Question

46. Adhesins are A. involved in the first step of the infectious process B. often found at the tip of pili C. found in flagella. D. endotoxins. E. involved in the first step of the infectious process AND often found at the tip of pili. 47. The first step in the establishment of infection is that the organism must A. invade host tissues B. attach to host cells C. evade phagocytes D. produce toxins 48. Colonization of the body is inhibited by A. the shedding of skin cells B. the movement of mucus by cilia C. peristalsis D. the flushing action of the urinary tract E. All of the choices are correct 49. Diseases that can be transmitted from one person to another are termed A. symptomatic B. clinical C. acute D. latent E. communicable 50. The natural habitat of a pathogen is referred to as its A. home B. primary inhabitance C. infectious site D. reservoir

Answer 1

46- Answer- E

Explaination- Adhesins are component present present on cell surface (Often tip of pili or fimbria) of bacteria that help in attachment of bacteria to host cell . Adhesins also help to confer specificity of bacterial attachment to specific or particular tissue.

47- Answer- A

Explaination- Until and unless the pathogen not come in contact with the tissue it never establish or replicate within host cell.

48- Answer- E

49- Answer- E

Explaination- Communicable diseases are diseases that are transfered from one person to other by direct or indirect contact with infected person. eg. AIDS, Syphilis, herpes etc

50- Answer- D

Explaination- In ecology reservoir of pathogen is the place or environment where pathogens naturally resides, reproduces and is dependent on it for it's survival. Almost all bacteria have at least one reservoir because it is one of the part of disease cycle.