States. We characterized 18 ESBL E. coli isolates from cattle (n = 5), chicken breast (n = 5), ground turkey (n = 6), ground beef (n = 1), and pork chops (n = 1) that were collected by the National Antimicrobial Resistance Monitoring System (NARMS) between 2011 and 2015. In vitro antimicrobial susceptibility testing was done against a panel of 14 antimicrobials followed by a secondary panel of 9 ß-lactam agents. Whole-genome sequencing was used to characterize the resistome, plasmids, and the genetic structures of the ESBL genes. All ESBL-producing E. coli isolates were resistant to at least three antimicrobial classes and carried various blaCTX-M genes. Most of the cattle and ground turkey isolates carried blaCTX-M-27. In chicken breast isolates, blaCTX-M-1 was present as part of an ISEcp1 transposition unit carried on a plasmid that shares sequence similarity with the backbone structure of the IncI plasmid. Isolates carrying the blaCTX-M-14 and blaCTX-M-15 genes, widely distributed in human clinical isolates, were also isolated. To our knowledge, this is the first report of the widely distributed blaCTX-M-14 and blaCTX-M-15 in E. coli isolates from retail meat samples in the United States. Different insertional sequences were identified upstream of these blaCTX-Ms, including ISEcp1, IS26, and IS903-D. CTX-M in E. coli from food animals and retail chicken breast were often present on plasmids with other resistance genes. Other resistance genes identified included aadA, strA, strB, aac(3)-IId, aac(3)-VIa, aph(3')-Ic, blaTEM, blaHERA-3, floR, sul1, sul2, catA1, tetA, tetB, dfrA, and qacE. These data describe the emergence of CTX-M-carrying E. coli isolates in food animals and animal products monitored by NARMS program.


Assuntos
Proteínas de Escherichia coli/genética , Escherichia coli/crescimento & desenvolvimento , Carne/microbiologia , beta-Lactamases/genética , Animais , Antibacterianos/farmacologia , Bovinos , Farmacorresistência Bacteriana/genética , Escherichia coli/efeitos dos fármacos , Infecções por Escherichia coli/tratamento farmacológico , Infecções por Escherichia coli/microbiologia , Humanos , Plasmídeos/genética , Estados Unidos , Sequenciamento Completo do Genoma/métodos
12.
Arch Microbiol ; 200(5): 819-828, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-29508031

RESUMO

Three independent strains of Neisseria sp. were isolated from the oral cavity of California sea lions (Zalophus californianus) that were admitted to The Marine Mammal Center facilities in California, USA. The strains were isolated from oral swabs by cultivation on Trypticase Soy agar with 5% sheep blood under aerobic conditions. The 16S rRNA gene sequence of these three strains shared 99% similarity, but demonstrated only 97-98% nucleotide similarity to the phylogenetically closest relatives such as N. canis, N. zoodegmatis, N. animaloris, and N. dumasiana. These three strains also shared 99% sequence similarity of their rplF, rpoB, and gyrB gene sequences. Based on the biochemical tests alone (i.e., without genetic analysis of housekeeping genes), it is difficult to discriminate this novel species from N. canis; however, it can be easily discriminated from all phylogenetically closely related species using the sequencing analysis of its housekeeping genes (e.g., rplF, rpoB, or gyrB genes). Thus, genetic testing is indispensable for accurate identification of this species in a routine laboratory practice. The species is an obligate aerobe and able to grow in Mueller-Hinton broth supplemented with 6% NaCl, but the phylogenetically closely related species (N. canis, N. zoodegmatis, N. animaloris, and N. dumasiana) were not. Based on these phenotypic and genotypic characteristics and phylogenetic data, we conclude that these new strains represent a novel species of the genus Neisseria, for which the name Neisseria zalophi sp. nov. is proposed. The type strain is CSL 7565T (= ATCC BAA2455T = DSM 102031T).


