Modification of the Brown and Brenn Gram Stain for the Differential Staining of Gram-Positive and Gram-Negative Bacteria in Tissue Sections

1966 ◽  
Vol 46 (4) ◽  
pp. 472-474 ◽  
Author(s):  
Richard Dee Taylor
Keyword(s):  
Differential Staining ◽  
Gram Negative Bacteria ◽  
Gram Stain ◽  
Gram Positive ◽  
Gram Negative ◽  
Tissue Sections

THE EFFECT OF SALMINE ON BACTERIA

1958 ◽  
Vol 4 (2) ◽  
pp. 65-71 ◽  
Author(s):  
Thomas D. Brock
Keyword(s):  
Sodium Chloride ◽  
Gram Negative Bacteria ◽  
Bacteriostatic Activity ◽  
Bactericidal Action ◽  
Gram Stain ◽  
Gram Positive ◽  
Gram Negative ◽  
Bacterial Surface ◽  
Bactericidal Effects

The bacteriostatic and bactericidal effects of salmine on various bacteria have been studied. Salmine has more bacteriostatic activity against Gram-positive than against Gram-negative bacteria. It is bactericidal in water but not in broth, and this bactericidal action occurs against both Gram-positive and Gram-negative bacteria. It has been shown that salmine causes agglutination of washed suspensions of certain bacteria and this agglutination is not correlated directly with the Gram stain. Salmine causes an increase in the turbidity of washed cells of all bacteria, Gram-positive and Gram-negative, and differs in this respect from the solutes sodium chloride and glucose, which affect only Gram-negative species.A comparison has been made of the effects of salmine and polymyxin and it has been concluded that salmine may also act by attachment to the bacterial surface.

scholarly journals POLA KUMAN BERDASARKAN PEWARNAAN GRAM PADA TINJA ANAK DENGAN DIARE DI RSUP PROF. DR. R. D. KANDOU MANADO

e-CliniC ◽  
2014 ◽  
Vol 2 (1) ◽  
Author(s):  
I Made Dwi Pramana
Keyword(s):  
Bacterial Infection ◽  
Microscopic Examination ◽  
Gram Negative Bacteria ◽  
Gram Stain ◽  
Gram Positive ◽  
Cross Sectional ◽  
Gram Negative ◽  
Consecutive Sampling ◽  
Gram Staining ◽  
In Infants And Children

Abstract: Background: Bacterial infection is one of the causes of diarrhea in infants and children. Bacteria are a group of microorganisms belongs to the prokaryotes which are structurally simpler than eukaryotics. There were many examinations used to detect the bacteria caused diarrhea, one of them was microscopic examination of the Gram stain smear. This technique is to determine whether the examination is Gram positive or Gram negative bacteria. Objective: This study aimed to determine the pattern of bacteria by Gram stain in children’s feces with diarrhea. Methods: This research used a descriptive designed with cross sectional approach by consecutive sampling from November to December 2013. There were 50 children in this study. Result: The results showed, 29 girls (58%) and 21 boys (42%). There were 34 children (68%) as the largest group that belongs to 1 - <3 years old. The results of feces microscopic examination showed 29 children (58%) got contaminated by bacteria. 23 children (46%) were contaminated with Gram positive and Gram negative bacteria. Gram negative Basil bacteria ware the most common bacteria that found in 23 preparations. Conclusion: Gram-negative bacilli germ were the most common germs that found in children’s feces with diarrhea and the numbers of diarrhea on November to December 2013 were increased. Key words: bacterial pattern, Gram staining, children, diarrhea  Abstrak: Latar belakang: Infeksi bakteri merupakan salah satu penyebab terjadinya diare pada bayi dan anak. Bakteri merupakan mikroorganisme yang termasuk dalam golongan prokariot yang strukturnya lebih sederhana dari eukariot. Banyak pemeriksaan yang dilakukan untuk mendeteksi bakteri penyebab diare, salah satunya dengan pemeriksaan mikroskopis pulasan yaitu pewarnaan Gram yang merupakan salah satu teknik pemeriksaan untuk menentukan apakah termasuk bakteri Gram positif atau bakteri Gram negatif. Tujuan penelitian: Penelitian ini bertujuan unutk mengetahui pola kuman berdasarkan pewarnaan Gram pada tinja anak dengan diare. Metode: Penelitian ini menggunakan desain penelitian deskriptif dengan pendekatan cross sectional yang dilakukan dengan cara consecutive sampling dari bulan November sampai Desember 2013. Sampel penelitian berjumlah 50 anak dan dilakukan pemeriksaan pewarnaan Gram. Hasil penelitian: Hasil penelitian didapatkan, perempuan 29 anak (58%) dan Laki-laki 21 anak (42%). Kelompok umur terbanyak 1 ─ <3 berjumlah 34 anak (64%). Hasil pemeriksaan mikroskopis feses ditemukan positif bakteri sebanyak 29 anak (58%). Bakteri Gram positif dan Gram negatif didapatkan berjumlah 23 anak (46%). Bakteri Basil Gram negatif merupakan bakteri terbanyak yang ditemukan yaitu 23 preparat. Kesimpulan: Kuman basil Gram negatif merupakan kuman terbanyak yang ditemukan pada tinja anak dengan diare dan terjadi peningkatan angka kejadian diare pada bulan November – Desember 2013. Kata kunci : pola kuman, pewarnaan Gram , anak, diare

