scholarly journals Murine Typhus: Clinical and epidemiological aspects

2012 ◽  
pp. 175-180 ◽  
Author(s):  
Gaspar Peniche Lara ◽  
Karla R. Dzul Rosado ◽  
Jorge Ernesto Zavala Velásquez ◽  
Jorge Zavala-Castro
Keyword(s):  
Dengue Fever ◽  
High Frequency ◽  
Relevant Information ◽  
Intracellular Bacteria ◽  
Murine Typhus ◽  
Rickettsia Typhi ◽  
Specific Antibodies ◽  
Xenopsylla Cheopis ◽  
Organ Specific

Rickettsia typhi is an intracellular bacteria who causes murine typhus. His importance is reflected in the high frequency founding specific antibodies against R. typhi in several worldwide seroepidemiological studies, the seroprevalence ranging between 3-36%. Natural reservoirs of Rickettsia typhi are rats (some species belonging the Rattus Genus) and fleas (Xenopsylla cheopis) are his vector. This infection is associated with overcrowding, pollution and poor hygiene. Typically presents fever, headache, rash on trunk and extremities, in some cases may occur organ-specific complications, affecting liver, kidney, lung or brain. Initially the disease is very similar to other diseases, is very common to confuse the murine typhus with Dengue fever, therefore, ignorance of the disease is a factor related to complications or non-specific treatments for the resolution of this infection. This paper presents the most relevant information to consider about the rickettsiosis caused by Rickettsia typhi.

Despeckling of Sar Images Using Shrinkage of Two-Dimensional Discrete Orthonormal S-Transform

2020 ◽  
pp. 2150023
Author(s):  
Priya R. Kamath ◽  
Kedarnath Senapati ◽  
P. Jidesh
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Relevant Information ◽  
Detection Algorithm ◽  
Two Dimensional ◽  
Sar Images ◽  
S Transform ◽  
Processing Step ◽  
Frequency Components ◽  
Shock Filter

Speckles are inherent to SAR. They hide and undermine several relevant information contained in the SAR images. In this paper, a despeckling algorithm using the shrinkage of two-dimensional discrete orthonormal S-transform (2D-DOST) coefficients in the transform domain along with shock filter is proposed. Also, an attempt has been made as a post-processing step to preserve the edges and other details while removing the speckle. The proposed strategy involves decomposing the SAR image into low and high-frequency components and processing them separately. A shock filter is used to smooth out the small variations in low-frequency components, and the high-frequency components are treated with a shrinkage of 2D-DOST coefficients. The edges, for enhancement, are detected using a ratio-based edge detection algorithm. The proposed method is tested, verified, and compared with some well-known models on C-band and X-band SAR images. A detailed experimental analysis is illustrated.

Mixed cryoglobulinemia: the role of HCV and organ-specific antibodies

1996 ◽  
pp. 283-293
Author(s):  
S. Bombardieri ◽  
A. Tavoni ◽  
M. Mosca ◽  
L. La Civita ◽  
M. P. Dolcher ◽  
...  
Keyword(s):  
Mixed Cryoglobulinemia ◽  
Specific Antibodies ◽  
Organ Specific

scholarly journals Rickettsia typhi IN RODENTS AND R. felis IN FLEAS IN YUCATÁN AS A POSSIBLE CAUSAL AGENT OF UNDEFINED FEBRILE CASES

2015 ◽  
Vol 57 (2) ◽  
pp. 129-132 ◽  
Author(s):  
Gaspar PENICHE-LARA ◽  
Karla DZUL-ROSADO ◽  
Carlos PÉREZ-OSORIO ◽  
Jorge ZAVALA-CASTRO
Keyword(s):  
Rattus Rattus ◽  
Conventional Polymerase Chain Reaction ◽  
Causal Agent ◽  
Wild Rodents ◽  
Murine Typhus ◽  
Rickettsia Typhi ◽  
Rickettsia Felis ◽  
Vector Borne ◽  
Polymerase Chain ◽  
First Time

Rickettsia typhi is the causal agent of murine typhus; a worldwide zoonotic and vector-borne infectious disease, commonly associated with the presence of domestic and wild rodents. Human cases of murine typhus in the state of Yucatán are frequent. However, there is no evidence of the presence of Rickettsia typhi in mammals or vectors in Yucatán. The presence of Rickettsia in rodents and their ectoparasites was evaluated in a small municipality of Yucatán using the conventional polymerase chain reaction technique and sequencing. The study only identified the presence of Rickettsia typhi in blood samples obtained from Rattus rattus and it reported, for the first time, the presence of R. felis in the flea Polygenis odiosus collected from Ototylomys phyllotis rodent. Additionally, Rickettsia felis was detected in the ectoparasite Ctenocephalides felis fleas parasitizing the wild rodent Peromyscus yucatanicus. This study’s results contributed to a better knowledge of Rickettsia epidemiology in Yucatán.

scholarly journals Organ-specific Antibodies in Patients with Lichen Sclerosus

BMJ ◽  
1974 ◽  
Vol 4 (5936) ◽  
pp. 78-79 ◽  
Author(s):  
S. K. Goolamali ◽  
E. W. Barnes ◽  
W. J. Irvine ◽  
S. Shuster
Keyword(s):  
Lichen Sclerosus ◽  
Specific Antibodies ◽  
Organ Specific

Antithyroid and Other Organ-specific Antibodies in Saudi Arab Diabetic and Normal Children