Assuntos
Boca/microbiologia , Neisseria/genética , Leões-Marinhos/microbiologia , Animais , Composição de Bases , DNA Bacteriano/genética , Ácidos Graxos/análise , Genótipo , Tipagem Molecular , Neisseria/isolamento & purificação , Fenótipo , Filogenia , RNA Ribossômico 16S/genética , Análise de Sequência de DNA
13.
Ethn Health ; 23(3): 276-292, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-27905205

RESUMO

OBJECTIVES: In 2014, 30% of African-American households with children had low or very low food security, a rate double that of white households with children. A household has low food security if its members experience food shortages and reductions in food quality attributable to a lack of household resources or access and very low food security if its members also experience reductions in food intake and disrupted eating patterns. Households that are either low or very low food secure are known collectively as food insecure. We examined the association between the severity of household food insecurity and reports of lifetime racial discrimination among a sample of food-insecure African-American households in South Carolina. DESIGN: Data were collected from 154 African-American respondents. Food insecurity was measured using the US Department of Agriculture's Household Food Security Survey Module. Lifetime racial discrimination was measured using the Perceived Ethnic Discrimination Questionnaire-Community Version (PEDQ-CV). We used logistic regression to test the association between severity of food insecurity (low vs. very low food secure), PEDQ-CV score and PEDQ-CV subscales. All models were adjusted for demographic and socioeconomic variables. RESULTS: A one-unit increase in the frequency of lifetime racial discrimination was associated with a 5% increase in the odds of being very low food secure (odds ratio (OR) 1.05, P < .05). More reports of discrimination that were stigmatizing or devaluing (OR 1.16, P < .05), took place at a workplace or school (OR 1.15, P < .05) or were threatening or aggressive (OR 1.39, P < .05) increased the odds of being very low food secure. More reports of racial discrimination that were excluding or rejecting did not significantly increase the odds of being very low food secure (OR 1.07, P > .05). CONCLUSIONS: Severity of household food insecurity is associated with lifetime racial discrimination among African-American households in South Carolina.


Assuntos
Negro ou Afro-Americano/estatística & dados numéricos , Abastecimento de Alimentos/estatística & dados numéricos , Racismo/estatística & dados numéricos , Adolescente , Negro ou Afro-Americano/psicologia , Criança , Feminino , Humanos , Modelos Logísticos , Masculino , Razão de Chances , Racismo/psicologia , Instituições Acadêmicas , Estigma Social , Apoio Social , Fatores Socioeconômicos , South Carolina , Local de Trabalho/psicologia
14.
J Food Prot ; 80(11): 1863-1866, 2017 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-28994613

RESUMO

Campylobacter is a leading cause of foodborne diarrheal illness worldwide, and the emergence of antimicrobial-resistant strains is a major global public health concern. The goal of this study was to compare the activity of different fluoroquinolone antibiotics against ciprofloxacin-resistant Campylobacter jejuni and Campylobacter coli. Isolates from retail meats collected between 2002 and 2009 were selected based on their in vitro susceptibility testing results against ciprofloxacin. In total, 289 C. jejuni and 165 C. coli were collected and analyzed. All ciprofloxacin-resistant isolates had a single mutation (Thr86Ile) in their gyrase A (gyrA) gene and exhibited decreased susceptibility to all eight fluoroquinolones tested. Gatifloxacin, enrofloxacin, and levofloxacin showed greater activity than the other fluoroquinolone drugs in both ciprofloxacin-sensitive and -resistant strains.

15.
Sci Rep ; 7(1): 11017, 2017 09 08.
Artigo em Inglês | MEDLINE | ID: mdl-28887450

RESUMO

Distillers grains are co-products of the corn ethanol industry widely used in animal feed. We examined the effects of erythromycin, penicillin, and virginiamycin at low concentrations reflective of those detected in distillers grains on bacterial resistance selection. At 0.1 µg/ml erythromycin, macrolide-resistant mutants were induced in one Campylobacter coli and one Enterococcus faecium strain, while these strains plus three additional C. coli, one additional E. faecium, and one C. jejuni also developed resistance when exposed to 0.25 µg/ml erythromycin. At 0.5 µg/ml erythromycin, a total of eight strains (four Campylobacter and four Enterococcus) obtained macrolide-resistant mutants, including two strains from each genus that were not selected at lower erythromycin concentrations. For penicillin, three of five E. faecium strains but none of five Enterococcus faecalis strains consistently developed resistance at all three selection concentrations. Virginiamycin at two M1:S1 ratios did not induce resistance development in four out of five E. faecium strains; however, increased resistance was observed in the fifth one under 0.25 and 0.5 µg/ml virginiamycin selections. Although not yet tested in vivo, these findings suggest a potential risk of stimulating bacterial resistance development in the animal gut when distillers grains containing certain antibiotic residues are used in animal feed.


