scholarly journals Preparation of Listerin antigen as a tool for Diagnosis of listeriosis

2004 ◽  
Vol 28 (1) ◽  
pp. 43-54
Author(s):  
G. M. Al - Khatib ◽  
Zainab A.A. Al - Haddad ◽  
Sanaria Fawzi Al- Hissen ◽  
Sahar Hassan Al- Kutbi
Keyword(s):  
Skin Test ◽  
Guinea Pigs ◽  
Skin Testing ◽  
Specific Antigen ◽  
Water Soluble ◽  
Skin Tests ◽  
Test Results ◽  
Soluble Extract ◽  
Water Soluble Extract

 This study was conducted to produce a specific antigen for detection L. monocytogenes infection. The antigen was prepared by culturing L. monocytogenes on suitable media and then disrupted by ultrasonicatorwaves.  The water – soluble extract of sonically disrupted Listeria were used for skin testing guinea pigs infected with (1*108 CFU / ml) of a L. monocytogenes. Two infected doses were used for immunization at intervals of (10) days between them.  Two skin tests were done, 10 days and 15 days after the 2nd infected dose. The skin test results were read after 24 & 48 hrs. which showed clear thickening differences and redness at the injection sites after 24 hrs. and become more clear after 48 hrs.

scholarly journals Use of Mycobacterium tuberculosisComplex-Specific Antigen Cocktails for a Skin Test Specific for Tuberculosis

1998 ◽  
Vol 66 (8) ◽  
pp. 3606-3610 ◽  
Author(s):  
Konstantin Lyashchenko ◽  
Claudia Manca ◽  
Roberto Colangeli ◽  
Anna Heijbel ◽  
Alan Williams ◽  
...  
Keyword(s):  
Tuberculin Skin Test ◽  
Skin Test ◽  
Guinea Pigs ◽  
Nontuberculous Mycobacteria ◽  
Skin Testing ◽  
Specific Antigen ◽  
Diagnostic Value ◽  
Mycobacterial Species ◽  
Diagnostic Specificity ◽  
Single Antigen

ABSTRACT The tuberculin skin test currently used to diagnose infection withMycobacterium tuberculosis has poor diagnostic value, especially in geographic areas where the prevalence of tuberculosis is low or where the environmental burden of saprophytic, nontuberculous mycobacteria is high. Inaccuracy of the tuberculin skin test often reflects a low diagnostic specificity due to the presence in tuberculin of antigens shared by many mycobacterial species. Thus, a skin test specific for tuberculosis requires the development of new tuberculins consisting of antigens specific to M. tuberculosis. We have formulated cocktails of two to eight antigens of M. tuberculosis purified from recombinant Escherichia coli. Multiantigen cocktails were evaluated by skin testing guinea pigs sensitized with M. bovis BCG. Reactivity of multiantigen cocktails was greater than that of any single antigen. Cocktail activity increased with the number of antigens in the cocktail even when the same amount of total protein was used for cocktails and for each single antigen. A cocktail of four purified antigens specific for the M. tuberculosis complex elicited skin test responses only in BCG-immunized guinea pigs, not in control animals immunized with M. avium. These findings open the way to designing a multiantigen formulation for a skin test specific for tuberculosis.

Skin Tests in the Diagnosis of Allergic Conditions

1981 ◽  
Vol 2 (10) ◽  
pp. 327-332
Author(s):  
Lillian P. Kravis
Keyword(s):  
Skin Test ◽  
Skin Testing ◽  
Clinical History ◽  
Skin Tests ◽  
Food Allergies ◽  
Type I ◽  
Test Results ◽  
Type Iv ◽  
Transfer Testing ◽  
Allergic Disorders

Allergic disorders may be classified into four main categories of immunologic hypersensitivity reactions: type I, immediate or anaphylactic; type II, cytotoxic; type III, involving immune complexes; and type IV, delayed or cell mediated. Type I reactions are those most commonly encountered in clinical allergy. They may be well defined by skin testing, provided the patients to be tested are carefully selected and the tests are applied properly and interpreted critically. Major indications for direct skin testing are: (1) to separate atopic from nonatopic patients; (2) to help in identifying specific allergens in atopic persons; and (3) to reassess the allergic profile in patients receiving immunotherapy. Other indications for skin-testing, of more limited applicability, include: (1) screening for hypersensitivity to vaccines; (2) testing for reactivity to drugs (and particularly penicillin); (3) testing for immediate and delayed reactions in such conditions as bronchopulmonary aspergillosis; and (4) in evaluation of patients with reactions to insect stings. Skin-testing has limited usefulness in early infancy, in chronic urticaria, in the investigation of food allergies, in atopic dermatitis not accompanied by other manifestations of atopy, or in allergic reactions to drugs other than penicillin. A checklist to be consulted prior to performing or interpreting skin tests should include: (1) assurance of the potency of the extract used in testing; (2) knowledge of the nonspecific irritant properties of any extracts used for testing; (3) history of administration of antihistamine drugs or epinephrine prior to testing; and (4) the correlation of skin test results with clinical history. The help of a qualified allergist should be sought if: (1) skin test results are at variance with the historical data; or (2) systemic reactions are induced by skin testing; or (3) the patient fails to respond to the therapy dictated by the skin test results. Alternatives or supplements to skin-testing include RAST testing and measurement of histamine release from sensitized leukocytes. These have rendered passive transfer testing (PK or Prausnitz-Küstner) substantially obsolete. Direct allergy skin testing remains the most sensitive, most specific, and most reliable method presently available to the physician for investigation of IgE-mediated allergic disorders.

