scholarly journals Detection of Uropathogens by Using Chromogenic Media (Hicrome UTI agar), CLED agar and other Conventional Media

1970 ◽  
Vol 6 (1) ◽  
pp. 46-50 ◽  
Author(s):  
R Parveen ◽  
SK Saha ◽  
SM Shamshuzzaman ◽  
AL Rashid ◽  
A Chowdhury ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Growth Rate ◽  
Key Words ◽  
Blood Agar ◽  
Macconkey Agar ◽  
Isolation And Identification ◽  
Enterococcus Spp ◽  
Presumptive Identification ◽  
Agar Media ◽  
Better Than

This study was undertaken to find media better than routinely used media in isolation of uropathogens.Three hundred urine samples having pus cells >_ 5/ HPF were enrolled for the study. Comparison of isolation and identification of uropathogens among HiCrome UTI Agar media, 5% Sheep Blood agar & MacConkey agar and CLED agar media were done. Among them 95(31.67%) samples showed single growth, 6 (2%) showed mixed growth and 199 (66.67%) showed no growth. Rate of presumptive identification of organisms in primary culture plate were high in HiCrome UTI agar media. For Escherichia coli, it was 94.20% whereas in CLED agar it was 79.71% and by Blood agar and MacConkey agar media in combination it was 82.61%. All the Enterococcus spp. were identified in HiCrome UTI agar media, 33.33% in CLED agar media but none in Blood agar and MacConkey agar media. Among the mixed growth, 100% organisms were identified on HiCrome UTI Agar media due to distinct colour produced by the different organisms, whereas in one (16.67%) sample (mixed Esch.coli and Pseudomonas spp.) organisms were identified on other three media. Key words: UTI; Uropathogen; HiCrome UTI Agar media DOI: 10.3329/fmcj.v6i1.7411 Faridpur Med. Coll. J. 2011;6(1): 46-50

scholarly journals Chromogenic Agar Medium : A Versatile Tool for the Diagnosis of UTI

2018 ◽  
Vol 25 ◽  
pp. 64-71
Author(s):  
S Gul Nahar ◽  
M Bulbul Hasan ◽  
Mst Rokeya Khatun ◽  
M Nawshad Ali ◽  
DK Mohanta
Keyword(s):  
Urine Culture ◽  
Blood Agar ◽  
Macconkey Agar ◽  
Biochemical Tests ◽  
College Hospital ◽  
Medical College ◽  
Presumptive Identification ◽  
Versatile Tool ◽  
Chromogenic Agar ◽  
Agar Media

Objective: The present study was done on Chromogenic agar media to identify uropathogens more efficiently by its characteristic colony colour for each of the organism.Methodology: A total 300 sample were collected from Rajshahi Medical College Hospital, Bangladesh. Urine samples of the suspected UTI cases, showing pus cells >5/HPF on microscopic examination were included for urine culture simultaneously onto Chromogenic agar media, Blood agar and MacConkey agar media.Results: Culture yielded 139 (46.33%) bacterial growth among them, 133 (44.33%) showed single organism and remaining 06 (2.00%) showed mixed growth of two organisms in different combinations. It is evident from the present study that both Chromogenic agar media and Blood agar (BA) media supported growth of all 145 bacteria, while MacConkey (MAC) agar yielded 133(91.72%) bacterial growths. The rate of presumptive identification of the isolates was found significantly higher (97.24%) on Chromogenic agar media when compared with the MacConkey agar (80.68%) and Blood agar (27.58%) media. Out of 91 E. coli isolated, 88(96.70%) could be identified differentially on Chromogenic agar media in contrast to 85(93.40%) on MacConkey agar and only 06(06.59%) on Blood agar. Again, all 06 (100%) of the isolate-pairs of mixed growth were identified distinctly on Chromogenic agar media, whereas both Blood agar and MacConkey agar media could revealed only 01(16.66%) of the polymicrobial growth.Conclusion: Chromogenic agar media has been documented for its very high yielding rate, rapid presumptive identification of both single and polymicrobial growths with greater precision and avoidance of biochemical tests for further identification of uropathogens. Thus it can be recommended as primary urine culture medium to be used by the clinical microbiology laboratories.TAJ 2012; 25: 64-71

Comparison of Agar Media for Detection and Quantification of Shiga Toxin–Producing Escherichia coli in Cattle Feces

