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Probing The Trans-Sialidase Activity Of The Neuraminidase Derived From Human Influenza A (H3n2) Virus, Eva Kalemera Aluvaala

All Master’s Theses

Sialo-oligosaccharides are found on the distal ends of glycans present on mammalian cell surfaces. They play major roles in cell growth, function, and are determinants of many disease states. Due to the important physiological role of glycoconjugates, there has been increased focus towards the development of drugs and vaccines that are carbohydrate based. Sialo-oligosaccharides can be synthesized through chemical means or by use of enzymes. Enzymes are preferred in the synthesis process as they are cheaper, faster and capable of catalyzing the synthesis of molecules with the correct specificity. These being the case enzymes with activities capable of synthesizing glycoconjugates …

Post-Racial Proxies: Resurgent State And Local Anti-"Alien" Laws And Unity-Rebuilding Frames For Antidiscrimination Values, Mary D. Fan

Articles

Though unauthorized migration into the United States has diminished substantially since 2007, anti-“illegal alien” state and local laws and furor are flaring again. While one of the biggest worries regarding such “anti-alien” laws is the risk of racialized harm, courts invalidating overreaching statutes are relying on structural or procedural grounds, such as preemption and due process doctrines. [PARA] This Article examines how these political and legal trends point to how proxies are used in a post-racial era to dance around race, in constructive, national unity-rebuilding as well as divisive, inflammatory ways. Anti-alien legislation is a proxy way to vent resurgent …

Optimal Control Applied To A Discrete Time Influenza Model, Paula Andrea Gonzalez Parra

Open Access Theses & Dissertations

For the last decades, mathematical epidemiological models have been used to understand the dynamics of infectious diseases and guide public health policy.

In particular, several continuous models have been considered to study influenza outbreaks and their controls policies. However, most epidemiological data is discrete; therefore, a discrete formulation is more convenient to compare collected data with the output of the model. We introduce a discrete time model in order to study optimal control strategies for influenza transmission.

In our model, we divide the population into four classes: susceptible, infectious, treated, and recovered individuals.

In particular, we evaluate the potential effect …

Phospholipid Analysis In Trypanosoma Cruzi, Melissa Rashonda Harris

Open Access Theses & Dissertations

Chagas disease, caused by the flagellate protozoan Trypanosoma cruzi is one of the most endemic and deadly infectious diseases. T.cruzi is distributed throughout most of South and Central America, where it infects 12 to 19 million people, with an annual incidence of 561,000. Another 35 million are exposed to infection, 2 to 3 million people have clinical symptoms of chronic Chagas disease, and about 45,000 of these may die every year due to cardiac failure. In addition to the growing number of incidences in other countries the disease is an emerging infectious disease in the U.S due to the migration …

Molecular Mechanisms Of Poly [Adp-Ribose] Polymerase-1 In Hiv-1 Infection, Daniel Reyes

Open Access Theses & Dissertations

Poly (ADP-ribose) polymerase-1 (PARP-1) is a cellular enzyme involved in genome stability and transcriptional regulation. The role of this protein in HIV-1 infection is largely controversial. Some reports indicated a fundamental role of PARP-1 in HIV-1 DNA integration and results from other laboratories do not support these conclusions. An important characteristic in all these experiments is that the HIV-1 target cells that were used express, in addition to PARP-1, the functional homologue PARP-2. We evaluated the role of PARP-1 in the chicken B lymphoblastoid cell line DT40. These cells naturally lack PARP-2 and support the early steps of HIV infection. …

The Second-Generation Effects Of Microcredit In Western Guatemala, Jordyn Elizabeth Haught

Open Access Theses & Dissertations

Most microfinance institutions have assumed that positive second-generation effects follow involvement in microcredit, but the nature of these effects has been unclear since few scholars have directly focused their attention on them. To address this gap in the literature I conducted exploratory survey research in Western Guatemala in January 2011. I returned with 97 interviews conducted with 68 Guatemalans who had received a microloan at some point in their lives, and 29 who had never received a formal loan. In the sample of their 306 children, the parents of 94 had never received a loan, while the parents of 212 …

Insights Into A Multidrug Resistant Escherichia Coli Pathogen Of The Globally Disseminated St131 Lineage: Genome Analysis And Virulence Mechanisms, Makrina Totsika, Scott A. Beatson, Sohinee Sarkar, P Minh-Duy, Nicola K. Petty, Nathan Bachmann, Marek Szubert, Hanna E. Sidjabat, David L. Paterson, Mathew Upton, Mark A. Schembri

School of Biomedical Sciences

No abstract provided.

