Host And Viral Determinants Influencing The Pathogenesis Of Coronavirus-induced Neurological Disease In Rodents

Host and viral determinants influencing the outcome of coronavirus JHM infections of the CNS of rodents were investigated using intact animals and primary neural cell cultures. Two problems pertinent to the process of pathogenesis were addressed. The first was concerned with elucidating host factors responsible for controlling the age dependent nature for induction of the demyelinating form of disease in suckling rats. In the second, the basis of the relative resistance exhibited by inbred SJL/J mice to JHMV was examined in relation to both host and viral determinants.;Using primary, dissociated neural cultures from perinatal rats, several interesting aspects of host cell tropism having potential significance to the process of pathogenesis were found. Neurons were identified as important targets for both wt and neuroattenuated variants of JHMV. Moreover, immunofluorescent and electron microscopic analysis of infected neurons revealed that trafficking of viral structural proteins and virions occurs into neurites, consistent with the notion that transneuronal transport of virus takes place. Assessment of JHMV tropism for oligodendrocyte-type-2 astrocyte (O-2A) lineage cells, whcih are responsible for myeline formation within the CNS, revealed some provocative findings. Culture conditions that maintained these cells in a mitotically active, migratory, progenitor state correlated with virus non-permissiveness. By contrast, culture conditions that encouraged O-2A differentiation into oligodendrocytes correlated with a semi-permissive state for JHMV. These data, combined with the previous finding that JHMV does not replicate in terminally differentiated oligodendrocytes, suggest that permissiveness of O-2A cells for JHMV is restricted to a \u27window\u27 in their development. This coincides in vivo with the second and third weeks of postnatal life, when induction of demyelinating disease by this agent is optimal.;Finally, whole animals and primary neural cultures, in combination with viral spike protein variants were used to analyze virus-cell and virus-host interactions in relationship to the observed resistance of SJL/J mice to JHMV. Based on these studies, it was concluded that SJL/J resistance to JHMV-induced neurologic disease may result from the combination of inefficient cell-to-cell spread of the infection and protection by the cellular immune response

Education for Some: The Inadequacy of Educational Programs Offered to Youth Offenders in Adult and Juvenile Correctional Facilities

As an adherent to the U.N.’s Universal Declaration of Human Rights, the United States has made a commitment to social justice. As a part of this commitment, the U.S. maintains that the right to an education is both innate and compulsory. This paper addresses U.S. government’s failure to uphold its citizens’ educational rights, made clear by the inadequacy of the educational programs currently offered to juvenile offenders. Based on the findings of recent scholarly literature, this paper argues that both juvenile and adult correctional institutions lack the resources necessary to provide proper educational instruction and adequately address the special educational needs of juvenile offenders. To help the U.S. maintain its commitment to social justice, alternatives to juvenile incarceration are propose

Latinos and Cancer Information: Perspectives of Patients, Health Professionals and Telephone Cancer Information Specialists

Semi-structured interviews were conducted with 16 Latino cancer patients diagnosed in California; 10 health professionals from the San Francisco Bay Area and Fresno, California; and 10 Cancer Information Services (CIS) information specialists from the regional offices handling calls from Spanish-speakers. Interview guides were designed by the investigators to answer three main research questions: 1) How do Latinos obtain information about cancer and what types of information do they access?; 2) What sources of cancer information do they seek out and find credible?; and 3) What are the barriers and facilitators to Latinos obtaining cancer information? Stakeholders generally viewed health professionals as the most credible source of cancer information. All groups regarded family and friends as important sources of information. Patients and health professionals tended to differ on the value of print materials. Although patients found them generally useful, health professionals tended to view them as inadequate for meeting the informational needs of their Latino patients due to the challenge of low health literacy. Health professionals also tended to undervalue internet resources compared to patients and CIS specialists. All stakeholders viewed language, ethnic discordance and the impact on patients of the initial diagnosis as barriers to effective communication of cancer information. Health professionals and CIS specialists, but not patients, mentioned low literacy as a barrier. Our findings underscore the importance of the physician-patient relationship as a point of intervention to address the unmet informational and psychosocial needs of Latino cancer patients

The Costs of an Outreach Intervention for Low-Income Women With Abnormal Pap Smears

