MYTUTOR SUBJECT ANSWERS

673 views

How does an invading pathogen cause disease?

There are three main ways that an invading pathogen can result in disease:

 

Damage or destroy host cells

This is host specific and ligands on the pathogen must fit host receptor proteins on the host cell. This is commonly seen in viral infections as the virus takes over cells to be able to function.  An example of this is seen in HIV infection. HIV invades and destroys a type of T cell (white blood cell), resulting in an immunocompromised patient (low immune system).

 

Produce toxins

Some bacteria/viruses produce toxins, which result in damage to the host.

An example of this is Vibrio cholerae which release harmful exotoxins that destroys chloride and hydrogencarbonate ions.

 

Overt immune response

Sometimes the body produces an inflammatory response, which results in damage to cells.  During infection with Mycobacterium turberculosis , the body tries to destroy the bacteria with a proinflammatory response this causes damage to cells in the lungs leaving cavities in the lung and sometimes blood vessels.

 

Some bacteria may cause disease using all 3 methods, the ability for a bacteria/virus to do this relies on its location, specificity and pathogenicity. 

Jenny C. Uni Admissions Test -Personal Statements- tutor, GCSE Biolog...

2 years ago

Answered by Jenny, an A Level Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

178 SUBJECT SPECIALISTS

£24 /hr

Abigail C.

Degree: Biochemistry (Bachelors) - Bath University

Subjects offered:Biology

Biology

“I am a Biochemistry student at the University of Bath. I have a great passion for biology and love explaining concepts in a fun way with images and diagrams. ”

£22 /hr

Upasana T.

Degree: Medicine (Bachelors) - Birmingham University

Subjects offered:Biology, Maths+ 1 more

Biology
Maths
Latin

“About me: Hi, my name is Upasana Topiwala and I am currently in my third year of medical school at the university of Birmingham. I've taken up tutoring in order to inspire my students to appreciate the importance of science in our liv...”

£30 /hr

Jessica-Lily H.

Degree: MRes Experimental Neuroscience (Masters) - Imperial College London University

Subjects offered:Biology, Psychology

Biology
Psychology

“Top tutor from a world leading university- ready to do all I can to help you get your head around that tricky subject!”

About the author

£24 /hr

Jenny C.

Degree: Clinical infection,microbiology and immunity (Doctorate) - Liverpool University

Subjects offered:Biology, Maths+ 1 more

Biology
Maths
Chemistry

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

MyTutor guarantee

You may also like...

Other A Level Biology questions

What are the events in the cardiac cycle?

What is mRNA?

What are the four chambers of the heart and what do they do?

How do I approach the 8-10 mark questions on a paper?

View A Level Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok