Nigerian chimpanzees (Pan troglodytes vellerosus) at Gashaka: two years of habituation efforts.

Cross-population comparisons of chimpanzees can shed light on the pathways of hominid evolution. So far, no eco-ethological data exist for the recently recognized subspecies Pan troglodytes vellerosus. We report on the first 2 years of a new long-term study from what is perhaps their last remaining stronghold: the Gashaka Gumti National Park, Nigeria.

Correlation of CSF 5-HIAA concentration with sociality and the timing of emigration in free-ranging primates.

Objective: The purpose of this study was to examine the relationship between behavior and serotonin in nonhuman primates.

Method: During a routine capture and medical examination, 26 adolescent male rhesus macaques (Macaca mulatta) were selected as subjects from a free-ranging population of 4,500 rhesus monkeys inhabiting a 475-acre sea island. Blood samples (N = 23) and CSF samples (N = 22) were obtained, and each subject was fitted with a radio transmitter collar for rapid location.

Low CSF 5-HIAA concentrations and severe aggression and impaired impulse control in nonhuman primates.

Objective: The purpose of this study was to examine the relationship between behavior and serotonin by using a nonhuman primate model of aggression and impulse control.

Method: During a routine capture and medical examination, 26 adolescent male rhesus macaques (Macaca mulatta) were selected as subjects from a free-ranging population of 4,500 rhesus monkeys inhabiting a 475-acre sea island. Physiological data were obtained from 22-23 of the subjects.

Comparison of three culture media for isolation of Mycobacterium tuberculosis: a 6-year study.

Among 2,648 specimens positive on culture for Mycobacterium tuberculosis over a 6-year period, 82% grew on Lowenstein-Jensen medium (LJ), 79% on American Trudeau Society (ATS), and 56% on Middlebrook 7H10 (7H10). When these commercial culture media were compared in regard to the number of acid-fast bacilli seen on the original smears, LJ cultures were found to have the highest isolation rates for each smear category, and 7H10 had the lowest rates. Comparing the media from the aspect of number of mycobacterial colonies produced, LJ and ATS had the highest average colony counts, followed by 7H10.