Experimental Junin virus infection of a New World primate, Callithrix jacchus, was evaluated. The virus produced anorexia, loss of weight, thrombocytopenia, leukopenia, and hemorrhagic and neurological symptoms and terminated in death. Virus was recovered from urine, blood samples and all tissues taken at autopsy. These preliminary observations show that several aspects of the experimental disease in C. jacchus are quite similar to severe natural Argentine hemorrhagic fever of man.
ABSTRACT. The histology and the glycogen content of the vaginal epithelium was studied in 15 adult Alouatta caraya monkeys. The histological sections revealed a thin epithelium without cornification. The application of the PAS-amylase method showed absence of glycogen. The microbial flora of the vagina was examined in eight adult Alouatta earaya. The vaginal smears showed a mixed flora with a predominance of Gram+cocci. Haemolytic streptococci were found in 100 ~ of the tested monkeys. Other cocci, such as Staphylococcus albus, Streptococcusfaecalis and Microeoccus sp. were less frequent. Of the fecal organisms, Proteus sp. was the most frequently isolated. Neither ureaplasms nor any species of Lactobaeillus could be isolated. Positive cultures for nonpathogenic yeasts was a common feature. The relation between the absence of glycogen in the vaginal epithelium and the impossibility to isolate lactobaciUi is discussed.
Squirrel monkeys, colony‐born from Bolivian parents, were studied to establish the sequences and timing of eruption for deciduous and permanent teeth. Infants were born with a naked gingiva, and in only one monkey was di1 present at birth. The eruption of the lower deciduous teeth preceded their upper counterparts with the exception of di2, dc, and dpm2. No significant differences were found between the right and left quadrants of the mandible and maxilla. No significant sexual differences were found in the age of eruption. By the age of 14 weeks, all deciduous teeth had erupted. The sequence of eruption of the replacement teeth was different from that of milk teeth. The differences lie in the delayed eruption of canine teeth and in the inverted sequence, from the back to the front, of the premolar series. Significant sexual differences were found in total eruption (TE) for PM3 and I2 (P < 0.05) and highly significant differences (P < 0.01) in TE and initial eruption (IE) for C1, females being more precocious than males. The age at which monkeys completed dental eruption was highly variable, 103–119 weeks for males and 89–112 weeks for females. Differences were found when our results were compared with those of Long and Cooper [1968] for Colombian squirrel monkeys.
ABSTRACT. Eight specimens of Aotus from Argentina were studied. Their geographic distribution, pelage phenotype, diploid number, chromosome measurements and morphology and C-and G-banding patterns have been reported in the present work. Cytogenetic analysis with Giemsa showed 2N = 50 in the females and 2N = 49 in a male. C-and G-banding patterns differed from those published for owl monkeys from other geographic regions.
ABSTRACT. The microscopic structure of the Alouatta caraya ovary is studied in different ages and reproductive stages. The most significant feature seems to be the presence in adult ovaries of abundant glandular interstitial tissue which occupies both the cortex and medulla. It seems to be derived from the theca interna of atretic follicles. Discrete luteinized masses are present in the medulla in all the ovaries observed. Invaginations of the surface epithelium are seen only in infant and juvenile ovaries. The development of cystic follicles seems to be a common pathway of atresia.
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