INTRODUCTION: Follow-up among women who have had an abnormal Papanicolaou (Pap) smear is often poor in public hospitals that serve women at increased risk for cervical cancer. This randomized controlled trial evaluated and compared the total cost and cost per follow-up of a tailored outreach intervention plus usual care with the total cost and cost per follow-up of usual care alone. METHODS: Women with an abnormal Pap smear (n = 348) receiving care at Alameda County Medical Center (Alameda County, California) were randomized to intervention or usual care. The intervention used trained community health advisors to complement the clinic's protocol for usual care. We assessed the costs of the intervention and the cost per follow-up within 6 months of the abnormal Pap smear test result. RESULTS: The intervention increased the rate of 6-month follow-up by 29 percentage points, and the incremental cost per follow-up was $959 (2005 dollars). The cost per follow-up varied by the severity of the abnormality. The cost per follow-up for the most severe abnormality (high-grade squamous intraepithelial lesion) was$681, while the cost per follow-up for less severe abnormalities was higher. CONCLUSION: In a health care system in which many women fail to get follow-up care for an abnormal Pap smear, outreach workers were more effective than usual care (mail or telephone reminders) at increasing follow-up rates. The results suggest that outreach workers should manage their effort based on the degree of abnormality; most effort should be placed on women with the most severe abnormality (high-grade squamous intraepithelial lesion)

Epidemiological and evolutionary inference of the transmission network of the 2014 highly pathogenic Avian Influenza H5N2 outbreak in British Columbia, Canada

The first North American outbreak of highly pathogenic avian influenza (HPAI) involving a virus of Eurasian A/goose/Guangdong/1/1996 (H5N1) lineage began in the Fraser Valley of British Columbia, Canada in late November 2014. A total of 11 commercial and 1 non-commercial (backyard) operations were infected before the outbreak was terminated. Control measures included movement restrictions that were placed on a total of 404 individual premises, 150 of which were located within a 3 km radius of an infected premise(s) (IP). A complete epidemiological investigation revealed that the source of this HPAI H5N2 virus for 4 of the commercial IPs and the single non-commercial IP likely involved indirect contact with wild birds. Three IPs were associated with the movement of birds or service providers and localized/environmental spread was suspected as the source of infection for the remaining 4 IPs. Viral phylogenies, as determined by Bayesian Inference and Maximum Likelihood methods, were used to validate the epidemiologically inferred transmission network. The phylogenetic clustering of concatenated viral genomes and the median-joining phylogenetic network of the viruses supported, for the most part, the transmission network that was inferred by the epidemiologic analysis

Healthy Colon, Healthy Life (Colon Sano, Vida Sana): Colorectal Cancer Screening Among Latinos in Santa Clara, California

Colorectal cancer (CRC) screening rates are low among Latinos. To identify factors associated with CRC screening, we conducted a telephone survey of Latino primary care patients aged 50–79 years. Among 1,013 participants, 38% were up-to-date (UTD) with fecal occult blood test (FOBT); 66% were UTD with any CRC screening (FOBT, sigmoidoscopy, or colonoscopy). Individuals less than 65, females, those less acculturated, and patients of female physicians were more likely to be UTD with FOBT. CRC screening among Latinos is low. Younger patients, women, and patients of female physicians receive more screening

Highly Pathogenic Avian Influenza Virus A (H7N3) in Domestic Poultry, Saskatchewan, Canada, 2007

Epidemiologic, serologic, and molecular phylogenetic methods were used to investigate an outbreak of highly pathogenic avian influenza on a broiler breeding farm in Saskatchewan, Canada. Results, coupled with data from influenza A virus surveillance of migratory waterfowl in Canada, implicated wild birds as the most probable source of the low pathogenicity precursor virus

Susceptibility of Pigs and Chickens to SARS Coronavirus

An outbreak of severe acute respiratory syndrome (SARS) in humans, associated with a new coronavirus, was reported in Southeast Asia, Europe, and North America in early 2003. To address speculations that the virus originated in domesticated animals, or that domestic species were susceptible to the virus, we inoculated 6-week-old pigs and chickens intravenously, intranasally, ocularly, and orally with 106 PFU of SARS-associated coronavirus (SARS-CoV). Clinical signs did not develop in any animal, nor were gross pathologic changes evident on postmortem examinations. Attempts at virus isolation were unsuccessful; however, viral RNA was detected by reverse transcriptase-polymerase chain reaction in blood of both species during the first week after inoculation, and in chicken organs at 2 weeks after inoculation. Virus-neutralizing antibodies developed in the pigs. Our results indicate that these animals do not play a role as amplifying hosts for SARS-CoV