Environmental factors and hygiene behaviors associated with facial cleanliness and trachoma in Kongwa, Tanzania

Background Having a clean face is protective against trachoma. In the past, long distances to water were associated with unclean faces and increased trachoma. Other environmental factors have not been extensively explored. We need improved clarity on the environmental factors associated with facial cleanliness and trachoma prevalence, especially when the disease burden is low. Methodology/Principle findings A cross-sectional survey focusing on household environments was conducted in all 92 villages in Kongwa, Tanzania, in a random selection of 1798 households. Children aged 0–5 years in these households were examined for facial cleanliness. In each of the 50 randomly-selected villages, 50 children aged 1–9 years were randomly selected and examined for trachoma. In a multivariate model adjusting for child age, we found that children were more likely to have clean faces if the house had a clean yard (OR 1.62, 95% CI 1.37–1.91), an improved latrine (OR 1.11, 95% CI 1.01–1.22), and greater water storage capacity (OR 1.02, 95% CI 1.00–1.04), and if there were clothes washed and drying around the house (OR 1.30, 95% CI 1.09–1.54). However, measures of crowding, wealth, time spent on obtaining water, or the availability of piped water was not associated with clean faces. Using a cleanliness index (clean yard, improved latrine, washing clothes, ≥1 child in the household having a clean face), the community prevalence of trachoma decreased with an increase in the average value of the index (OR 2.28, 95% CI 1.17–4.80). Conclusions/Significance Access to water is no longer a significant limiting factor in children’s facial cleanliness in Kongwa. Instead, water storage capacity and the way that water is utilized are more important in facial cleanliness. A household cleanliness index with a holistic measure of household environment is associated with reduced community prevalence of trachoma.

Cascade Regression-Based Face Frontalization for Dynamic Facial Expression Analysis

Facial expression recognition has seen rapid development in recent years due to its wide range of applications such as human–computer interaction, health care, and social robots. Although significant progress has been made in this field, it is still challenging to recognize facial expressions with occlusions and large head-poses. To address these issues, this paper presents a cascade regression-based face frontalization (CRFF) method, which aims to immediately reconstruct a clean, frontal and expression-aware face given an in-the-wild facial image. In the first stage, a frontal facial shape is predicted by developing a cascade regression model to learn the pairwise spatial relation between non-frontal face-shape and its frontal counterpart. Unlike most existing shape prediction methods that used single-step regression, the cascade model is a multi-step regressor that gradually aligns non-frontal shape to its frontal view. We employ several different regressors and make a ensemble decision to boost prediction performance. For facial texture reconstruction, active appearance model instantiation is employed to warp the input face to the predicted frontal shape and generate a clean face. To remove occlusions, we train this generative model on manually selected clean-face sets, which ensures generating a clean face as output regardless of whether the input face involves occlusions or not. Unlike the existing face reconstruction methods that are computational expensive, the proposed method works in real time, so it is suitable for dynamic analysis of facial expression. The experimental validation shows that the ensembling cascade model has improved frontal shape prediction accuracy for an average of 5% and the proposed method has achieved superior performance on both static and dynamic recognition of facial expressions over the state-of-the-art approaches. The experimental results demonstrate that the proposed method has achieved expression-preserving frontalization, de-occlusion and has improved performance of facial expression recognition.

“We Cubans Are Obligated Like Cats to Have a Clean Face”: Malaria, Quarantine, and Race in Neocolonial Cuba, 1898-1940

In a paper presented to the Academy of Medical, Physical and Natural Sciences of Havana on December 14, 1923, Dr. Jorge LeRoy y Cassá identified the “unsanitary immigration” to Cuba of Haitians and British West Indians as his country's most pressing health problem. “Those undesirable elements,” he contended, had introduced malaria, smallpox, typhoid fever, and intestinal parasites into eastern Cuba, maladies which then spread to the rest of the island. Through their “vices,” “violent crimes,” and “nefarious practices of brujerí;a [witchcraft],” in fact, Afro-Caribbean immigrants constituted a “double threat”—moral as well as physical—to the health of the Cuban nation. Somewhat surprisingly, the man who was later hailed as the “Father of Cuban Sanitary Statistics” mustered no direct evidence to support his condemnation of West Indian immigration on medical grounds. But such proof was hardly necessary for his esteemed audience. Although the medical doctors and public health officials assembled before LeRoy y Cassa at the Academy of Sciences may have differed on the issue of prohibiting.

“We Cubans Are Obligated Like Cats to Have a Clean Face”: Malaria, Quarantine, and Race in Neocolonial Cuba, 1898-1940

In a paper presented to the Academy of Medical, Physical and Natural Sciences of Havana on December 14, 1923, Dr. Jorge LeRoy y Cassá identified the “unsanitary immigration” to Cuba of Haitians and British West Indians as his country's most pressing health problem. “Those undesirable elements,” he contended, had introduced malaria, smallpox, typhoid fever, and intestinal parasites into eastern Cuba, maladies which then spread to the rest of the island. Through their “vices,” “violent crimes,” and “nefarious practices of brujerí;a [witchcraft],” in fact, Afro-Caribbean immigrants constituted a “double threat”—moral as well as physical—to the health of the Cuban nation. Somewhat surprisingly, the man who was later hailed as the “Father of Cuban Sanitary Statistics” mustered no direct evidence to support his condemnation of West Indian immigration on medical grounds. But such proof was hardly necessary for his esteemed audience. Although the medical doctors and public health officials assembled before LeRoy y Cassa at the Academy of Sciences may have differed on the issue of prohibiting.