This was a serious problem in my country as well, pre-pasturisation.

There is no need for adults or weened children to be consuming the milk of cows anyway. People seem to have the idea the cows milk is some sort of essential item, its not.

spud

Human clinical bovine-type brucellosis not derived from milk
http://www.publichealthjrnl.com/article/S0033-3506%2883%2980087-0/abstract


Also:
Cobalt deficiency.

"Cobalt appears to have properties or characteristics unique to itself as a trace element, regardless of its indispensable role in vitamin B12 production. Cobalt contributes to resistance against parasites and infection, in concert with other trace elements such as copper, zinc and iron.

For example, as an integral ingredient in a multi-trace element formula, cobalt contributed to reversing incurable brucellosis infection in cattle, this according to Lady Eve Balfour (founder of the British Soil Association), in her article "9600 Miles in a Station Wagon, Some Findings by Agricultural Scientists" published in 1951. Back in 1940, Dr. Ira Allison, MD, utilized a multiple-trace mineral formula containing cobalt to treat 322 patients with the human variant of brucellosis, called undulant fever. All patients recovered, and three and a half years later, there was not one relapse.

In New Zealand, cattle and sheep around the Rotorrua tableland country, particularly sheep, did not thrive. The land was known as "cattle sick" country until a soil specialist discovered a cobalt deficiency in the soil. The land was treated with 2 ounces cobalt per acre, which quickly solved the problem.

Similarly, Russian sheep grazing on cobalt-deficient pastures showed severe lung infection, and when treated with cobalt, the result was a greatly reduced incidence of this bacterial infection. Cattle in Florida suffering from cobalt and copper deficiency were afflicted with chronic hookworm infestation, as published in the Journal of Dairy Science (74) back in 1937."

http://westonaprice.org/farm-a-ranch/465-cobalt-for-soil-and-animal-health?qh...