scholarly journals Inverse association between positive tuberculin tests and positive allergy skin tests in children

2009 ◽  
Vol 49 (1) ◽  
pp. 7
Author(s):  
Nur Rochmah ◽  
Dyahris Kuntartiwi ◽  
Anang Endaryanto ◽  
Aryanto Harsono
Keyword(s):  
Skin Test ◽  
Skin Testing ◽  
Tuberculin Test ◽  
Skin Tests ◽  
Food Allergies ◽  
Inverse Association ◽  
Test Results ◽  
Cross Sectional ◽  
Allergy Test ◽  
Mite Allergy

Background  The  association between  Mycobacterium  tuberculosisinfection  and  atopy remains controversial. Reaction to tuberculosisinfection  is  mediated  by  Th-1  immune responses whereas allergicreactions are mediated  by  Th- 2 immune response. In patients withatopic syndrome who also suffer from tuberculosis infection,  theTh-2  response will be suppressed  and  allergy manifestations willdecrease. Therefore, it  is  important to determine the appropriateallergy test and to predict outcome after completing tuberculosistreatment.Objective  To  evaluate the influence  of  a positive tuberculin teston  skin test results in diagnosing atopic disease.Methods  A cross sectional study was  conducted  in  the  pediatricallergy  outpatient  clinic, Soetomo Hospital, Surabaya, Indonesiabetween 2004  and  2007. Eighty-five patients were enrolled inthis study.  The  tuberculin test was performed  on  all patientswith allergy.  The  allergy test was carried  out  by  performing a skinscratch test.Results  There  was a weak inverse correlation between positivetuberculin tests and positive allergy skin tests in children (housedust  mite, food  and  pet  allergies).  The  correlation between apositive  tuberculin  test  and  house  dust  mite allergy test wasr:  -0.364  (P=O.OOl;  a=O.Ol).  The  correlation  between  thetuberculin  test  and  food allergies was  r:  -0.420  (P=O.OOl;a=O.Ol).  The  correlation between the tuberculin test  and  petallergies was  r:  -0.344  (P=  0.001;  a=O.Ol).Conclusions  A positive tuberculin test  is  weakly correlated withpositive allergy skin test results, suggesting  that  it  is  appropriate  todo allergy skin testing even in children with a positive tuberculintest.

scholarly journals Antimicrobial Activity Jangjingki (Oxalis corniculata L.) Against The Growth Of Staphylococcus Aureus, Escherichia Coli, and Candida Albicans

2021 ◽  
Vol 4 (1) ◽  
pp. 1-11
Author(s):  
Misrahanum Misrahanum ◽  
Syarifah Dhea Almunawwarah ◽  
Hira Helwati ◽  
Hilda Maysarah ◽  
Sadli Sadli
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Methanol Extract ◽  
Water Soluble ◽  
Test Results ◽  
Soluble Extract ◽  
E Coli ◽  
Activity Test ◽  
Water Soluble Extract

Jangjingki (Oxalis corniculata L.) is a plant from Oxalidaceae that has potential as a natural antimicrobial agent. The purpose of this research is to see the antimicrobial activity of methanol extract of jangjingki against the growth of Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, and Candida albicans ATCC 10231. The thick extract of jangjingki was obtained by the maceration method with methanol solvent. At the same time, the antimicrobial activity test on S. aureus and E. Coli bacteria was carried out using the hole diffusion method. The simplicia characterization showed 7.17% water, 9.68% of total ash, 11.67% water-soluble extract, and 9.17% of the ethanol-soluble section. At the same time, the methanol extract of jangjingki characterization showed 22.5% of water, 10.16% of total ash, 55.83% water-soluble extract, and 62.91% of the ethanol-soluble section. Phytochemical test results showed that the methanol extract of jangjingki contains alkaloids, saponins, flavonoids, tannins, and steroids. The results of the antimicrobial activity test with variations in the concentration of jangjingki methanol extract 15, 20, 30, and 40% on S. aureus and E. Coli bacteria showed growth inhibition activity of these two bacteria, the largest diameter of the inhibition zone was formed when the extract was given a concentration of 40% with a diameter of the area. Resistance of 8,07 mm and 11 mm, respectively. Meanwhile, the test results of inhibition of growth of the fungus C. Albicans by presenting variations in the concentration of jangjingki methanol extract of 5, 10, 15, and 20% could not inhibit the growth fungus C. Albicans.