2016 ◽  
Vol 79 (6) ◽  
pp. 939-949 ◽  
Author(s):  
ZACHARY R. STROMBERG ◽  
GENTRY L. LEWIS ◽  
RODNEY A. MOXLEY
Keyword(s):  
Escherichia Coli ◽  
Shiga Toxin ◽  
Primary Objective ◽  
Potassium Tellurite ◽  
Cattle Feces ◽  
Agar Media ◽  
Optimal Medium ◽  
Bovine Feces ◽  
Detection And Quantification ◽  
Better Than

ABSTRACT The isolation and quantification of non-O157 Shiga toxin–producing Escherichia coli (STEC) from cattle feces are challenging. The primary objective of this study was to evaluate the performance of selected agar media in an attempt to identify an optimal medium for the detection and quantification of non-O157 STEC in cattle feces. Comparison studies were performed using CHROMagar STEC, Possé differential agar (Possé), Possé modified by the reduction or addition of antimicrobials, STEC heart infusion washed blood agar with mitomycin C (SHIBAM), and SHIBAM modified by the addition of antimicrobials. Fourteen STEC strains, two each belonging to serogroups O26, O45, O103, O111, O121, O145, and O157, were used to test detection in inoculated fecal suspensions at concentrations of 102 or 103 CFU/g. One STEC strain from each of these seven serogroups was used to estimate the concentration of recovered STEC in feces inoculated at 103, 104, or 105 CFU/g. Significantly more suspensions (P < 0.05) were positive for STEC when plated on Possé containing reduced concentrations of novobiocin and potassium tellurite compared with SHIBAM, but not SHIBAM modified by containing these same antimicrobials at the same concentrations. Numerically, more suspensions were positive for STEC by using this same form of modified Possé compared with Possé, but this difference was not statistically significant. More suspensions were positive for STEC cultured on CHROMagar STEC compared with those on Possé (P < 0.05) and on modified Possé (P = 0.05). Most inoculated fecal suspensions below 104 CFU/g of feces were underestimated or not quantifiable for the concentration of STEC by using CHROMagar STEC or modified Possé. These results suggest that CHROMagar STEC performs better than Possé or SHIBAM for detection of STEC in bovine feces, but adjustments in the concentrations of novobiocin and potassium tellurite in the latter two media result in significant improvements in their performance.

scholarly journals Evaluation of stx1, stx2, hlyA, and eaeA Virulence Genes in Escherichia coli O157:H7 Isolated from Meat (Beef and Mutton) in Hamedan, Iran, During 2015-2016

2020 ◽  
Vol 8 (2) ◽  
pp. 55-59
Author(s):  
Fatemeh Binandeh ◽  
Mohammadreza Pajohi-Alamoti ◽  
Pezhman Mahmoodi ◽  
Azam Ahangari
Keyword(s):  
Escherichia Coli ◽  
Virulence Genes ◽  
Escherichia Coli O157 ◽  
Isolation And Identification ◽  
E Coli ◽  
Multiplex Pcr Assay ◽  
Agar Media ◽  
Cattle Meat ◽  
Meat Samples ◽  
Encoding Genes

Background and Objectives: Consuming raw or undercooked cattle meat is the most common transmission way of infection with Escherichia coli O157:H7. The present study aimed to identify virulence genes stx1, stx2, hlyA, and eaeA in E. coli isolated from meat samples (beef and mutton) in Hamedan during 2015 and 2016. Materials and Methods: For this purpose, the swabs were randomly taken from 160 meat samples including 80 beef samples and 80 mutton samples from butcher shops. Isolation and identification of E. coli cells were conducted by culturing the swab samples on MacConkey agar and Eosin methylene blue agar media. Then, the identity of the suspected E. coli O157:H7 colonies was investigated by a multiplex PCR assay and eventually, the isolates were evaluated for the presence of stx1, stx2, hlyA, eaeA virulence genes. Results: The results showed that out of 160 cultured samples on the selective media, 60 samples (37.5%) were contaminated with E. coli. O157:H7, O157, and H7 strains were identified using PCR, among which only E. coli O157:H7 possessed all four virulence factor encoding genes. Conclusion: The results of this study showed that beef could be a reservoir for E. coli O157:H7, and it may be involved in the transmission of this pathogen to humans.