Rapid demonstration of septic or infectious arthritis due to Gram-negative bacteria

1992 ◽  
Vol 50 (1) ◽  
pp. 686-687
Author(s):  
Jacob S. Hanker ◽  
Paul R. Gross ◽  
Beverly L. Giammara
Keyword(s):  
Chronic Arthritis ◽  
Blood Cultures ◽  
Gram Negative Bacteria ◽  
Infectious Arthritis ◽  
Bacterial Arthritis ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria

Blood cultures are positive in approximately only 50 per cent of the patients with nongonococcal bacterial infectious arthritis and about 20 per cent of those with gonococcal arthritis. But the concept that gram-negative bacteria could be involved even in chronic arthritis is well-supported. Gram stains are more definitive in staphylococcal arthritis caused by gram-positive bacteria than in bacterial arthritis due to gram-negative bacteria. In the latter situation where gram-negative bacilli are the problem, Gram stains are helpful for 50% of the patients; they are only helpful for 25% of the patients, however, where gram-negative gonococci are the problem. In arthritis due to gram-positive Staphylococci. Gramstained smears are positive for 75% of the patients.

In-vitro Antioxidant and Antibacterial Activity of Methanolic Extract of Shorea robusta Gaertn. F. Resin

2016 ◽  
Vol 6 (4) ◽  
pp. 68
Author(s):  
Sushma Vashisht ◽  
Manish Pal Singh ◽  
Viney Chawla
Keyword(s):  
Antibacterial Activity ◽  
Methanolic Extract ◽  
Diffusion Method ◽  
Gram Negative Bacteria ◽  
Disc Diffusion ◽  
Gram Positive ◽  
Gram Negative ◽  
Shorea Robusta ◽  
Dose Dependent ◽  
Resin Extract

The methanolic extract of the resin of Shorea robusta was subjected to investigate its antioxidant and antibacterial properties its utility in free radical mediated diseases including diabetic, cardiovascular, cancer etc. The methanol extract of the resin was tested for antioxidant activity using scavenging activity of DPPH (1,1-diphenyl-2-picrylhydrazil) radical method, reducing power by FeCl3 and antibacterial activity against gram positive and gram negative bacteria using disc diffusion method. The phytochemical screening considered the presence of triterpenoids, tannins and flavoniods. Overall, the plant extract is a source of natural antioxidants which might be helpful in preventing the progress of various oxidative stress mediated diseases including aging. The half inhibition concentration (IC50) of resin extract of Shorea robusta and ascorbic acid were 35.60 µg/ml and 31.91 µg/ml respectively. The resin extract exhibit a significant dose dependent inhibition of DPPH activity. Antibacterial activity was observed against gram positive and gram negative bacteria in dose dependent manner.Key Words: Shorea robusta, antioxidant, antibacterial, Disc-diffusion, DPPH.

Antibacterial activity of magnesium oxide nanoparticles prepared by Calcination method

2019 ◽  
Vol 10 (03) ◽  
Author(s):  
Elaf Ayad Kadhem ◽  
Miaad Hamzah Zghair ◽  
Sarah , Hussam H. Tizkam, Shoeb Alahmad Salih Mahdi ◽  
Hussam H. Tizkam ◽  
Shoeb Alahmad
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Magnesium Oxide Nanoparticles ◽  
Agar Disc

magnesium oxide nanoparticles (MgO NPs) were prepared by simple wet chemical method using different calcination temperatures. The prepared NPs were characterized by Electrostatic Discharge (ESD), Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). It demonstrates sharp intensive peak with the increase of crystallinty and increase of the size with varying morphologies with respect to increase of calcination temperature. Antibacterial studies were done on gram negative bacteria (E.coli) and gram positive bacteria (S.aureus) by agar disc diffusion method. The zones of inhibitions were found larger for gram positive bacteria than gram negative bacteria, this mean, antibacterial MgO NPs activity more active on gram positive bacteria than gram negative bacteria because of the structural differences. It was found that antibacterial activity of MgO NPs was found it has directly proportional with their concentration.

