You searched for: Antigen-Antibody Tests

Antigen-antibody tests rely on the fact that there is a specific antibody for each antigen, and so each one can be used to detect the presence of the other. These tests are usually performed on serum, but occasionally samples of other body fluids, tissue, or stool may be used. Different models of antigen-antibody tests are available for the isolation and differentiation of various strains of infectious diseases. Superior testing kits deliver efficient detection of multiple antigens.

Lateral Flow test for Salmonella, Singlepath® Salmonella

Supplier: Merck

Most individuals infected with Salmonella develop diarrhea, fever, and abdominal cramps 12 to 72 H after infection. The illness usually lasts 4 to 7 days, and the majority of patients recover without treatment. However, in some cases, the diarrhea may be so severe that hospitalisation is required. Salmonella is a genus of rod-shaped, Gram-negative, non spore-forming, predominantly motile bacteria, belonging to the Enterobacteriaceae family. Salmonella spp. are one of the most common causes of food poisoning worldwide and have been isolated from most types of raw food (e.g. meats, eggs and plant products). Their high resistance to drying combined with a very high heat resistance once dried makes Salmonella a potential problem in most foods, particularly in dry and semi-dry products. Food legislation in many countries includes limits on Salmonella – typically absence in 25 g of food. Traditional microbiological methods for detection of Salmonella in food and animal feed require a total of up to five days to obtain a simple yes/no result. Innovative, rapid tests make screening for pathogenic organisms easier. The one-step format reduces the possibility of errors during handling.

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Lateral Flow test for Campylobacter, Singlepath® Campylobacter

Supplier: Merck

Campylobacteriosis is an infection caused by Campylobacter, most commonly C. jejuni. It produces an inflammatory, sometimes bloody, diarrhea or dysentery, including cramps, fever and abdominal pain. The debilitating neurological disorder, Guillain-Barre Syndrome (GBS), as well as reactive arthritis have also been associated with recent infections with certain C. jejuni strains. C. lari and the emerging pathogen, C. upsaliensis, have also been reported in a small percentage of cases of human Campylobacter infection. Campylobacter spp. are highly infectious - as few as 500 bacteria can cause illness. There is an increasing demand for Campylobacter testing in food to meet regulations regarding Campylobacter levels in poultry. The majority of Campylobacter spp. are relatively metabolically inactive, making identification based on biochemical characteristics difficult. Currently, the most commonly used techniques to test food products for Campylobacter are traditional methods based on culture media. Innovative, rapid tests make screening for pathogenic organisms easier. The one-step format reduces the possibility of errors during handling.

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Lateral Flow test for E. coli, Singlepath® E. coli O157 and Duopath® Verotoxins

Supplier: Merck

EHEC is capable of inducing life threatening illnesses, particularly in people with immune deficiency, young children and the elderly. Although the most common cause of EHEC is E. coli O157, other serotypes, such as O26, O45, O103, O111, O121 and O145, are also relatively frequent causes of infection. Typical symptoms are severe abdominal pain and diarrhoea, which is initially watery but often becomes bloody. E. coli are gram-negative, non sporulating, facultative anaerobic bacilli. Amongst the pathogenic E. coli, Verotoxin-forming strains (STEC or VTEC) have gained importance in recent years. The group of enterohaemorrhagic E. coli (EHEC) with its highly pathogenic serovar O157:H7 strain is particularly interesting in this respect. The main sources of infection are contaminated, raw or insufficiently heated foods of animal origin, such as meat and dairy products. The reservoir for EHEC is the gut of ruminants. Microorganisms can enter food during the processing of meat and dairy products if hygienic conditions are inadequate. The drastic increase in the incidence of food contamination caused by E. coli O157 demands reliable and rapid methods of detection. Innovative, rapid tests make screening for pathogenic organisms easier. Complete test sets for the detection of pathogens and toxins. The one-step format reduces the possibility of errors during handling. In addition to tests for the most common cause of infection, E. coli O157, there exits a 24-H screening protocol for VTEC, including E. coli O104:H4, based on Rapidcult™ E. coli enrichment combined with detection using Duopath® Verotoxins.

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Latex tests

Supplier: THERMO FISHER DIAGNOSTICS

Antigen-Antibody Tests, Streptex

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Bacterial antigen rapid latex agglutination test, Wellcogen™

Supplier: THERMO FISHER DIAGNOSTICS

Directly detect antigens present in human cerebrospinal fluid (CSF), serum, urine, or blood cultures using Thermo Scientific™ Wellcogen™ Bacterial Antigen Rapid Latex Agglutination Test.

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Latex tests

Supplier: LIOFILCHEM

Identification of the main pathogenic microorganisms directly from clinical specimens.

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Latex toxin detection kits, RPLA

Supplier: THERMO FISHER DIAGNOSTICS

The technique of reversed passive latex agglutination (RPLA) enables soluble antigen such as bacterial toxins to be detected in an agglutination assay. In a standard agglutination assay, soluble antibody reacts with particulate antigen such as bacterial cells. However, in a reversed agglutination assay the antibody, which is attached to particles, reacts with the soluble antigen. The particles (in this case, latex) do not themselves play a part in the reaction and they are therefore passive.

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Allergen lateral flow IIR

Supplier: HYSERVE

To detect allergen in highly processed foods by special extraction solution and unique antibody. This lateral-flow test is a high-performance qualitative assay.