There is a theory that Marat had Tuberculous cervical lymphadenitis.
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Four of the total five patients had severe pharyngitis and submandibular lymphadenitis and had consumed raw camel liver.
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An infection of the lymph vessels is known as lymphangitis, and infection of a lymph node is known as lymphadenitis.
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Goats can become infected with various viral and bacterial diseases such as foot-and-mouth disease, caprine arthritis encephalitis, caseous lymphadenitis, pinkeye, mastitis, and pseudorabies.
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More examples
Inflammation of lymph nodes
Lymphadenopathy is a term meaning "disease of the lymph nodes." It is, however, almost synonymously used with "swollen/enlarged lymph nodes". It could be due to infection, auto-immune disease, or malignancy.
An acute infection of one or more lymph nodes. Ref: Beers, M. H., R. S. Porter, T. V. Jones, J. L. Kaplan, M. Berkwits, eds. 2006.The Merck manual of diagnosis and therapy. 18th ed. Whitehouse Station, NJ: Merck Research Laboratories.