What are the differential diagnosis of cholera?
Cholera should be differentiated from other infectious causes of diarrhea such as rotavirus, E. coli, amoebic dysentry, and giardiasis. Cholera should also be differentiated from some non-infectious causes of diarrhea such as VIPoma, tubulovillous adenoma, and food poisoning.
What is the standard testing use in diagnosing for cholera?
The culture method is the gold standard or most recommended test for diagnosis of cholera. Stool samples taken from a patient using a sterile cotton bud are placed on a plate containing TCBS (thiosulphate citrate bile salts) agar, a selective medium that isolates the bacteria from the diarrhea.
What antibiotic is used for cholera?
In most countries, doxycycline is recommended as first-line treatment for adults (including pregnant women) and children. If resistance to doxycycline is documented, azithromycin and ciprofloxacin are alternative options.
What are the main causes of cholera?
Cholera is an acute diarrheal illness caused by infection of the intestine with Vibrio cholerae bacteria. People can get sick when they swallow food or water contaminated with cholera bacteria. The infection is often mild or without symptoms, but can sometimes be severe and life-threatening.
What is the Colour of Vibrio cholerae?
yellow
V. cholerae appears as translucent, flat, yellow colonies with elevated centers on TCBS and colorless colonies on TTGA, often with a characteristic dark center after two days growth, surrounded by a halo, which appears due to the hydrolysis of gelatin, and turquoise colonies on CHROMagar™ Vibrio (Fig. 3).
What is crystal VC dipstick test?
Rapid Visual Immunochromatographic Test for Detection of V. Cholerae in stool. Rapid, visual qualitative Immnoassay with inbuilt control line. Two separate bands for simultaneous & different detection of V.
What is a rapid dipstick test?
The sensitivity and specificity of the dipsticks were above 92 and 91%, respectively. The dipsticks represent the first rapid test which has been successfully used to diagnose cholera from rectal swabs, and this would immensely improve surveillance for cholera, especially in remote settings.
Can azithromycin treat cholera?
Conclusions. Single-dose azithromycin was effective in the treatment of severe cholera in adults. The lack of efficacy of ciprofloxacin may result from its diminished activity against V.
Is Vibrio cholerae a virus or bacteria?
A bacterium called Vibrio cholerae causes cholera infection. The deadly effects of the disease are the result of a toxin the bacteria produces in the small intestine. The toxin causes the body to secrete enormous amounts of water, leading to diarrhea and a rapid loss of fluids and salts (electrolytes).
What does RDT mean?
rapid diagnostic test
A rapid diagnostic test (RDT) is a medical diagnostic test that is quick and easy to perform. RDTs are suitable for preliminary or emergency medical screening and for use in medical facilities with limited resources.
What would indicate infection on a dipstick?
The dipstick checks for leukocytes, nitrites and traces of blood. The presence of leukocytes and blood in the urine sample indicates a possible infection, whilst the detection of nitrites points to the presence of bacteria.
Is ciprofloxacin good for cholera?
cholerae infections single and multiple dose ciprofloxacin therapy were both highly effective–with clinical rates of cure of 94% and 86% respectively (Table 4). Single-dose ciprofloxacin therapy was, however, significantly inferior in treating patients with nalidixic-acid resistant V. cholerae infection (Table 5).
How is Vibrio cholerae (Vibrio) diagnosed?
Laboratory Methods for the Diagnosis of Vibrio cholerae Centers for Disease Control and Prevention Assembly of Moore swabs Moore swabs can be made by cutting pieces of cotton gauze 4 feet long by 6 inches wide (120 cm by 15 cm), folding or rolling the gauze length-wise several times, and firmly tying the center with fishing line.
Is Vibrio cholerae the causative agent of cholera?
Keywords: Vibrio cholerae, cholera, growth, laboratory INTRODUCTION The causative agent of the diarrheal disease cholera is the Gram-negative bacterium Vibrio cholerae. This enteric pathogen naturally inhabits an aquatic environment.
How do you grow Vibrio cholerae?
Vibrio cholerae grows well under standard laboratory conditions (LB at 37°C). Vibrio cholerae is able to grow between 20°C and 45°C. Unlike other bacteria, V. cholerae is unable to survive at 4°C for extended periods. Store plates at room temperature. V. cholerae is able to grow in a wide pH range.
Is multiple passages of Vibrio cholerae recommended in broth culture?
Multiple passages of V. choleraeare not recommended, as mutations may accumulate, thus resulting in the lost of virulence traits. Autoagglutination Vibrio choleraeO1 classical biotype can autoagglutinate during growth in broth culture. Autoagglutination can be induced by growth at 30°C, starting pH 6.5.