Inhoudsopgave
Welke bacterie veroorzaakte de pest?
Pest is een infectieziekte die wordt veroorzaakt door de bacterie Yersinia pestis. De ziekte is een zoönose wat inhoudt dat de bacterie wordt overgedragen van dieren naar mensen. Pest circuleert met name onder wilde knaagdieren en vlooien.
Wat is Yersinia kweek?
Voor detectie van gastro-enteritis op basis van Yersinia enterocolitica wordt een bacteriële gastroenteritis PCR verricht. Kweek wordt verricht naar aanleiding van een positieve PCR. De PCR detecteert Y. pseudotuberculosis niet, hiervoor moet een kweek aangevraagd worden.
Hoeveel ontlasting voor kweek?
Als de ontlasting wordt opgevangen in een luier, is het van belang een aantal schepjes van de diarree uit de luier te schrapen en in het potje te doen. Het potje mag maximaal halfvol zijn, maar moet minimaal de hoeveelheid ter grootte van een walnoot bevatten.
Is Yersinia pestis Gram positive or negative?
The Gram-negative bacterium Yersinia pestis is responsible for deadly plague, a zoonotic disease established in stable foci in the Americas, Africa, and Eurasia. Its persistence in the environment relies on the subtle balance between Y. pestis-contaminated soils, burrowing and nonburro …
What is the pathophysiology of Yersinia pestis?
Yersinia pestis is gram-negative rods responsible for highly fatal zoonotic disease, plague. Plague is one of the greatest killers known to mankind with at least three pandemics reported in history.
Is Yersinia pestis non motile?
Non-motile: Yersinia pestis is non-motile both at 25°C and 37°C; in contrast to other Yersinia species which are motile at 25°C but non-motile at 37°C. Human can be infected by plague through: Bite of infected rat fleas (human fleas may rarely serve as a vector).
What does Gram staining of Yersinia pestis smear reveal?
Gram staining of culture smear reveals gram-negative rods or coccobacilli (pleomorphism). Involution forms are seen in older cultures. It shows bipolar staining (ends of the bacillus stain darker than the central part). Y. pestis identification flowchart.
What is Yersinia pestis?
Yersinia pestis (formerly Pasteurella pestis) is a Gram-negative, nonmotile, rod-shaped, coccobacillus bacteria, with no spores. It is a facultative anaerobic organism that can infect humans via the Oriental rat flea. It causes the disease plague, which takes three main forms: pneumonic, septicemic and bubonic plagues.
Is Pasteurella pestis Gram positive or negative?
Yersinia pestis (formerly Pasteurella pestis) is a Gram-negative, nonmotile, rod-shaped coccobacillus, with no spores. It is a facultative anaerobic organism that can infect humans via the oriental rat flea. Named Pasteurella pestis in the past, the organism was renamed Yersinia pestis in 1944.
How do humans spread Yersinia pestis?
If the disease has progressed to the pneumonic form, humans can spread the bacterium to others by coughing, vomiting, and possibly sneezing. Several species of rodents serve as the main reservoir for Y. pestis in the environment.
Who discovered Yersin pestis?
Y. pestis was discovered in 1894 by Alexandre Yersin, a Swiss / French physician and bacteriologist from the Pasteur Institute, during an epidemic of the plague in Hong Kong. Yersin was a member of the Pasteur school of thought. Kitasato Shibasaburō, a German -trained Japanese bacteriologist who practised Koch’s…