scholarly journals Comparative Study of Hicrome Agar Medium with Conventional Culture System for the Isolation of Uropathogens

2018 ◽  
Vol 24 (2) ◽  
pp. 128-135
Author(s):  
S Gul Nahar ◽  
M Bulbul Hasan ◽  
Mst Rokeya Khatun ◽  
M Nawshad Ali
Keyword(s):  
Urine Culture ◽  
Culture Media ◽  
Agar Medium ◽  
Blood Agar ◽  
Macconkey Agar ◽  
Biochemical Tests ◽  
College Hospital ◽  
Conventional Culture ◽  
Presumptive Identification ◽  
Chromogenic Agar

Objective: The present study was done to compare the performance of chromogenic agar medium and conventional culture media for the isolation and presumptive identification of uropathogen.Methodology: A total 300 sample were collected from Rajshahi Medical College Hospital, Bangladesh during January to June, 2008. Urine samples of the suspected UTI cases, showing pus cells >5/HPF on microscopic examination were included for urine culture simultaneously onto 2 conventional media (Blood agar and MacConkey agar) and chromogenic agar medium (HiCrome UTI agar medium). Results: Culture yielded 139 (46.33%) bacterial growth among them, 133 (44.33%) showed single organism and remaining 06 (2.00%) showed mixed growth of two organisms in different combinations. It is evident from the present study that both HiCrome UTI agar and Blood agar (BA) media supported growth of all 145 bacteria, while MacConkey (MAC) agar yielded 133(91.72%) bacterial growths. The rate of presumptive identification of the isolates was found significantly higher (97.24%) on HiCrome UTI agar when compared with the MacConkey agar (80.68%) and Blood agar (27.58%) media. Out of 91 E. coli isolated, 88(96.70%) could be identified differentially on HiCrome UTI agar medium in contrast to 85(93.40%) on MacConkey agar and only 06(06.59%) on Blood agar. Again, all 06 (100%) of the isolate-pairs of mixed growth were identified distinctly on HiCrome UTI agar, whereas both Blood agar and MacConkey agar media could revealed only 01(16.66%) of the polymicrobial growth.Conclusion: HiCrome UTI agar medium has been documented for its very high yielding rate, rapid presumptive identification of both single and polymicrobial growths with greater precision and avoidance of biochemical tests for further identification of uropathogens. Thus it can be recommended as primary urine culture medium to be used by the clinical microbiology laboratories.TAJ 2011; 24(2): 128-135

Descriptive and categorical analyses of live animals imported into Nigeria through an international airport and their enterobacterial load

2020 ◽  
pp. 1-9
Keyword(s):  
Escherichia Coli ◽  
Descriptive Statistics ◽  
Macconkey Agar ◽  
Biochemical Tests ◽  
Isolation And Identification ◽  
Chi Square ◽  
Klebsiella Species ◽  
International Airport ◽  
Animal Populations ◽  
Faecal Samples

Introduction: Globalization, international trade, and the increase in human and animal populations has enhanced the spread of infectious pathogens across countries. The volume, sources, species, enterobacterial load, and Enterobacteriaceae bacteria of live animals imported through Murtala Muhammed International Airport into Nigeria were investigated. Methods: Data of imported animals from various continents into Nigeria between years 2010 and 2016 were retrieved from Department of Veterinary and Pest Control Services. Faecal samples were collected from dogs and cats imported from April to July 2017 for isolation and identification of Enterobacteriaceae bacteria, and enterobacterial load assessment using MacConkey agar, Nutrient agar and biochemical tests. Data were analysed using descriptive statistics and Chi-square at p < 0.05. Results: A total of 6,349 (median = 676; range: 362-1666) animals were imported. Africa had the largest volume (55.7%), Europe (28.0%) and Oceania lowest (0.1%). Canine (dogs) and feline (cats) (59.9%), caprine and ovine (12.1%), bovine (11.5%), porcine (10.2%) and equine (6.2%) were imported. Continent of origin (χ2= 21.63, p < 0.0001) and species (χ2 = 1200.00, p < 0.0001) were significantly associated with volume of importation. Mean Enterobacteriaceae Counts were 18.126±0.84×107 and 3.855±0.53×107 CFU/gram for dogs and cats, respectively. Escherichia coli, Proteus, Shigella, Citrobacter and Klebsiella species were isolated. Significance: Live animals, mostly dogs and cats imported frequently from Africa and Europe into Nigeria through the airport may constitute a risk of introducing infectious and zoonotic pathogens into the country. Animals imported into Nigeria should be regularly quarantined and assessed microbiologically to ensure disease prevention.

