Cholera is an intestinal infection causes by the bacterium Vibrio cholerae. Increased release of water from the intestines leads to diarrhea. Cholera spreads through eating and drinking contaminated food and water. A person suffers abdominal cramps, vomiting, dehydration, dry skin and nausea. Watery stools, low blood pressure and palpitations are other symptoms of cholera. Blood culture and stool culture are done to investigate. Intravenous fluids and antibiotics aid recovery. If left untreated, cholera can lead to electrolyte imbalance and renal failure and sometimes death.
Gastroenteritis and bacterial diarrhea are the most common forms of infections that occur both in children and adults. These infections are predominant in tropical regions. The most common etiology for diarrhea is either through parasitic infections or bacterial infections. Both these forms have distinctive clinical characteristics. The identification of the type of disease caused can provide a comprehensive route to differentiate and treat the disease through appropriate anti-parasitic or anti-microbial drugs.
Gastroenteritis or enteric fever identification is characterized by abdominal discomfort, diarrhea and extreme dehydration. In most cases, these kinds of infections occur because of food or water borne contamination. The differential diagnosis of this condition in order to identify the disease is done through additional clinical symptoms, physiological changes and bio-chemical metabolic pathways. One of the most important factors in the identification of bacterial enteric fever is the presence of associated sepsis and spiking fever. In addition to this, in epidemic and highly infectious diseases like Cholera, caused by Vibrio cholera, the cyclic AMP(adenosine mono phosphate) levels are elevated leading to intense dehydration which can be fatal if left unattended.
In case of bacterial enteric fever or associated diarrheas, stool specimens help understand and identify the type of organism causing the disease. Stool specimens are collected by patients in sterile container and the areas of stool in which blood and mucous are present are used for processing as they are useful portions of the specimen. The obtained media is usually transported by incorporating a transport media to avoid bacterial count decline because of varied PH of the external environment.
Microbiological media such as Selenite feces broth, Mackonkey agar, Salmonella Shigella agar, TCBS medium and Nagglers medium are used in the culture laboratory to identify disease causing organisms such as Salmonella(Typhoid, enteric fever) Shigella( Diarrhea) E.coli 0167or entero - hemorrhagic (Traveler's Diarrhea), Clostridium Botulinum(Food poisoning), Vibrio cholera( Cholera) and Campylobacter.
Apart from these bacteria, stool cultures are also done to identify the presence of enteric viruses such as Rota virus which causes viral gastroenteritis. All organisms isolated are subjected to respective antimicrobial assay to determine the suitable drugs for the respective organism. Careful precautions are taken and clinical details of the patient are recorded by the microbiologist to administer specific drugs for specific organisms. This helps to prescribe medications to specific persons too, such as pregnant and lactating women and children.
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Collection of Pages - Last revised Date: March 20, 2023