The Role of Superficial Lymph Nodes of Cattle in the Diagnosis of Infectious Diseases

Abstract

The superficial lymph nodes of cattle represent important diagnostic markers for the early detection and monitoring of infectious diseases. The lymphatic system is functionally linked to both innate and acquired immunity and constitutes the first barrier upon pathogen entry into the organism. Palpation, visual assessment, and continuous monitoring of superficial lymph nodes-such as the submandibular, supramammary, and others-often provide valuable information regarding the localization, generalization, and intensity of infectious processes.

In diseases caused by infectious agents, including bacteria, viruses, and parasites, lymph nodes exhibit early reactive changes such as hyperplasia, inflammation, swelling, and pain. Evaluation of lymph nodes is particularly important in the diagnosis of tuberculosis and listeriosis, where local lymphadenitis represents one of the earliest clinical signs. In addition, superficial lymph nodes play a significant role in assessing the epizootic situation, as their pathological changes may indicate the spread of infection throughout an entire farm.

Clinical assessment of lymph nodes is recommended in combination with additional diagnostic methods, including serological tests, bacteriological examinations, and molecular studies.