Cryptosporidium Infection Risk: Results of New Dose‐Response Modeling

Cryptosporidium human dose‐response data from seven species/isolates are used to investigate six models of varying complexity that estimate infection probability as a function of dose. Previous models attempt to explicitly account for virulence differences among C. parvum isolates, using three or six species/isolates. Four (two new) models assume species/isolate differences are insignificant and three of these (all but exponential) allow for variable human susceptibility. These three human‐focused models (fractional Poisson, exponential with immunity and beta‐Poisson) are relatively simple yet fit the data significantly better than the more complex isolate‐focused models. Among these three, the one‐parameter fractional Poisson model is the simplest but assumes that all Cryptosporidium oocysts used in the studies were capable of initiating infection. The exponential with immunity model does not require such an assumption and includes the fractional Poisson as a special case. The fractional Poisson model is an upper bound of the exponential with immunity model and applies when all oocysts are capable of initiating infection. The beta Poisson model does not allow an immune human subpopulation; thus infection probability approaches 100% as dose becomes huge. All three of these models predict significantly (>10x) greater risk at the low doses that consumers might receive if exposed through drinking water or other environmental exposure (e.g., 72% vs. 4% infection probability for a one oocyst dose) than previously predicted. This new insight into Cryptosporidium risk suggests additional inactivation and removal via treatment may be needed to meet any specified risk target, such as a suggested 10^?4 annual risk of Cryptosporidium infection.     

Poetics of cartography: globalism and the “oil enclave” in Ibiwari Ikiriko’s Oily Tears of the Delta

This paper examines the ways in which ideas and discourses generated by global phenomena (such as the Oil Encounter) travel and get reframed in local topographies. It asks how one might reposition hermeneutics appropriate to a particular context without falling into the trap of an epistemology that is purportedly global but representing other interests? The environment in which crude oil is extracted has been termed heterogeneous and international. Amitav Ghosh describes it as one that is “lacking in a sense of place,” while James Ferguson considers it an “insular and socially thin neoliberal landscape of deregulated enterprises.” This paper goes against the grain by challenging the formations that undergird some of these assumptions. It takes the Niger Delta as a landscape in which quotidian life and the oil infrastructure are intimately intertwined and asks what insights might literary depictions of this context give about the form of globalism that operates within the industrial complex through which oil is extracted. Reading Ibiwari Ikiriko’s poetry collection Oily Tears of the Delta, the paper reflects on how the text stages a dialogue with the global by addressing itself to the oil infrastructure in that environment. It discusses Ikiriko’s poetry as one that encourages the reader to think about locality and geopolitics as possible sites of conflict, as sites of understanding power and the kinds of agency that they enable in the environments where oil is extracted to feed global consumption.     

Rethinking Social Work's Interpretation of ‘Environmental Justice’: From Local to Global

This article challenges social workers to expand their understanding of the ‘person-in-environment’ perspective and become more active in addressing current environmental crises. Although social work scholars have begun to explore the relationship between social work and the natural and built environment and professional organizations mandate the integration of this content into practice and education, these goals remain unrealized, particularly in the USA. To address these issues more effectively, social work educators will need to distinguish between understanding persons in their environment and environmentalism, and between environmentalism and environmental justice. This article analyzes the emergence of the environmental justice movement in the USA and other nations and its relationship to environmental racism. It presents a case study of a local environmental justice effort to demonstrate how social workers can use their knowledge and skills to make important contributions to environmental justice and sustainability. It also discusses the potential of ‘green social work’ and transformative learning theory as tools to help social work educators better equip students to make strategic alliances across professions, disciplines, and systems to address contemporary environmental crises.     

Beliefs and Behaviors of Pregnant Women with Addictions Awaiting Treatment Initiation

Substance use during pregnancy poses clear risks to children’s healthy development. However, women with addictions face unique barriers to accessing substance abuse treatment and often delay or avoid treatment seeking. The objective of this study was to examine women’s beliefs about the impact of use on the developing baby and to examine the protective behaviors that women with addictions engage in during the period of time between when they first find out they are pregnant and when they begin substance abuse treatment. Semi-structured interviews were conducted with 15 women who were either pregnant or postpartum and who had used illicit substances during pregnancy. All participants were currently receiving inpatient substance abuse treatment services to address their addiction and were asked to retrospectively report on their experiences. Interviews were transcribed, imported into a qualitative data analysis software, and iteratively coded for themes. Women reported being concerned about the impact of substance use on the developing baby, in particular, about the physical and long-term developmental consequences of prenatal exposure. Given these concerns, women described trying to protect the baby from harm on their own, outside of accessing traditional treatment services. They sought information anonymously, increased their engagement in health-promoting behaviors, and decreased their use of alcohol and other drugs. The results suggest that women who use alcohol and other drugs during pregnancy are often motivated to protect their baby from harm and are engaging in harm reduction behaviors prior to accessing treatment services.     

Education and the changing age pattern of American fertility: 1963–1989

Using pooled data from the 1980, 1985, and 1990 Current Population Surveys, we describe fertility trends by age and education for the period 1963–1989. Interest focuses on whether the effects of education have changed across this period. We show that women with college degrees experienced dramatic shifts toward later ages of childbearing. This shift is consistent with arguments we develop about the increased opportunity for women to pursue careers and about changes in the availability of child care     

The mental health demographic profile system: A longitudinal information system

This paper presents the plans currently being developed to make the Mental Health Demographic Profile System into a longitudinal information system useful for research and program planning. Topics discussed are as follows:

1. Development of a data base that contains 1960, 1970, and 1980 small areas (census tracts, MCDs or CCDs, counties). Preliminary tables for 1960,and 1970 will be displayed. Problems of identifying constant small areas for 1960 and 1970 are discussed.
2. Items to be included in the standard profile and items to be available for use (but not part of the standard profile) are discussed.
3. Improvement of access to the data system is discussed. This includes a discussion of the interactive programs being developed and the possible transfer of service and maintenance functions (but not development functions) to the National Center for Health Statistics.