Assuntos
Antibacterianos/farmacologia , Campylobacter/efeitos dos fármacos , Farmacorresistência Bacteriana , Enterococcus/efeitos dos fármacos , Eritromicina/farmacologia , Penicilinas/farmacologia , Virginiamicina/farmacologia , Taxa de Mutação , Seleção Genética
16.
J Nutr Educ Behav ; 49(4): 296-303.e1, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-28073623

RESUMO

OBJECTIVE: To examine the strategies and behaviors caregivers use to manage the household food supply when their children experience food insecurity as measured by the US Department of Agriculture's Household Food Security Survey Module. DESIGN: Cross-sectional survey with open-ended questions collected in person. SETTING: Urban and nonurban areas, South Carolina, US. PARTICIPANTS: Caregivers who reported food insecurity among their children (n = 746). PHENOMENON OF INTEREST: Strategies and behaviors used to manage the household food supply. ANALYSIS: Emergent and thematic qualitative coding of open-ended responses. RESULTS: The top 3 strategies and behaviors to change meals were (1) changes in foods purchased or obtained for the household, (2) monetary and shopping strategies, and (3) adaptations in home preparation. The most frequently mentioned foods that were decreased were protein foods (eg, meat, eggs, beans), fruits, and vegetables. The most frequently mentioned foods that were increased were grains and starches (eg, noodles), protein foods (eg, beans, hot dogs), and mixed foods (eg, sandwiches). CONCLUSIONS AND IMPLICATIONS: Caregivers use a wide variety of strategies and behaviors to manage the household food supply when their children are food insecure. Future work should examine how these strategies might affect dietary quality and well-being of food-insecure children.


Assuntos
Fenômenos Fisiológicos da Nutrição do Adolescente , Fenômenos Fisiológicos da Nutrição Infantil , Comportamento do Consumidor , Criatividade , Dieta , Abastecimento de Alimentos , Adolescente , Cuidadores , Criança , Pré-Escolar , Comportamento do Consumidor/economia , Estudos Transversais , Dieta/economia , Dieta/psicologia , Inquéritos sobre Dietas , Características da Família , Abastecimento de Alimentos/economia , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Refeições , Fatores Socioeconômicos , South Carolina , Estados Unidos , United States Department of Agriculture
17.
J Nutr Educ Behav ; 49(3): 187-195.e1, 2017 03.
Artigo em Inglês | MEDLINE | ID: mdl-27876321

RESUMO

OBJECTIVE: To explore how a sample of Mexican American mothers with preschool-aged children recruited from a Midwestern Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) clinic obtained information about 4 behaviors associated with childhood obesity risk: eating, physical activity, screen time, and sleep. DESIGN: One-on-one structured interviews in which participants were asked how they communicated with family, learned to take care of their first infant, and obtained information about the 4 targeted behaviors for their preschool-aged child. SETTING: An urban WIC clinic in the Midwest. PARTICIPANTS: Forty Mexican-descent mothers enrolled in WIC with children aged 3-4 years. PHENOMENON OF INTEREST: Exposure to information about the 4 targeted behaviors among Mexican-descent mothers participating in WIC. ANALYSIS: Quantitative and qualitative data were used to characterize and compare across participants. RESULTS: Participants primarily obtained information from their child's maternal grandmother during their first child's infancy and from health professionals for their preschool-aged child. Participants typically obtained information through interpersonal communication, television, and magazines. Participants were most interested in healthy eating information and least interested in screen time information. Some participants did not seek information. CONCLUSIONS AND IMPLICATIONS: Participants engaged in different patterns of information seeking across their child's development and the 4 behaviors, which suggests that future research should be behaviorally specific. Findings from this study suggest several hypotheses to test in future research.