Rapid Presumptive Identification of Gardnerella vaginalis (Haemophilus vaginalis) from Human Blood Agar Media

1981 ◽  
Vol 14 (1) ◽  
pp. 108-110 ◽  
Author(s):  
Carol E. Shaw ◽  
Michele E. Forsyth ◽  
William R. Bowie ◽  
William A. Black
Keyword(s):  
Human Blood ◽  
Blood Agar ◽  
Gardnerella Vaginalis ◽  
Presumptive Identification ◽  
Agar Media

Competition between strains of Escherichia coli with and without plasmid RP4 during chemostat growth

1991 ◽  
Vol 37 (7) ◽  
pp. 509-512 ◽  
Author(s):  
Zuhair Numan ◽  
W. A. Venables ◽  
J. W. T. Wimpenny
Keyword(s):  
Escherichia Coli ◽  
Growth Rate ◽  
Key Words ◽  
Growth Kinetic ◽  
Initial Period ◽  
Kinetic Constants ◽  
Continuous Cultures ◽  
The Difference ◽  
Selection Of ◽  
Period Of Oscillation

Escherichia coli strains J53(nal) and J53(RP4) were grown together in glucose-limited continuous cultures. Based on the measured growth kinetic constants of the two strains, take-over of the cultures by J53(RP4) was predicted. However, in practice, an initial period of predominance by J53(RP4) was always followed by a prolonged period in which relative numerical proportions of the two strains oscillated widely. This period of oscillation was removed or greatly reduced when the difference between the predicted growth-rate potentials of the two strains was increased by selection of a chemostat-adapted variant of J53(RP4). Key words: competition, chemostat, plasmid, Escherichia coli.

scholarly journals Study of the Antibacterial Efficacy of Bainiku-Ekisu against Pathogens

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Deng-Jye Yang ◽  
Hsin-Yi Chen ◽  
Shih-Chuan Liu
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Growth Rate ◽  
Minimum Inhibitory Concentration ◽  
Inhibitory Concentration ◽  
Antibacterial Efficacy ◽  
Health Food ◽  
Japanese Apricot ◽  
E Coli ◽  
Better Than

The research was undertaken to determine the bacteriostatic effects of the concentrate of Japanese apricot juice (bainiku-ekisu), which is a popular health food in Taiwan and Japan, on Enterococcus faecalis ATCC 29212, Staphylococcus aureus ATCC 25923, and Escherichia coli ATCC 25922. The results show that E. faecalis, S. aureus, and E. coli could be killed or inhibited by bainiku-ekisu at concentrations between 1.0 and 10.0 mg/mL. The minimum inhibitory concentration (MIC) was 1 mg/mL for all strains, and the minimum bactericidal concentrations (MBCs) were 5, 2.5, and 2.5 mg/mL for E. faecalis, S. aureus, and E. coli, respectively. Using the growth rate to calculate the MICs and MBCs, the MICs were 1.55, 1.43, and 0.97 mg/mL, and the MBCs were 2.59, 2.63, and 2.25 mg/mL for E. faecalis, S. aureus, and E. coli, respectively. According to the D values, E. faecalis and S. aureus exhibited lower resistance than E. coli at lower bainiku-ekisu concentrations (1.0 and 2.5 mg/mL), and the resistance of these two pathogens was better than that of E. coli at higher bainiku-ekisu concentrations (5.0 and 10.0 mg/mL). The Z values of the E. faecalis, S. aureus, and E. coli strains were 3.47, 4.93, and 11.62 mg/mL, respectively.

scholarly journals Occurrence of multi-drug resistant Escherichia coli and Escherichia coli O157:H7 in meat and swab samples of various contact surfaces at abattoir and butcher shops in Jimma town, Southwest district of Ethiopia

2020 ◽  
Author(s):  
Mengistu Sebsibe Abayneh ◽  
Eyob Tekalign Asfaw
Keyword(s):  
Escherichia Coli ◽  
Drug Resistant ◽  
Macconkey Agar ◽  
Isolation And Identification ◽  
Raw Meat ◽  
E Coli ◽  
Significant Difference ◽  
Contact Surfaces ◽  
Butcher Shops ◽  
Jimma Town