1990 ◽  
Vol 7 (1) ◽  
pp. 50-52 ◽  
Author(s):  
M.A. Abdullah ◽  
H. Bahakim ◽  
M.O. Gad Al Rab ◽  
K. Halim ◽  
H. Salman ◽  
...  
Keyword(s):  
Normal Children ◽  
Specific Antibodies ◽  
Organ Specific

Antibodies against serotonin and gangliosides in schizophrenia and major depressive disorder

1992 ◽  
Vol 7 (5) ◽  
pp. 209-212 ◽  
Author(s):  
K Schott ◽  
A Batra ◽  
R Klein ◽  
M Bartels ◽  
W Koch ◽  
...  
Keyword(s):  
Major Depressive Disorder ◽  
Depressive Disorder ◽  
Serotonin Receptor ◽  
Blood Donors ◽  
Major Depressive ◽  
Similar Frequency ◽  
Specific Antibodies ◽  
Schizoaffective Psychosis ◽  
Organ Specific ◽  
Antibodies To Serotonin

SummarySerum-antibodies against an organ specific CNS antigen as well as against serotonin and gangliosides (Gm 1) were analysed by ELISA in 34 patients with schizophrenia, ten patients with schizoaffective psychosis and 13 patients with major depressive disorder. Sixty-two patients with various rheumatic disorders and 32 blood donors were included in the study as controls. Sixty-two percent of the 13 patients with major depressive disorder had antibodies to serotonin and 69% to gangliosides, whereas antibody positive sera was only found in 38% of the 34 patients with schizophrenia. The same antibodies were found in only 6% (antibodies to serotonin) and 13% (antibodies to gangliosides) of the 32 blood donors and in a similar frequency in patients with schizoaffective psychosis. Organ specific antibodies to CNS-antigen could not be detected in the psychiatric patient group at any significant level. It is speculated that auto-immune reactions towards a serotonin receptor may be involved in the etiopathogenesis of major depressive disorder.

scholarly journals Nipah Virus Edits Its P Gene at High Frequency To Express the V and W Proteins

2009 ◽  
Vol 83 (8) ◽  
pp. 3982-3987 ◽  
Author(s):  
Sachin Kulkarni ◽  
Valentina Volchkova ◽  
Christopher F. Basler ◽  
Peter Palese ◽  
Viktor E. Volchkov ◽  
...  
Keyword(s):  
High Frequency ◽  
Nipah Virus ◽  
Open Reading Frame ◽  
Mrna Editing ◽  
Reading Frame ◽  
Specific Antibodies ◽  
P Gene ◽  
Gene Transcripts ◽  
Infected Cells ◽  
Over Time

ABSTRACT Nipah virus (NiV) is predicted to encode four proteins from its P gene (P, V, W, and C) via mRNA editing and an alternate open reading frame. By use of specific antibodies, the expression of the V, W, and C proteins in NiV-infected cells has now been confirmed. Analysis of the P-gene transcripts shows a ratio of P:V:W mRNA of 1:1:1, but this differs over time, with greater proportions of V and W transcripts observed as the infection progresses. Eighty-two percent of transcripts are edited, with up to 11 G insertions observed. This exceptionally high editing frequency ensures expression of the V and W proteins.

scholarly journals Modern Electrophysiological Methods for Brain-Computer Interfaces

2007 ◽  
Vol 2007 ◽  
pp. 1-8 ◽  
Author(s):  
Rolando Grave de Peralta Menendez ◽  
Quentin Noirhomme ◽  
Febo Cincotti ◽  
Donatella Mattia ◽  
Fabio Aloise ◽  
...  
Keyword(s):  
High Frequency ◽  
Relevant Information ◽  
Rhythm Control ◽  
Brain Computer Interfaces ◽  
Mu Rhythm ◽  
Data Set ◽  
Linear Classifiers ◽  
Computer Interfaces ◽  
Electrophysiological Studies ◽  
Paraplegic Patient

Modern electrophysiological studies in animals show that the spectrum of neural oscillations encoding relevant information is broader than previously thought and that many diverse areas are engaged for very simple tasks. However, EEG-based brain-computer interfaces (BCI) still employ as control modality relatively slow brain rhythms or features derived from preselected frequencies and scalp locations. Here, we describe the strategy and the algorithms we have developed for the analysis of electrophysiological data and demonstrate their capacity to lead to faster accurate decisions based on linear classifiers. To illustrate this strategy, we analyzed two typical BCI tasks. (1) Mu-rhythm control of a cursor movement by a paraplegic patient. For this data, we show that although the patient received extensive training in mu-rhythm control, valuable information about movement imagination is present on the untrained high-frequency rhythms. This is the first demonstration of the importance of high-frequency rhythms in imagined limb movements. (2) Self-paced finger tapping task in three healthy subjects including the data set used in the BCI-2003 competition. We show that by selecting electrodes and frequency ranges based on their discriminative power, the classification rates can be systematically improved with respect to results published thus far.

The induction of organ-specific antibodies during the graft-vs. -host reaction

1988 ◽  
Vol 18 (1) ◽  
pp. 161-166 ◽  
Author(s):  
Rudolf C. Kupers ◽  
Tobias Suiter ◽  
Ernst Gleichmann ◽  
Noel R. Rose
Keyword(s):  
Host Reaction ◽  
Specific Antibodies ◽  
Organ Specific
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