Archive for December, 2009

Human leptospirosis can be a difficult infection to describe, as the
symptoms can vary dramatically between patients. Some symptoms are
extremely common, but only a small number of patients will experience
the severe life-threatening illness known as Weil’s disease. The
severity of the infection depends on the age and general health of the
patient, plus the serovar (strain) of bacteria involved and the number
of bacteria that entered the patient’s body. Continued

Among the various species of hard ticks, Ixodes ricinus is the most frequently
found tick throughout Europe. As with other ixodid ticks, the developmental
cycle runs through three stages. In each stage a blood meal is required in order
to develop to the next stage. Ixodes ricinus has been found to feed on more than
300 different vertebrate species. Usually, larval ticks feed on small mammals
such as mice and become infected with various microorganisms and viruses, of
which some are substantial pathogens to humans. The pathogens remain in the tick
during molting and are thus transstadially transmitted to the next developmental
stage. Pathogens transmitted to humans are the agents of Lyme borreliosis, the
tick-borne encephalitis virus, Rickettsia species, Anaplasma phagocytophilum,
occasionally Francisella tularensis, and protozoal Babesia species. Within the
scope of an EU project Ixodes ricinus ticks from all federal states of Austria
were searched by means of PCR methods for bacterial pathogens such as Anaplasma
phagocytophilum, Borrelia burgdorferi sensu lato, Coxiella burnetii, Ehrlichia
spp., Francisella tularensis, Rickettsia spp., and protozoal Babesia.
Additionally, the prevalence of Bartonella spp. in this tick species was also
determined. Besides the singular detection of Coxiella burnetii and Francisella
tularensis in one tick collection site the overall prevalence of Anaplasma
phagocytophilum, borreliae, rickettsae and babesiae in Ixodes ricinus amounted
to 15%, 14%, 6% and surprising 36% and 51%, respectively. Bartonellae were
detected in about 7%.

Rapid detection and identification of Ehrlichia species improves clinical
outcome in patients suspected of ehrlichiosis. We describe an assay that employs
multi-locus PCR and electrospray mass spectrometry (PCR/ESI-MS) to detect and
identify Ehrlichia species directly from blood specimens. The results were
compared to a colorimetric microtiter PCR (PCR-EIA) being used as a diagnostic
assay. Among 213 whole blood samples collected from patients who were clinically
suspected of ehrlichiosis from May 1 to August 1, 2008 at Vanderbilt University
Hospital, 40 were positive for an Ehrlichia species by the PCR/ESI-MS, giving a
positive rate of 18.8%. In comparison to the PCR-EIA, the PCR/ESI-MS possessed
sensitivity, specificity and positive and negative predictive values of 95.0%,
98.8%, 95.0%, and 98.8%, respectively. The 38 specimens that were positive for
Ehrlichia by both PCR/ESI-MS and PCR-EIA were further characterized to the
species level with 100% agreement between the two assays. In addition,
Rickettsia rickettsii was detected by PCR/ESI-MS from four specimens which were
confirmed retrospectively by serology and PCR-EIA. In three specimens, the
PCR/ESI-MS assay identified Pseudomonas aeruginosa, Neisseria meningitidis, and
Staphylococcus aureus; these were confirmed by culture and/or clinical diagnosis
as being clinically relevant. From specimen processing to result reporting, the
PCR/ESI-MS assay can be completed within six hours, providing another laboratory
tool for the diagnosis of ehrlichiosis. Moreover, this system may provide rapid
detection and identification of additional pathogens directly from blood
specimens. Continued

Burkitt’s lymphoma is a highly aggressive non-Hodgkin lymphoma, often presenting in extra-nodal sites. It generally has a poor spontaneous outcome and needs aggressive treatment with systemic and intrathecal chemotherapy. Occurrence at the gastric site is rare. We report the case of a 39-year old woman who presented with a prominent ulcerated lesion of the antrum corresponding histologically to a Burkitt’s lymphoma associated with Helicobacter pylori (H pylori) infection. Interphase fluorescence in situ hybridization (FISH) demonstrated c-MYC gene rearrangement in tumour cells without BCL2 or BCL6 gene translocations. Ulcer healing and tumour regression with a complete histological response were obtained 8 wk after H pylori eradication. In spite of this complete remission, taking into account the high risk of recurrence, the patient received systemic and intrathecal chemotherapy. Two years later, the patient remained in complete remission. This is the first report of a gastric Burkitt’s lymphoma responding to H pylori eradication. These findings raise the question of the potential role of H pylori in the pathogenesis of some gastric Burkitt’s lymphomas, and show the importance of searching for and eradicating the bacteria in combination with conventional chemotherapy regimens. Continued

