Open Access
Research (Published online: 21-11-2022)
17. Preparation and evaluation of a lateral flow immunochromatographic nanogold diagnostic kit for brucellosis in sheep
Zainab Mohammed Aboelqassem, Hazem Mohammed Ibrahim, Rafik Hamed Sayed, Hassan Mohamed Sobhy, and Sahar Hussein Abdalla Hekal
Veterinary World, 15(11): 2658-2664

Zainab Mohammed Aboelqassem: General Organization for Veterinary Services (GOVS), Naddi Alsaeed St. Dokki, Giza Governorate, Giza, Egypt.
Hazem Mohammed Ibrahim: Veterinary Serum and Vaccine Research Institute, Agricultural Research Center, Giza, Egypt.
Rafik Hamed Sayed: Central Laboratory for evaluation of Veterinary Biologics, Agricultural Research Center, Giza, Egypt.
Hassan Mohamed Sobhy: Department of Natural Resources, Faculty of African Postgraduate Studies, Cairo University, Giza, Egypt.
Sahar Hussein Abdalla Hekal: Department of Natural Resources, Faculty of African Postgraduate Studies, Cairo University, Giza, Egypt.

doi: www.doi.org/10.14202/vetworld.2022.2658-2664

Share this article on [Facebook] [LinkedIn]

Article history: Received: 14-06-2022, Accepted: 11-10-2022, Published online: 21-11-2022

Corresponding author: Sahar Hussein Abdalla Hekal

E-mail: saharhekal@cu.edu.eg

Citation: Aboelqassem ZM, Ibrahim HM, Sayed RH, Sobhy HM, and Hekal SHA (2022) Preparation and evaluation of a lateral flow immunochromatographic nanogold diagnostic kit for brucellosis in sheep. Veterinary World, 15(11): 2658–2664.
Abstract

Background and Aim: Brucellosis is a zoonotic disease with a worldwide distribution. It has a serious impact on the health of humans and animals, along with a negative impact on the economy. This study aimed to prepare and evaluate the diagnostic performance of a lateral flow immunochromatographic test (LFIT) nanogold diagnostic kit for detecting brucellosis in sheep.

Materials and Methods: A rapidly developed LFIT, in which lipopolysaccharide conjugates with nanogold molecules, was placed on the conjugate pad. One hundred ovine serum samples were tested to detect Brucella antibodies (Ab) using the prepared lateral flow immunochromatography assay (LFA) kit and Rose Bengal test. The evaluation of specificity, sensitivity, and accuracy for LFIT and Rose Bengal plate test was conducted using the P04310-10 IDEXX brucellosis ovine/ caprine Ab enzyme-linked immunosorbent assay (ELISA) test (gold standard).

Results: The lower amount of Brucella Ab in the ovine serum samples was detected and was 1.58 S/P ratio ELISA titer/100 μL using LFIT and with Rose Bengal to detect 1.86 S/P ratio ELISA. The results showed that the developed LFIT had high specificity with no cross-reactivity with other tested bacteria. The calculated sensitivity, specificity, and accuracy of LFIT and Rose Bengal test using the P04310-10 IDEXX brucellosis ovine/caprine Ab ELISA test (gold standard) were 74% and 89%, 81% and 59%, and 76.9% and 66%, respectively.

Conclusion: The present results showed interesting results implying that the LFIA strip test could be used as a substantial diagnostic tool for field screening ovine Brucella as an essential step in the control of brucellosis. However, further studies for the validation of the present findings are necessary.

Keywords: brucellosis, diagnosis, enzyme-linked immunosorbent assay, lateral flow assay, lateral flow immunochromatographic test, Rose Bengal plate test.