1. By means of a single large dose of poliomyelitis virus, distributed at a number of intradermal sites, active immunity has been produced in Macacus rhesus monkeys, as shown by skin neutralization and intracisternal tests. 2. In the small series (four animals) of monkeys so treated, neither abortive nor paralytic signs of experimental poliomyelitis appeared.

The advent of autoradiography has made it possible to add information on cellular dynamics to histologic observations of morphologic details reported in previous studies.1Condylar growth has been studied extensively in rodents by autoradiographic technics.';-' Since the temporomandibular joint and masticatory function in the rhesus monkey more clearly resemble the human situation, cellular dyna...

Metacognition is the ability to think about thinking. Although monitoring and controlling one's knowledge is a key feature of human cognition, its evolutionary origins are debated. In the current study, we examined whether rhesus monkeys (Macaca mulatta; N = 120) could make metacognitive inferences in a one-shot decision. Each monkey experienced one of four conditions, observing a human appeari...

During a study of experimental measles in rhesus monkeys the available literature was consulted for the normal figures of total and differential white cell counts in these animals. It was found that the results reported by 11 different authors (table I) varied within a wide range. The differential count was always mentioned in percentages which either gives no idea of the absolute numbers, or c...

Rhesus monkeys are protected from disease when a recombinant vesicular stomatitis virus-based vaccine is administered 20-30 min after infection with Marburg virus. We protected 5/6 monkeys when this vaccine was given 24 h after challenge; 2/6 animals were protected when the vaccine was administered 48 h postinfection.

Noroviruses are a leading viral cause of acute gastroenteritis among humans. During the 2014-15 epidemic season, norovirus GII.17 was detected in rhesus monkeys in China. Genetic, structural, and challenge studies revealed virus mutations and verified the infections. Thus, cross-species transmission may occur, and monkeys may be a virus reservoir.