Cellvibrio Research Articles

Immunomodulatory Effect of Paederia (Paederia foetida Linn.) based on Phagocytic Activity of Litopenaeus vannameii

Vannamei shrimp farming usually encounters bacterial invasions. The bacteria’s attacks make the vannamei shrimp unable to be treated. Therefore, farmers must prevent the attacks by increasing their immunity. In this research, the researchers observed the immune response ability of the shrimp using the phagocytic activity of Litopenaeus vannameii as an indicator. The researchers prepared paederia flour, a mixture of commercial shrimp feed, and various formulations, starting from 0%, 10%, 20%, 40%, and 80%. The researchers determined the phagocytic activity of the mixture of Vibrio alginoliticus bacteria cells in shrimp blood. The researchers observed the phagocytosis of vannameii shrimp at 0, 10, 20, and 30 days. The results showed no significant effects of the applied treatment on phagocytosis activity. The sig-value is 0.067, with a significant confidence level of 5. The highest phagocytic activity in the treatment of Paederia addition was 40%, with the number of macrophage cells found in the phagocyte bacterial cell Vibrio alginoliticus at 41.29%.

In silico modelling for predicting the cationic hydrophobicity and cytotoxicity of ionic liquids towards the Leukemia rat cell line, Vibrio fischeri and Scenedesmus vacuolatus based on molecular interaction potentials of ions

In this study we present prediction models for estimating in silico the cationic hydrophobicity and the cytotoxicity (log [1/EC50]) of ionic liquids (ILs) towards the Leukemia rat cell line (IPC-81), the marine bacterium Vibrio fischeri and the limnic green algae Scenedesmus vacuolatus using linear free energy relationship (LFER) descriptors computed by COSMO calculations. The LFER descriptors used for the prediction model (i.e. excess molar refraction (E), dipolarity/polarizability (S), hydrogen-bonding acidity (A), hydrogen-bonding basicity (B) and McGowan volume (V)) were calculated using sub-descriptors (sig2, sig3, HBD3, HBA4, MR, and volume) derived from COSMO–RS, COSMO and OBPROP. With the combination of two solute descriptors (B, V) of the cation we were able to predict cationic hydrophobicity values (log ko ) with r 2 = 0.987 and standard error (SE) = 0.139 log units. By using the calculated log k o values, we were able to deduce a linear toxicity prediction model. In the second prediction study for the cytotoxicity of ILs, analysis of descriptor sensitivity helped us to determine that the McGowan volume (V) terms of the cation was the most important predictor of cytotoxicity and to simplify prediction models for cytotoxicity of ILs towards the IPC-81 (r 2 of 0.778, SE of 0.450 log units), Vibrio fischeri (r 2 of 0.762, SE of 0.529 log units) and Scenedesmus vacuolatus (r 2 of 0.776, SE of 0.825 log units). The robustness and predictivity of the two models for IPC-81 and Vibrio fischeri were checked by comparing the calculated SE and r 2 (coefficient of determination) values of the test set.

Vaccination strategies to combat an infectious globe: Oral cholera vaccines

Cholera is a substantial health burden in many countries in Africa and Asia, where it is endemic. It is as well responsible for ongoing epidemics in sub-Saharan Africa which are becoming greater in terms of frequency, extension, and duration. Given the availability of two oral cholera vaccines and the new data on their efficacy, field effectiveness, feasibility, and acceptance in cholera-affected populations and in travelers, these vaccines should be used in endemic areas, in travelers for these areas and should be considered in areas at risk for outbreaks. The two vaccines currently available in worldwide are: (1) The killed oral vaccine (Dukoral, licensed by SBL–Sweden to Crucell–Holland) is recommended since 1999 by WHO and consists of a mixture of four preparations of heat or formalin killed whole cell Vibrio cholera O1 (Inaba and Ogaba serotypes, and classical and El Tor biotypes) that are then added with purified recombinant cholera toxin (CT) B subunit. Because CT cross-reacts with Escherichia coli LT the vaccine also provides short-term protection against ETEC (enterotoxigenic E. coli) which is of added benefit for travelers. It is available in more than 60 countries. (2) A bivalent O1 and O139 whole cell oral vaccine without CT B subunit (Shanchol) has been lately developed in Vietnam (licensed by VaBiotech–Viet Nam to Shantha Biotechnics–India. It is available in India and Indonesia. A structured search of papers in PubMed and reports on cholera vaccines by WHO and CDC, as well as critical reading and synthesis of the information was accomplished. Inclusion criteria were defined according to reports quality and relevance.

Some Properties of Cellulolytic Cellvibrio Strains from Polluted Water

Some Properties of Cellulolytic <i>Cellvibrio</i> Strains from Polluted Water

Some Properties of Cellulolytic Cellvibrio Strains from Polluted Water

Some Properties of Cellulolytic Cellvibrio Strains from Polluted Water