What is Salmonella antiserum?
What is Salmonella antiserum?
BD Difco Salmonella H Antisera are used in tube agglutination tests for the identification of Salmonella by flagellar (H) antigens. BD Difco Salmonella Vi Antiserum is used in slide agglutination tests for the identification of Salmonella Vi.
What are 3 likely antigens for Salmonella?
Salmonellae are Gram-negative, flagellated, facultatively anaerobic bacilli possessing three major antigens: H or flagellar antigen; O or somatic antigen; and Vi antigen (possessed by only a few serovars). H antigen may occur in either or both of two forms, called phase 1 and phase 2.
What is O antigen in Salmonella?
O-antigens are glycopolymers in lipopolysaccharides expressed on the cell surface of Gram-negative bacteria.
What is the structure of the O antigen in all Salmonella species?
Salmonella O antigens can be divided into two major groups: those which have N-acetylglucosamine (GlcNAc) or N-acetylgalactosamine (GalNAc) and those which have galactose (Gal) as the first sugar in the O unit.
What is a serotype of Salmonella?
Medical illustration of non-typhoidal Salmonella. Serotypes are groups within a single species of microorganisms, such as bacteria or viruses, which share distinctive surface structures.
What is Salmonella typhi O and H?
Salmonella typhi H and O titres greater than or equal to 1:160 occurred in respectively 82% and 58% of typhoid fever patients; only 4% of healthy individuals and 8% of non-typhoid patients had Widal titres greater than or equal to 1:80.
What is O antigen and H antigen in S typhi?
The bacteria’s surface are covered with lipopolysaccharide (LPS). The outermost portion of the LPS is the O antigen. Flagella are whip-like tails that bacteria use to move around. Flagella is the whole structure, while the slender threadlike portion of the flagella is called the H antigen.
What is H and O antigen?
What is the H antigen in blood?
The Hh blood group contains one antigen, the H antigen, which is found on virtually all RBCs and is the building block for the production of the antigens within the ABO blood group. (A transfusion of “normal” group O blood can trigger a severe transfusion reaction.)
What is the O antigen of LPS?
O-antigen. A repetitive glycan polymer contained within an LPS is referred to as the O antigen, O polysaccharide, or O side-chain of the bacteria. The O antigen is attached to the core oligosaccharide, and comprises the outermost domain of the LPS molecule. The composition of the O chain varies from strain to strain.
How do you write Salmonella serotype?
the correct way of writting is Salmonella (italics) followed by Typhimurium (T in upper case) or u can write as Salmonella enterica (all italics) followed by Typhimurium (T in upper case).
What is serotype and genotype?
As nouns the difference between serotype and genotype is that serotype is a group of microorganisms characterised by a specific set of antigens while genotype is genotype.
When to use BD Difco Salmonella H antisera?
BD Difco Salmonella H Antisera are used in tube agglutination tests for the identification of Salmonellaby flagellar (H) antigens. BD Difco Salmonella Vi Antiserum is used in slide agglutination tests for the identification of SalmonellaVi.
What are the different types of Salmonella antisera?
The SSI Salmonella antisera are intended for serological confirmation and serotyping of Salmonella. Our product range includes more than 200 different Salmonella antisera, which are divided into O group pool, O group, O fac- tor, H phase pool, H phase, H factor, H:R-phase and H phase inversion antisera.
What is the reaction time of Salmonella antisera?
Slide Agglutination. The slide agglutination test is done on a glass slide and read with the naked eye in front of a light source against a black background. Salmonella antisera from SSI Diagnostica have a quick reaction time and reaction can be read within 10 seconds.
What are the reagents for Salmonella h and VI?
REAGENTS BD Difco Salmonella O, H and Vi Antisera are lyophilized, polyclonal rabbit antisera containing approximately 0.2% sodium azide as a preservative. BD Difco Salmonella O Poly Antisera are polyvalent antisera. Each antiserum is specific for certain serogroup antigens.