Gender Differences In The Processing Of Acute And Repeated Stress, Jaidee Zavala

Open Access Theses & Dissertations

Chronic stress is implicated in the pathogenesis of a variety of diseases, including affective, immune and cardiovascular disorders, which are differentially experienced by men and women. Corticotropin-releasing factor (CRF), arginine vasopressin (AVP), and glucocorticoid receptor (GR) are the major regulators of the stress response and are widely expressed in the paraventricular nucleus of the hypothalamus (PVH), where adaptive responses to stress are generated. Adult male and female rats were subjected to single (acute) or 14 consecutive daily (repeated) 30 min restraint sessions, or maintained as unstressed controls. Rats were perfused after their final restraint, and their brain tissues sectioned and …

Altered Leptin Signaling On Dendritic Cells As A Potential Mechanism For Cancer Immunotherapy, Lorena Y. De Los Santos

Open Access Theses & Dissertations

Leptin is a pleiotropic hormone synthesized primarily by white adipocytes and its receptors are expressed in a variety of tissues and cells such as in the hypothalamus and cells of the immune system. Multiple cell types can produce a considerable amount of leptin such as skeletal muscle, placenta, and osteoblasts to name a few and its synthesis has been shown to be regulated by sex hormones and a broad range of inflammatory mediators. Although leptin has been shown to directly affect immune response, we are interested in how leptin affects dendritic cell function and their ability to induce a proper …

Segundo Barrio: Rich, Poor, Or Both?, Julie Anne Krill

Open Access Theses & Dissertations

ABSTRACT

This manuscript describes an exploratory study which was undertaken in Segundo Barrio; a historic neighborhood in El Paso, Texas. The purpose of the study was to identify formal and informal sources of social support through the perceptions of female residents in different stages of life. This community, while economically disadvantaged, has unique characteristics and resources and the researcher was interested in seeing how different age groups perceive them.

Guiding Research Questions:

What sources of social support do residents of Segundo Barrio identify as key sources of support within their neighborhood, Greater El Paso, and Ciudad Juarez, Chihuahua?

* Social …

Perceptions Of Disabilities Amongst The Tarahumara In Northern Mexico, Carolyn Raynor Trussell

Open Access Theses & Dissertations

This research focuses on the perceptions of disability amongst the Tarahumara, known amongst themselves as the Rarámuri, in the Sierra Madre region of Northern Chihuahua. This population of individuals has typically lived in isolated areas in communities in the Sierra Madre where medical and specialized educational services were rare. The purpose of this study was to explore the perceptions, knowledge and beliefs related to disabilities, as well as the access and beliefs related to educational and medical services.

The study focused on the individual and the society to examine how bodily conceptions influence perceptions of others. The target group for …

First Elderly Client In Therapy: Factors That Influence Student Interest In Geropsychology, Cristina E. M. Filippelli

Antioch University Dissertations & Theses

In the coming decades, the elderly population in United States (U.S) is expected to grow significantly (U.S. Bureau of the Census, 1996). Consequently, the number of older individuals seeking mental health services will be greater than at any other time in the history of the U.S. The field of clinical psychology, however, is unable to meet the mental health needs of the current elderly population, and this gap is expected to widen in coming years. There is an ongoing discussion within the field of professional psychology as to how to train more clinicians to work with the elderly population (Gatz …

Development Of A Novel Metallo-Lipid Microparticle Delivery System For A Leishmania Mexicana Dna Vaccine Candidate, Joanna B. Valencia

Open Access Theses & Dissertations

ABSTRACT

Background and Significance.

The leishmaniases are an important group of neglected tropical parasitic diseases caused by parasitic protozoa of the genus Leishmania. International health authorities estimate that 350 million people around the world are at risk for contracting leishmaniasis. Two million new cases occur each year and 12 million people are presently infected worldwide. Leishmaniasis is endemic throughout the Americas region including all of Central America, most of South America, Mexico and southern Texas. Leishmania is also considered a threat to the military readiness of U.S. troops deployed to the Middle East or Latin America.

First- and second-line treatments …

Asphaltene As Light Harvesting Material In Dye Sensitized Solar Cell, Rajab Emhemed Abujnah

Open Access Theses & Dissertations

This Dissertation characterizes the first asphaltene DSSC (dye-sensitized solar cell), in which light to electricity conversion efficiency has improved from 0 % to 1.8 %. Four natural organic asphaltene factions, namely, un-fractionated asphaltene, Fr. 1 Asphaltene, Fr.2 asphaltene, Fr.3 and Fr.4 were extracted and tested for various solar cell parameters of TiO2 based dye-sensitized solar cell DSSC. DSSCs were fabricated using the four individual asphaltene dyes. The photovoltaic performance of the cells was examined by determining the various parameters such as open-circuit voltage, short-circuit current, fill factor, and series resistance. The overall energy conversion efficiency was also measured to correlate …

Preliminary Bacterial Study On Subclinical Mastitis And Teat Condition In Dairy Herds Around Shiraz, Masoud Haghkhah, Mohammad Rahim Ahmadi, Hamid Reza Gheisari, Ali Kadivar

