Treponematosis in a pre-Columbian hunter-gatherer male from Antofagasta (1830 ± 20 BP, Northern Coast of Chile).

OBJECTIVE: This paper reports a new case of treponemal disease in a pre-Columbian hunter-gatherer inhabiting the desert coast of South America. MATERIALS: A well-preserved adult male skeleton from the "Vertedero Municipal" archaeological cemetery, located near the city of Antofagasta (Northern Chile). METHODS: The skeleton was radiocarbon dated, and isotopic analyses were performed to assess diet and mobility. Lytic and proliferative lesions identified were evaluated macroscopically and radiologically. RESULTS: A radiocarbon date of 1830 ± 20 BP and isotopic values indicating a marine diet and coastal residence were obtained. The cranium shows reactive changes as focal superficial cavitation, radial scarring and nodular cavitation, while the ribs, sternum, clavicles, and scapulae exhibit multiple lytic and proliferative lesions. The right femur has a node while both tibiae show mild anterior cortical thickening with a narrowed medullary cavity. CONCLUSIONS: Cranial lesions are pathognomonic for treponemal disease while postcranial changes are typical, and highly consistent with this pathology. SIGNIFICANCE: The type, morphology, and pattern of lesions make this case a good candidate for venereal syphilis. The case is relevant to the origin of venereal syphilis due to the lifestyle, temporal and ecological context of the individual. LIMITATIONS: Diagnosis of venereal syphilis is based on skeletal lesions; thus, it must be confirmed by molecular analysis. SUGGESTIONS FOR FURTHER RESEARCH: A comprehensive review of cases of pre-Columbian treponemal disease in South America as well as molecular studies are needed to confirm the presence of venereal syphilis in the New World before European contact.

Palaeopathological analysis of a Chilean gomphothere (Proboscidea: Gomphotheriidae).

OBJECTIVE: Re-evaluate the pathological lesions found on a gomphothere recovered from Quebrada Quereo (Late Pleistocene), Coquimbo region, Chile (31º55'41" S, 71º34'43" W, 20 masl). MATERIALS: 227 axial and appendicular specimens from a young adult male individual (SGO.PV.267). METHODS: Macroscopic and radiographic analysis. RESULTS: Pathological conditions identified included asymmetries of a cervical vertebra and of thoracic vertebra 16, degenerative joint disease in thoracic and lumbar vertebrae, possible evidence of neoplastic lesions within the bodies of three thoracic vertebrae (possibly hemangiomas), and fusion at thoracic vertebrae 15 and 16, suggesting the presence of spondyloarthropathy. CONCLUSIONS: The original diagnosis of traumatic lesions on this specimen is unsupported. The re-evaluation identified the presence of developmental defects, degenerative joint disease, possible neoplastic lesions, and spondyloartropathy. SIGNIFICANCE: The present analysis adds data to the sparse paleopathological record of South American gomphotheres. LIMITATIONS: Taphonomic alteration of some skeletal elements, as well as the presence of an incomplete individual, limits the ability to determine the etiology of some of the lesions identified. SUGGESTIONS FOR FURTHER RESEARCH: Researchers are encouraged to re-examine specimens curated in museums in order to identify pathological conditions that might have been overlooked or might benefit from re-evaluation.