Word: infection
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...louse feeds on human blood and abhors soap. But where there is no cleansing disturbance the louse flourishes&151;the female easily produces over 100 mature offspring in two months. Typhus epidemics begin when lice suck up typhus germs with the blood of infected human beings, carry the germs to others and infect them. The lice themselves eventually die of the disease they carry&151;after they have spread it among...
...typhus germ is called Rickettsia prowazeki, after Typhus Researchers Howard Taylor Ricketts and Stanislaus Prowazek. In feeding, the infected louse bows its head, pricks the skin with sharp stylets for bloodsucking, and meanwhile often excretes Rickettsiae on to the skin. When a victim scratches his itching louse bite, he is apt to infect himself by rubbing Rickettsiae into the scratch...
Undulant fever may smolder for years, suddenly flare up into a complex disease resembling typhoid, malaria or tuberculosis. It is caused by any of three germs of the group Brucella (named after Sir David Bruce, who discovered the strain in 1886). Brucellae infect cattle, sheep, goats and pigs, cause a disease known as contagious abortion. Between 11 and 20% of all U.S. cattle are infected, causing a yearly loss to farmers of some $80,000,000. The disease is transmitted to man through milk, butter, cheese, and through handling of infected carcasses; it is not passed from one person...
...Strains of bacteriophage are found in the human intestinal tract, in urine, pus, blood and sewage. About 25 years ago, bacteriophage was first isolated by a British scientist from a dead germ colony. The mysterious substance that killed the bacteria was able to pass through a fine filter and infect other colonies. Some doctors soon dreamed of it as a universal panacea. (Sinclair Lewis dramatized this hope in his novel Arrowsmith.) Compared to the early days, the claims last week seemed conservative...
...most intensive disease-spreading was under way last week in Maryland, where it is subsidized with State funds and helped by the U.S. Department of Agriculture. This week a similar campaign begins in New Jersey, where the first few spores were sown in 1939. The method is to heavily infect two half-acre plots of turf (where grubs thrive best) in each square mile. Birds, breezes and flying beetles then complete spreading the disease. Purpose of spore-sowing is not, as in spraying, to kill beetles on a specific plot but to establish the beetle enemy widely. Spore powder...