Turkish Journal of Veterinary & Animal Sciences

Mastitis is a widely occurring and costly disease in the dairy industry. The aim of this study was to isolate bacterial causes of subclinical mastitis and investigate the relationship between subclinical mastitis and teat condition in dairy herds located around Shiraz, Fars province, Iran. From 7 commercial dairy herds around Shiraz 354 lactating cows were selected randomly. Subclinical mastitis was evaluated by the California Mastitis Test (CMT), electrical conductivity (EC), and somatic cell count (SCC). Teat condition was evaluated by measuring teat width and length. In the 68 samples of bacterial cultures identified, 14 different bacterial species were found. Staphylococcus …

Serological Study Of Leptospirosis Among Dairy Cattle In Bosnia And Herzegovina, Maid Rifatbegovic, Zinka Maksimovic

Turkish Journal of Veterinary & Animal Sciences

A total of 75,206 blood serum samples from dairy cattle and quarantined heifers was collected between 2001 and 2007 and analyzed for bovine leptospirosis by the microscopic agglutination test (MAT). Serovar Hardjo was used for testing of all sera, with the addition of 2 or 3 randomly chosen other serovars (Grippotyphosa, Icterohaemorrhagiae, Pomona, Bataviae, Canicola, and/or Saxcoebing). From the total number of sera tested, 1197 (1.59%) were serologically positive, with a decreasing tendency over the years of research. The most prevalent serovar was Pomona (1.32%), followed by Hardjo (0.52%) and Grippotyphosa (0.37%). The differences among the studied regions in terms …

Alternations In The Splenic Marginal Zone With Age, Shirin Z. Birjandi

Dissertations

Splenic marginal zones are architecturally organized to generate a rapid response against blood- borne antigens entering the spleen. The marginal zone is a distinct anatomical micro-environment whose main components include the marginal zone macrophages, the marginal zone B cells, the marginal zone sinus, and the metallophilic macrophages. Marginal zone macrophages, in partnership with marginal zone B cells, are particularly important in host defense against T-independent pathogens and are crucial for the prevention of diseases such as Streptococcus pneumonia. It has been widely reported that with the advancement of age there is a higher rate of mortality as a result of …

Pcr Detection Of Nearly Any Dengue Virus Strain Using A Highly Sensitive Primer ‘Cocktail’, Charul Gijavanekal, Maria Anez-Lingerfelt, Chen Feng, Catherine Putonti, George E. Fox, Aniko Sabo, Yuriy Fofanov, Richard C. Wilson

Bioinformatics Faculty Publications

PCR detection of viral pathogens is extremely useful, but suffers from thechallenge of detecting the many variant strains of a given virus that ariseover time. Here, we report the computational derivation and initial experi-mental testing of a combination of 10 PCR primers to be used in a singlehigh-sensitivity mixed PCR reaction for the detection of dengue virus. Pri-mer sequences were computed such that their probability of misprimingwith human DNA is extremely low. A ‘cocktail’ of 10 primers was shownexperimentally to be able to detect cDNA clones representing the four sero-types and dengue virus RNA spiked into total human whole blood …

Medical Alert: Alarming Challenges Facing Medical Technology Innovation, Lawrence M. Sung

Journal of Business & Technology Law

No abstract provided.

Effectiveness Of Artemether-Lumefantrine Provided By Community Health Workers In Under-Five Children With Uncomplicated Malaria In Rural Tanzania: An Open Label Prospective Study, B.E. Ngasala, M. Malmberg, A.M. Carlsson, P.E. Ferreira, M.G. Petzold, D. Blessborn, Y. Bergqvist, J.P. Gil, Zul Premji, A. Martensson

Pathology, East Africa

Background: Home-management of malaria (HMM) strategy improves early access of anti-malarial medicines to high-risk groups in remote areas of sub-Saharan Africa. However, limited data are available on the effectiveness of using artemisinin-based combination therapy (ACT) within the HMM strategy. The aim of this study was to assess the effectiveness of artemether-lumefantrine (AL), presently the most favoured ACT in Africa, in under-five children with uncomplicated Plasmodium falciparum malaria in Tanzania, when provided by community health workers (CHWs) and administered unsupervised by parents or guardians at home.

