Typhoid is an acute infectious disease of intestine. It is caused by Gram-negative, enteric bacterium, Salmonella typhi, commonly found in the intestine of man. It is oval in shape and measures \(3 \, u\) in length and \(0.6\, u\) in width. Most cases of typhoid result from eating infected food or from drinking contaminated water, which becomes contaminated by direct contact with the urine or faeces of an infected person.
So, the correct answer is (C): Salmonella
Typhoid fever is caused by Salmonella typhi. It is transmitted through the consumption of contaminated food. When the bacteria is ingested into the body then enter into the gastrointestinal tract and there they multiply. The symptoms of typhoid fever are headache, abdominal pain, weakness and fatigue. Prevention can be done by maintaining food hygiene.
So, the correct answer is (C): Salmonella
For bacterial growth in a cell culture, growth law is very similar to the law of radioactive decay. Which of the following graphs is most suitable to represent bacterial colony growth? Where \( N \)
- Number of Bacteria at any time, \( N_0 \)
- Initial number of Bacteria.
Read the following passage and answer the questions that follow: “Mosquitoes are drastically affecting the human health in almost all the developing tropical countries. Different species of mosquitoes cause very fatal diseases so much so that many humans lose their life and if they survive, are unable to put in productive hours to sustain their life. With the result, the health index of the country goes down.”
Explain the events which occur within a female Anopheles mosquito after it has sucked blood from a malaria patient.
Health is described as a state of complete physical, mental and social well-being.
The disease is a circumstance where malfunctioning of the body organs occurs leading to uneasiness and discomfort.
Read More: Human Health and Disease