Abstract Background: Raw meat is one of commonly consumed traditional diets in Ethiopia. However, unhygienic processing and distribution practices were risky for contaminations of meat leads to human infection. This study was conducted to assess the presence of multi-drug resistant E. coli and E. coli O157:H7 in meats, ceacal content, and swabs samples of different contact surfaces at abattoir and butcher shops in Jimma town, Southwest Ethiopia. Methodology: A cross-sectional descriptive study was conducted from April to July, 2018. The isolation and identification processes passed through enrichment of samples with modified tryptone soy broth (mTSB), streaked onto MacConkey agar and Cefixime- tellurite sorbitol MacConkey agar, biochemical testing (indole and TSI), followed by latex agglutination test. Results: Out of 505 samples, 102(20.2%) and 27(5.4%) were positive for E. coli and E. coli O157:H7, respectively. Of these, 55(19.3%) and 47 (21.4%) of E. coli and 17 (6.0%) and 10 (4.5%) of E. coli O157:H7 were isolated from the abattoir and butcher shop samples, respectively. A significant difference in the occurrences was observed among sample sources. Antimicrobials susceptibility test result showed that, 92.2% to 96.1% of E. coli and 85.5% to 96.3% of E. coli O157:H7 were susceptible to third generation cephalosporin, ciprofloxacin, gentamycin, kanamycin, streptomycin and chloramphenicol. About 91.2% and 97.1% of E. coli and 88.9 % and 92.6% of E. coli 0157:H7 were resistant to ampicillin and erythromycin, respectively. A total of 98 (76.0%) E. coli and E. coli O157:H7 isolates were resistant to two or more classes of antibiotics. All abattoir and butcher shops workers were not have any formal education and training certificate on food safety and unhygienic practice were also observed.Conclusion: The presence of E. coli and E. coli O157:H7 including multi-drugs resistant isolates in raw meat highlights how the current meat processing and distribution practice was unhygienic. Therefore, strategies in the prevention and control of food borne infections that could be caused by multi-drug resistant strains will depends much on hygienic processing and distribution practices of meat.

scholarly journals Comparative evaluation of different culture media for the isolation and identification of common urinary pathogens

2017 ◽  
Vol 5 (8) ◽  
pp. 3676 ◽  
Author(s):  
Aarti Chaturvedi ◽  
Ritu Garg ◽  
Varsha A. Singh
Keyword(s):  
Culture Media ◽  
Ambient Air ◽  
Work Load ◽  
Blood Agar ◽  
Macconkey Agar ◽  
Isolation And Identification ◽  
Gram Positive ◽  
Continuous Increase ◽  
Gram Negative ◽  
Gram Positive Cocci

Background: Urinary tracts infections (UTIs) are one of the most common infections encountered in hospital as well as community settings. There is continuous increase in incidence of this infection leading to more consumption of antimicrobial drugs. Urine cultures occupy most of the workload of routine microbiology laboratories in developing country like India. Accurate and rapid identification of pathogens is the primary responsibility of a clinical microbiology laboratory.Methods: Mid-stream urine and catheterized samples were collected. Cultures were plated on blood agar, MacConkey agar and cysteine lactose electrolyte deficient media and incubated overnight at 35°C-37°C in ambient air. Colonies on the MacConkey agar, CLED agar and blood agar were also identified. The final identification of the isolates was done using standard identification protocol.  Antimicrobial susceptibility was performed by Kirby- Bauer disc diffusion test according to the CLSI guidelines.Results: Out of 500 urine samples processed, 211 samples showed significant growth, 24 samples showed polymicrobial growth and 265 samples were reported sterile.  Out of these 211, 199 showed pure growth and 12 showed mixed growths. Out of 199 pure growths, 126 were gram negative bacilli, 56 were gram positive cocci and 17 were yeast. All the gram-negative bacilli grown on all the media but most of the gram-positive cocci and yeast were unable to grow on Mac-Conkey agar and blood agar but grew successfully on CLED agar.Conclusions: So, in resource constrain laboratories, CLED agar can be used as media of choice for isolation of common uropathogens because it is user friendly, cost effective and decreases work load of the laboratories.

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