Methods: An open label, single arm prospective study was conducted in two rural villages …

Contributory Factors Of Extraneous New Bone Growth On The Endocranial Surfaces Of Human Infant And Sub-Adult Skeletal Remains, Mark Andrew Zahareas

Master's Theses

This study investigates the factors that may contribute to endocranial bone changes in human sub-adult skeletal remains in an effort to differentiate bone changes, or lesions, caused by pathological processes and those caused by growth and development. The contributory factors investigated included the presence of endocranial bone lesions, the age-at-death of the individual, the precise location of the bone change, the dynamic nature of the locations, and the presence (or absence) of postcranial and/or ectocranial indicators of pathology within the individual. The sample population used for this research was comprised of 129 individuals from 15 different Native American groups over …

Role For Histone Deacetylases In Glucocorticoid Receptor Mediated Transpression Of Natural Killer Cell Activity, Kristin Bush

Master's Theses

During periods of psychosocial distress glucocorticoids (GCs) are known to reduce the lytic activity of natural killer cells (NKCA). Glucocorticoid treatment also reduces acetylation of histone residues; however, the glucocorticoid receptor (GR) lacks deacetylase activity. GR is known to interact with histone deacetylases (HDACs) and with corepressors that mediate gene transrepression. In this investigation, GC induced histone deacetylation was demonstrated to be due to GR recruitment of HDAC1 and the corepressor complex SMRT. These data show that reduced acetylation of immune functional genes associated with NKCA is likely due to histone deacetylation by HDAC1 and transrepression of those genes by …

Estimating The Reproductive Numbers For The 2008-2009 Cholera Outbreaks In Zimbabwe, Zindoga Mukandavire, Shu Liao, Jin Wang, Holly Gaff, David L. Smith, J. Glenn Morris Jr.

Biological Sciences Faculty Publications

Cholera remains an important global cause of morbidity and mortality, capable of causing periodic epidemic disease. Beginning in August 2008, a major cholera epidemic occurred in Zimbabwe, with 98,585 reported cases and 4,287 deaths. The dynamics of such outbreaks, particularly in nonestuarine regions, are not well understood. We explored the utility of mathematical models in understanding transmission dynamics of cholera and in assessing the magnitude of interventions necessary to control epidemic disease. Weekly data on reported cholera cases were obtained from the Zimbabwe Ministry of Health and Child Welfare (MoHCW) for the period from November 13, 2008 to July 31, …

Addressing The Fertility Needs Of Hiv-Seropositive Males, Brian A. Levine, Sahadat K. Nurudeen, Jennifer T. Gosselin, Mark V. Sauer

Psychology Faculty Publications

An increasing number of serodiscordant couples are utilizing advanced reproductive technologies to address their reproductive needs. Recent literature has demonstrated that it is not only technically possible but also safe to utilize sperm-washing techniques to allow for the creation of embryos, thereby preventing both horizontal and vertical transmission of HIV. This article addresses the strengths and weakness of various reproductive techniques and discusses our experience at Columbia University (NY, USA), the location of the largest HIV-focused fertility program in the USA.

Genetic Manipulation Of The Relapsing Fever Spirochete Borrelia Hermsii Permits Novel Investigation Into The Role Of Factor H Binding In Borrelial Virulence, Lindy Fine

Theses and Dissertations

Borrelia hermsii, an etiologic agent of tick-borne relapsing fever, binds negative complement regulator factor H (FH) via its FhbA protein. Direct demonstration of the role of FhbA in the disease process has been hindered by the lack of genetic manipulation systems for the relapsing fever Borrelia. Here, we demonstrate successful generation of a B. hermsii strain YOR fhbA deletion mutant (Bh YORΔfhbA) that constitutively produces green fluorescent protein (GFP). Genetic manipulation did not affect growth rate or plasmid composition. Bh YORΔfhbA lost factor H-binding and C3b-inactivation capabilities, but retained resistance to killing in human serum and infectivity in mice. Stable …

Functional Metagenomic Investigations Of The Human Intestinal Microbiota, Aimee M. Moore, Christian Munck, Morten O.A Sommer, Gautam Dantas

Open Access Publications

No abstract provided.

What Happened To Research In Clinical Microbiology In The United States?, Paul P. Bourbeau, Carey-Ann D. Burnham

Open Access Publications

No abstract provided.

Impact Of Clinical Symptoms On Interpretation Of Diagnostic Assays For Clostridium Difficile Infections, Erik R. Dubberke, Zhuolin Han, Linda Bobo, Tiffany Hink, Brenda Lawrence, Susan Cooper, Joan Hoppe-Bauer, Carey-Ann D. Burnham, W. Michael Dunne Jr.

Open Access Publications

No abstract provided.

Methicillin-Resistant Staphylococcus Aureus Usa300 Clone As A Cause Of Lemierre's Syndrome, Jake M. Chanin, Luis A. Marcos, Bithika M. Thompson, Roger D. Yusen, W. Michael Dunne Jr., David K. Warren, Carlos A Q Santos

Open Access Publications

No abstract provided.

Structural And Functional Interactions Between The Cholera Toxin A1 Subunit And Erdj3/Hedj, A Chaperone Of The Endoplasmic Reticulum, Shane Massey, Helen Burress, Michael Taylor, Kathleen N. Nemec, Supriyo Ray, David B. Haslam, Ken Teter

Open Access Publications

No abstract provided.