Prebiotic frozen dessert processed with water‐soluble extract of rice byproduct: Vegan and nonvegan consumers perception using preferred attribute elicitation methodology and acceptance

2021 ◽  
Vol 86 (2) ◽  
pp. 523-530
Author(s):  
Jiuliane Martins da Silva ◽  
Carlos Eduardo Barão ◽  
Erick Almeida Esmerino ◽  
Adriano Gomes Cruz ◽  
Tatiana Colombo Pimentel
Keyword(s):  
Water Soluble ◽  
Soluble Extract ◽  
Frozen Dessert ◽  
Water Soluble Extract

Activation of Selective Transcription Factors and Cytokines by Water-Soluble Extract from Lentinus lepideus

2003 ◽  
Vol 228 (6) ◽  
pp. 749-758 ◽  
Author(s):  
Mirim Jin ◽  
Hyung Jin Jung ◽  
Jeong June Choi ◽  
Hyang Jeon ◽  
Jin Hwan Oh ◽  
...  
Keyword(s):  
Mononuclear Cells ◽  
Human Peripheral Blood ◽  
Post Treatment ◽  
Water Soluble ◽  
Dependent Manner ◽  
Soluble Extract ◽  
Transient Transfection Assay ◽  
Gm Csf ◽  
Tnf Α ◽  
Water Soluble Extract

We isolated a water-soluble extract, PG101, from cultured mycelia of Lentinus lepideus. Treatment of human peripheral blood mononuclear cells (PBMCs) with PG101 increased levels of TNF-α, IL-1β, IL-10, and IL-12 by 100- to 1000-fold, whereas GM-CSF and IL-18 were activated by an order of magnitude. On the contrary, IFN-γ and IL-4 were not affected. The response to PG101 occurred in a dose- and time-dependent manner. From the human PBMCs treated with PG101, TNF-α was a first cytokine to be activated, detectable at 2 hr post-treatment followed by IL-1β at 6 hr post-treatment. IL-12 and IL-10 were the next to follow. GM-CSF and IL-18 both showed significant increases 24 hr after treatment. When PBMCs were sorted into various cell types, monocyte/macrophages, but not T and B cells, were the major target cell type responsive to PG101. Consistent with this result, the profile of cytokine expression upon PG101 treatment was comparable between PBMCs and a human promonocytic cell line (U937), whereas cell lines of T cell and myeloid origins did not respond to PG101. Data from a transient transfection assay involving specific reporter plasmids indicated that cellular transcription factor such as NF-κB, but not AP-1, was highly activated by PG101. Results from a gel retardation assay and the experiment involving a specific NF-κB inhibitor confirmed the involvement of NF-κB. Despite its significant biological effect on various cytokines, PG101 remained nontoxic in both rats and PBMCs even at a biological concentration approximately 20 times greater. PG101 demonstrates great potential as a therapeutic immune modulator.

Controversial Techniques in Allergy

PEDIATRICS ◽  
1988 ◽  
Vol 82 (6) ◽  
pp. 935-937
Author(s):  
GAIL G. SHAPIRO ◽  
JOHN A. ANDERSON
Keyword(s):  
Respiratory Tract ◽  
Physical Examination ◽  
Skin Test ◽  
Skin Testing ◽  
Skin Tests ◽  
Sensitive Test ◽  
Financial Gain ◽  
Specific Antigens ◽  
Laboratory Procedures ◽  
Allergy Skin Testing

Ten years ago a commentary appeared in Pediatrics entitled "Allergy Skin Testing: Science or Quackery?"1 This statement was a rejoinder to a commentary in Pediatrics in 19752 that included allergy skin testing in a list of laboratory procedures that are abused for financial gain. The gist of the reply was that allergy skin tests themselves were not the problem because they were valid bioassays for IgE antibody to specific antigens. Abuse and quackery set in when numerous, indiscriminately chosen skin tests were performed instead of an appropriate history, physical examination, and carefully selected tests based on that evaluation. The allergy skin test was at that time and remains today the most sensitive test for specific allergic antibody in the skin, its presence there reflecting its presence in the blood and respiratory tract.

The Hymenoptera venom study II: Skin test results and safety of venom skin testing

1989 ◽  
Vol 84 (6) ◽  
pp. 967-974 ◽  
Author(s):  
R LOCKEY ◽  
P TURKELTAUB ◽  
C OLIVE ◽  
I BAIRDWARREN ◽  
E OLIVE ◽  
...  
Keyword(s):  
Skin Test ◽  
Skin Testing ◽  
Test Results ◽  
Hymenoptera Venom
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