Cribra orbitalia in two temporally disjunct population samples from the Dakhleh Oasis, Egypt

Abstract

Cribra orbitalia (CO), an osseous sign of anemic stress, occurs in 67% (n = 296) of the pre-Roman (n = 153) and Roman (n = 143) period crania from the Dakhleh Oasis, Egypt. CO is primarily a childhood condition in these samples, and its prevalence is significantly higher in virtually all cohorts in the pre-Roman group, including among females, who display higher rates of active lesions. This temporal trend suggests that the underlying causative factors (i.e., synergism between disease and nutrition) were less pervasive in the Roman period. In both population samples, anemic stress develops in some perinates prior to the expected minimum age for the development of iron deficiency anemia. This suggests additional causes of anemic stress in the Dakhleh population. A strong candidate is folic acid deficiency and its concomitant, megaloblastic anemia, which results from weaning of infants on goat's milk, a known practice in ancient Egypt. The putative incorporation of other food items in the weanling diet, particularly honey, a confirmed source of C. botulinum, represents yet another retrospective data source to help understand the epidemiological profile of cribra orbitalia in this population. Comparative data from other Egyptian populations, though limited, show similar patterns, however, they display a lower prevalence than the data from Dakhleh.

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