TEST TEN, SCORE TEN - Introduction of RINGBIO Amino QuaTest Kit

TEST TEN, SCORE TEN - Introduction of RINGBIO Amino QuaTest Kit

1. Introduction to aminoglycoside antibiotics

Aminoglycoside antibiotics are chemical substances extracted from Streptomyces or Pseudomonas or synthesized from natural products. They have good chemical stability and can be dissolved in water but are hardly soluble in fats and oils. It has a good killing effect on Gram-positive bacteria and negative bacteria, and is a broad-spectrum antibiotic. Aminoglycosides combine with the ribosomal 30S subunit of the bacterium and the initiation codon of the messenger RNA to form an immobile complex, which called a streptomycin monomer. Since protein synthesis is accomplished by the movement of ribosomes on the messenger RNA strand, the formation of streptomycin monomers stops the synthesis of the protein at the initial stage, thereby affecting the survival of the bacteria. In addition, aminoglycosides can affect protein synthesis in two other ways. One way is to stop the synthesis of the protein by deconstructing the ribosome that is undergoing protein synthesis; the other is to provide the wrong amino acid so that the synthesized protein cannot perform its intended function. As an effective antibacterial agent, aminoglycoside antibiotics are one of the commonly used veterinary drugs in animal husbandry and aquaculture. In addition, they are often added to feed to promote animal growth and development. However, due to illegal or unreasonable use in the breeding process, excessive residues of aminoglycoside antibiotics in food have become one of the most concerned food safety issues. The main toxic side effects of such antibiotics are manifested in the impairment of hearing and kidneys. Therefore, many countries and institutions have established clear maximum residue limits for the residues of such drugs in food.

2. Structural characteristics and classification of aminoglycoside antibiotics

The aminoglycoside antibiotic has an aminocyclohexanol and one or more amino sugar molecules in the molecular structure, which are linked by a glycosidic bond. According to the chemical structure, antibacterial spectrum and resistance to passivation enzymes, these antibiotics can be divided into three generations. Representative drug and structural characteristics are shown in the table below.

Classification of Aminoglycoside antibiotics
Antibiotics Structural features Representative drugs
First generation Combination of fully carboxylated amino sugars and aminocyclitol Neomycin, Kanamycin, Streptomycin, Paromomycin
Second generation Containing deoxy amino sugar Gentamicin, Micronomicin, Fortimicin
Third generation Retains antibacterial activity, but has low ototoxicity and strong drug resistance Netilmicin, Amikacin, Astromicin

3. Method for detecting aminoglycoside antibiotics

The detection methods of aminoglycoside antibiotics are mainly divided into three categories: microbial method, immunoassay method and instrumental detection method. The respective principles and advantages and disadvantages are listed in the following table.

Comparison of detection method
Methods Principle Advantages Disadvantages
Microbial Compare the size of the inhibition zone Simple equipment, low price, suitable for the detection of a large number of samples Time consuming, poor stability, low accuracy, low sensitivity
Radioimmunoassay (RIA) Isotopically labeled and unlabeled antigens, competitively inhibited with antibodies Low reagent cost and high sensitivity Complex operation, radioactive contamination and short indate
Enzyme-linked immunosorbent assay (ELISA) Enzyme-labeled antigen/antibody, antigen-antibody reaction High sensitivity, strong specificity, wide application, easy operation, fast, low cost and strong field adaptability Poor repeatability, high cross-reaction rate, suitable for qualitative and semi-quantitative testing
Fluoroimmunoassay (FIA) Fluorescently labeled antigen/antibody, antigen-antibody reaction Need fluorescence microscope
Chemiluminescence immunoassay (CLIA) Luminescent substance labeling antigen/antibody, antigen-antibody reaction Working curve drifts with time
Gas chromatography (GC) Different partition coefficients of each component after pyrolysis after derivatization High sensitivity Need derivatization first
Liquid chromatography (LC) Different distribution coefficient High sensitivity Cannot pass UV detection directly
Capillary electrophoresis (CE) Take advantage of differences in migration rates and allocation behavior High separation efficiency, low sample consumption and short time Sensitivity is not high enough
Thin layer chromatography (TLC) Multiple adsorption-dissolution between the adsorbent and the extender Simple operation, wide applicability, fast and low cost The separation effect of biopolymer is not ideal

4. Product description

Product name QuaTest Aminoglycosides Rapid Test Kit

Principle This product utilizes the high affinity antibodies against gentamycin, neomycin, kanamycin and streptomycin antibiotics, which can easily identify these potential hazardous substances in milk without any instrument. 

a. Detection Limit (LOD) in Raw milk sample

Aminoglycosides MRL(μg/L)(EU/CO/US) LOD(μg/L)
Gentamycin 100/200/30 5-10
Neomycin 1500/500/150 4-6
Kanamycin 150/-/- 5-10
Streptomycin 200/-/- 20-40
Dihydrostreptomycin 200/200/125 20-40

b. Kit components

96test strips and 100pcs of micropipette tips

5. Contact Us

Just email to [email protected] / [email protected] for more information.

 

 

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