Antimicrobial Activity of Iron-Halide Complexes Against Gram-Positive and Gram-Negative Bacteria

2020 ◽  
Author(s):  
Nusrat Abedin ◽  
Abdullah Hamed A Alshehri ◽  
Ali M A Almughrbi ◽  
Olivia Moore ◽  
Sheikh Alyza ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Resistance ◽  
Extracellular Dna ◽  
Antibiofilm Activity ◽  
Gram Negative Bacteria ◽  
Bacterial Strains ◽  
Gram Positive ◽  
Gram Negative ◽  
Antimicrobial Substances ◽  
Mammalian Cell Lines

Antimicrobial resistance (AMR) has become one of the more serious threats to the global health. The emergence of bacteria resistant to antimicrobial substances decreases the potencies of current antibiotics. Consequently, there is an urgent and growing need for the developing of new classes of antibiotics. Three prepared novel iron complexes have a broad-spectrum antimicrobial activity with minimum bactericidal concentration (MBC) values ranging from 3.5 to 10 mM and 3.5 to 40 mM against Gram-positive and Gram-negative bacteria with antimicrobial resistance phenotype, respectively. Time-kill studies and quantification of the extracellular DNA confirmed the bacteriolytic mode of action of the iron-halide compounds. Additionally, the novel complexes showed significant antibiofilm activity against the tested pathogenic bacterial strains at concentrations lower than the MBC. The cytotoxic effect of the complexes on different mammalian cell lines show sub-cytotoxic values at concentrations lower than the minimum bactericidal concentrations.

BAKTERI PADA KARANG SCLERACTINIA DI KAWASAN PERAIRAN BUNAKEN, MOROTAI DAN RAJA AMPAT

2020 ◽  
Vol 8 (1) ◽  
pp. 122
Author(s):  
Eghbert Eghbert Elvan Eghbert Elvan Ampou ◽  
Iis Iis Triyulianti ◽  
Nuryani Widagti ◽  
Suciadi Catur Nugroho ◽  
Yuli Pancawati
Keyword(s):  
Scleractinian Coral ◽  
Gram Negative Bacteria ◽  
Hard Coral ◽  
Field Sampling ◽  
Bacterial Isolation ◽  
Gram Positive ◽  
Coral Mucus ◽  
Gram Negative ◽  
Gram Positive Bacteria

Research on hard coral (Scleractinian coral) contaminated with bacteria is still not much done, especially in Indonesian waters. This study took samples of coral mucus in 2010 at 3 (three) different locations, namely Bunaken (May); Morotai (September) and Raja Ampat (November), which focused on the analysis of Research on hard coral (Scleractinian coral) contaminated with bacteria is still not much done, especially in Indonesian waters. This study took samples of coral mucus in 2010 at 3 (three) different locations, namely Bunaken (May); Morotai (September) and Raja Ampat (November), which focused on the analysis of gram-positive and gram-negative bacteria. The method used for field sampling is time swim, which is by diving at a depth of 5-10 meters for ± 30 minutes and randomly taking samples of coral mucus using siring or by taking directly on corals (reef branching). Mucus samples were analyzed by bacterial isolation in the laboratory. The result shows that there were differences between gram-positive and gram-negative bacteria in the three research sites and that gram-positive bacteria were higher or dominant. Further research that can identify the bacteria species and explain its relationship to the ecosystem is highly recommended.Keywords: Bacteria, Scleractinian coral, gram-positive and -negative, Bunaken, Morotai, Raja Ampat  AbstrakPenelitian tentang karang keras (Scleractinian coral) yang terkontaminasi bakteri masih belum banyak dilakukan, terutama di perairan Indonesia. Penelitian ini mengambil sampel mucus karang pada tahun 2010 di 3 (tiga) lokasi berbeda, yakni Bunaken (Mei); Morotai (September) dan Raja Ampat (November), yang difokuskan pada analisis bakteri gram postif dan gram negatif. Metode yang digunakan untuk pengambilan sampel di lapangan adalah time swim, yaitu dengan penyelaman pada kedalaman 5-10 meter selama ±30 menit dan mengambil sampel mucus karang secara acak menggunakan siring atau dengan mengambil langsung pada karang (fraksi cabang). Sampel mucus dianalisis dengan cara isolasi bakteri di laboratorium. Hasil analisis menunjukkan bahwa ada perbedaan antara bakteri gram positif dan gram negative di tiga lokasi survei dan bakteri gram positif lebih tinggi atau dominan. Penelitian lebih lanjut yang dapat menentukan jenis bakteri serta menjelaskan hubungannya dengan ekosistem sangat disarankan untuk dilakukan.Kata Kunci : Bakteri, Scleractinian coral, gram positif dan negatif, Bunaken, Morotai, Raja Ampat

SDS-NaOH solution for rapid discrimination of Gram-positive and Gram-negative bacteria in urine

2014 ◽  
Vol 35 (8) ◽  
pp. 907
Author(s):  
Hu LI ◽  
Ming-kun CHEN ◽  
Hui WANG ◽  
Yan CHEN ◽  
Xian-hao SU ◽  
...  
Keyword(s):  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Naoh Solution ◽  
Rapid Discrimination

The Antimicrobial Activity of Red Sour Cherry (Prunus cerasus L.) Extracts: II. Measurement of Sensitivity and Attenuation of Gram-Positive and Gram-Negative Bacteria and C. albicans in Culture

2013 ◽  
Vol 9 (3) ◽  
pp. 217-232
Author(s):  
Lama Hanbali ◽  
Raya Almor ◽  
Diana Bou Teen ◽  
Rana Ghadieh ◽  
Hiba Hasan ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Sour Cherry ◽  
Prunus Cerasus ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative
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