Assuntos
Comportamento Alimentar , Assistência Alimentar , Americanos Mexicanos/estatística & dados numéricos , Mães/estatística & dados numéricos , Obesidade Infantil , Adulto , Pré-Escolar , Exercício Físico , Feminino , Humanos , Estilo de Vida , Meio-Oeste dos Estados Unidos/epidemiologia , Obesidade Infantil/epidemiologia , Obesidade Infantil/prevenção & controle , Obesidade Infantil/psicologia , Sono , Televisão
18.
Public Health Nutr ; 19(15): 2781-8, 2016 10.
Artigo em Inglês | MEDLINE | ID: mdl-27133939

RESUMO

OBJECTIVE: To examine the association of both perceived and geographic neighbourhood food access with food security status among households with children. DESIGN: This was a cross-sectional study in which participants' perceptions of neighbourhood food access were assessed by a standard survey instrument, and geographic food access was evaluated by distance to the nearest supermarket. Multinomial logistic regression models were used to examine the associations. SUBJECTS: The Midlands Family Study included 544 households with children in eight counties in South Carolina, USA. Food security status among participants was classified into three categories: food secure (FS), food insecure (FI) and very low food security among children (VLFS-C). RESULTS: Compared with FS households, VLFS-C households had lower odds of reporting easy access to adequate food shopping. VLFS-C households also had lower odds of reporting neighbourhood access to affordable fruits and vegetables compared with FS households and reported worse selection of fruits and vegetables, quality of fruits and vegetables, and selection of low-fat products. FI households had lower odds of reporting fewer opportunities to purchase fast food. None of the geographic access measures was significantly associated with food security status. CONCLUSIONS: Caregivers with children who experienced hunger perceived that they had less access to healthy affordable food in their community, even though grocery stores were present. Approaches to improve perceived access to healthy affordable food should be considered as part of the overall approach to improving food security and eliminating child hunger.


Assuntos
Dieta , Abastecimento de Alimentos , Fome , Características de Residência , Criança , Estudos Transversais , Características da Família , Geografia , Humanos , Pobreza , South Carolina
19.
Prev Med ; 83: 41-5, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26656403

RESUMO

OBJECTIVE: Our research examined the prevalence of food insecurity among adults with self-reported diabetes and whether food insecurity was associated with cutting back ("scrimping") on prescribed medications because of financial constraints. METHODS: We conducted a cross-sectional analysis of data from the 2011 National Health Interview Survey (NHIS). Adults completing this survey were considered to have diabetes if they reported current use of insulin or "diabetic pills" (n=3,242). Food insecurity was determined with a 10-item scale; respondents were categorized as food secure (FS), marginally food secure (MFS) or food insecure (FI). RESULTS: Approximately one in six adults in NHIS with diabetes reported food insecurity (17.0%), and an additional 8.8% were marginally FS. An individual was considered to be scrimping on medications if he/she gave a "yes" response to at least one of four questions pertaining to reduced, delayed or avoided medication use. Overall, 18.9% of respondents with diabetes reported one or more type of medication scrimping: 11.7% of FS individuals, 27.7% of MFS individuals and 45.6% of FI individuals. In adjusted analyses, marginal food security and food insecurity remained strongly associated with scrimping. CONCLUSIONS: One-quarter of adults with diabetes may have difficulty obtaining foods appropriate for a diabetic diet; a substantial number of these individuals also fail to obtain or take medications. Practitioners may miss either problem unless targeted questions are included in clinical encounters. Clinicians should consider referring FI and MFS diabetic patients to community food resources.


Assuntos
Diabetes Mellitus/economia , Abastecimento de Alimentos/economia , Adesão à Medicação/estatística & dados numéricos , Adulto , Estudos Transversais , Diabetes Mellitus/dietoterapia , Diabetes Mellitus/tratamento farmacológico , Feminino , Inquéritos Epidemiológicos , Humanos , Masculino , Pessoa de Meia-Idade , Pobreza/economia , Fatores Socioeconômicos , Estados Unidos , Adulto Jovem
20.
Ecol Food Nutr ; 55(2): 119-40, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26654767

RESUMO

The objective of this study is to develop a structured observational method for the systematic assessment of the food-choice architecture that can be used to identify key points for behavioral economic intervention intended to improve the health quality of children's diets. We use an ethnographic approach with observations at twelve elementary schools to construct our survey instrument. Elements of the structured observational method include decision environment, salience, accessibility/convenience, defaults/verbal prompts, number of choices, serving ware/method/packaging, and social/physical eating environment. Our survey reveals important "nudgeable" components of the elementary school food-choice architecture, including precommitment and default options on the lunch line.


Assuntos
Comportamento de Escolha , Preferências Alimentares , Serviços de Alimentação , Estudos Observacionais como Assunto , Criança , Comportamento Infantil , Dieta , Humanos , Almoço , Inquéritos Nutricionais , Instituições Acadêmicas , Fatores Socioeconômicos , Estudantes
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