Leptospira Hardjo Ab ELISA Kit (Bovine)


Bovine Leptospira hardjo ELISA kit is designed for the detection of antibodies against vital polysaccharide epitope of Leptospira hardjo using samples of bovine serum and milk. This assay has a quantitative and qualitative standard range.


Cattle are regarded as the predominant host reservoir for hardjo and there are two main types of pathogens of Leptospira hardjo for cattle, either interrogens serovar or pomona. The main source of infection arises from direct contact with contaminated urine or through products of abortion. Pomona is found to be more resistant to environmental conditions and also can be less host specific. In general, pomona is found to enter a herd through contaminated water or through infected cattle, whereas hardjo only enter as a result of infected cattle being introduced. ELISA assay take advantage of using monoclonal antibodies that have been standardised in order to effectively catch and detect the specific antigen. Furthermore, the specificity of the monoclonal antibodies which have been utilised in this assay have been specifically determined by the use of modified microscopic agglutination test (MAT). The following procedure is designed to undertake a rapid screening test in order to specifically detecting Leptospira hardjo antibodies which may be present in either milk or serum samples of infected cattle.


All reagents supplied need to be stored at 2 °C – 8 °C, unopened reagents will retain reactivity until expiration date. Do not use reagents beyond this date.

  • Microtiter Plate: Coated with monoclonal antibodies.
  • HRPO conjugated (100x Concentrated): Anti-bovine monoclonal antibody.
  • Conjugate Diluent.
  • Inactivated Positive Control (Freeze Dried).
  • Inactivated Negative Control (Freeze Dried).
  • Wash Solution (200x Concentrated).
  • ELISA Buffer.
  • Substrate Buffer A.
  • Substrate Buffer B.
  • Stop Solution.
  • Plastic Cover Seal.


The minimum sensitivity detection limit of antibodies against Leptospira hardjo polysaccharide epitope using current bovine Leptospira hardjo antibody ELISA kit is qualitative and quantitative. Please contact us for the protocol insert for more details.


– Bovine Leptospira Hardjo Antibody: ELISA
– Mean absorption value of the negative control should be ≤ 0.200 OD units (450 nm).
– Mean absorption value of the positive control provided should be ≥ 0.800 OD units (450 nm).
– High prevalence is more than 15% positive animals.


  1. Evaluation of an ELISA for the diagnosis of experimentally induced and naturally occurring Leptospira hardjo infections in cattle. Vet Microbiol. (1990) 21 (3): 255-62. Bercovich Z., et al.
  2. A review of laboratory techniques and their use in the diagnosis of Leptospira interrogans serovar hardjo infection in cattle. Aust Vet J. (1994) 71 (9): 290-4. Review. Smith C.R., et al.
  3. Development of an ELISA to detect antibodies to a protective lipopolysaccharide fraction of Leptospira borgpetersenii serovar hardjo in cattle. Vet Microbiol. (1999) 69 (3): 173-87. Yan K.T., et al.
  4. Leptospira hardjo serodiagnosis: a comparison of MAT, ELISA and Immunocomb. Vet Rec. (1997) 141 (23): 603-4. Woodward M.J., et al.
  5. Competitive enzyme-linked immunosorbent assay for detection of Leptospira interrogans serovar pomona antibodies in bovine sera. Clin Diagn Lab Immunol. (2001) 8 (1): 40-3. Surujballi O. and Mallory M.


  • Full Name: Leptospira hardjo Ab ELISA Kit (Bovine)
  • Reactivity: Bovine
  • Sample Type: Serum, Milk
  • Sensitivity: Qualitative, Quantitative



Your secretory IgA ELISA gave good results and I was also really impressed with how quickly we received it.

L. Johnston
PhD Student / University of Glasgow

It is refreshing to know that you have a technical team that is very knowledgeable. I have already recommended your company to other researchers in our department.

Dr. P. Anderson
Lecturer / University College London (UCL)

I am a first time user and found that your instruction manual was very easy to follow. The insulin ELISA assay performed well and I was happy with the results that were generated.

J. Thomas
Senior Technician / Addenbrooke’s Hospital

I carried out a pilot study comparing the performance of many ELISA assay's from different suppliers and found your kits to be one of the better performers. We observed good linearity and tight replicates.

Dr. C. Davies
Lead Scientists / AstraZeneca

You are my first point of contact when I am looking to purchase ELISA. You have such an easy and simple system, yet it is very effective.

A. Shaw
Purchasing / University of Oxford