Traditional Chinese medicine commands a unique position among all traditional medicines because of its 5000 years of history. Our own interest in natural products from traditional Chinese medicine was triggered in the 1990s, by artemisinin‐type sesquiterpene lactones from Artemisia annua L. As demonstrated in recent years, this class of compounds has activity against malaria, cancer cells, and schistosomiasis. Interestingly, the bioactivity of artemisinin and its semisynthetic derivative artesunate is even broader and includes the inhibition of certain viruses, such as human cytomegalovirus and other members of the Herpesviridae family (e.g., herpes simplex virus type 1 and Epstein‐Barr virus), hepatitis B virus, hepatitis C virus, and bovine viral diarrhea virus. Analysis of the complete profile of the pharmacological activities and molecular modes of action of artemisinin and artesunate and their performance in clinical trials will further elucidate the full antimicrobial potential of these versatile pharmacological tools from nature. Continued

Among the various species of hard ticks, Ixodes ricinus is the most frequently found tick throughout Europe. As with other ixodid ticks, the developmental cycle runs through three stages. In each stage a blood meal is required in order to develop to the next stage. Ixodes ricinus has been found to feed on more than 300 different vertebrate species. Usually, larval ticks feed on small mammals such as mice and become infected with various microorganisms and viruses, of which some are substantial pathogens to humans. The pathogens remain in the tick during molting and are thus transstadially transmitted to the next developmental stage. Pathogens transmitted to humans are the agents of Lyme borreliosis, the tick-borne encephalitis virus, Rickettsia species, Anaplasma phagocytophilum, occasionally Francisella tularensis, and protozoal Babesia species. Within the scope of an EU project Ixodes ricinus ticks from all federal states of Austria were searched by means of PCR methods for bacterial pathogens such as Anaplasma phagocytophilum, Borrelia burgdorferi sensu lato, Coxiella burnetii, Ehrlichia spp., Francisella tularensis, Rickettsia spp., and protozoal Babesia. Additionally, the prevalence of Bartonella spp. in this tick species was also determined. Besides the singular detection of Coxiella burnetii and Francisella tularensis in one tick collection site the overall prevalence of Anaplasma phagocytophilum, borreliae, rickettsae and babesiae in Ixodes ricinus amounted to 15%, 14%, 6% and surprising 36% and 51%, respectively. Bartonellae were detected in about 7%. Continued

Findings from a November 9, 2009, Environmental Health News report have revealed that many varieties of balsamic vinegar contain trace amounts of lead that are contributing to neurological and other damage in both children and adults. Ingestion of a single tablespoon of vinegar with the highest tested levels of lead was found to potentially raise a child’s blood lead level by 30% while two tablespoons a day would raise it by 55%. Continued

Genetic control of the innate immune response to Borrelia hermsii influences the course of relapsing fever in inbred strains of mice.

Benoit VM, Petrich A, Alugupalli KR, Marty-Roix R, Moter A, Leong JM, Boyartchuk VL.

Department of Molecular Genetics and Microbiology, and Program in Gene Function and Expression, University of Massachusetts Medical School, Worcester, MA 01605; Institut für Mikrobiologie und Hygiene, Charité – Universitätsmedizin Berlin, Campus Charité Mitte, 10117 Berlin, Germany; Department of Microbiology and Immunology, Thomas Jefferson University, Philadelphia, PA 19107. Continued

INTRODUCTION: Lyme disease (LD) is a tick-borne disease, caused by Borrelia burgdorferi sensu lato spirochetes, transmitted by Ixodes ricinus complex ticks, which leads to multiple systemic clinical manifestations. In Brazil, a different syndrome is described that mimics LD symptoms, but that also manifests high frequencies of recurrent episodes and immune-allergic manifestations. It is transmitted by the Amblyomma cajennense tick and the etiological agent is an uncultivable spirochete with atypical morphology. Due to its particularities, this emerging zoonosis has been called Brazilian LD-like syndrome or Baggio-Yoshinari Syndrome (BYS).
OBJECTIVE: To describe the neurological spectrum of BYS.
PATIENTS: Thirty patients with neurological symptoms of BYS were analysed.
RESULTS: Mean age of patients was 34.2 ± 13.3 years old (6 to 63 years); 20 were females and 10 males. A high number of recurrent episodes (73.6%) and severe psychiatric or psycho-social disturbances (20%) were distinguishing features. Erythema migrans similar to those seen in the Northern hemisphere was identified in 43.3% of patients at disease onset. The recurrence of skin lesions diminished as the disease progressed. Articular symptoms (arthritis) happened in nearly half of patients at BYS onset and during relapsing episodes.
CONCLUSIONS: The BYS is considered a new tick borne disease in Brazil that differs from classical LD observed in the Northern hemisphere. BYS replicates most of the neurological symptoms observed in LD, except for the additional presence of relapsing episodes and the tendency to cause chronic neurological and articular manifestations. 

http://www.scielo.br/pdf/rbr/v49n5/en_v49n5a03.pdf

Complications such as arrhythmias, kidney failure, stroke and infections may occur after major surgery. Everyone scheduled for surgery needs to increase their stores of magnesium. In the pre and postoperative phases magnesium can help alleviate pain, decrease blood pressure, alleviate certain heart arrhythmias; it works to prevent blood clotting, relieves depression so common after bypass surgery, and improves energy and cognitive abilities.

Continued