MYTUTOR SUBJECT ANSWERS

853 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

264 SUBJECT SPECIALISTS

£26 /hr

Helen M.

Degree: Medicine (Bachelors) - Queen's, Belfast University

Subjects offered:Biology, Maths+ 6 more

Biology
Maths
Chemistry
Business Studies
.UKCAT.
.LNAT.
-Personal Statements-
-Medical School Preparation-

“Durham law graduate and current first year medical student with four years tutoring experience.”

£24 /hr

Ed W.

Degree: Medicine (Bachelors) - Edinburgh University

Subjects offered:Biology, Maths+ 3 more

Biology
Maths
Further Mathematics
Chemistry
-Medical School Preparation-

“Hi! I'm Ed and I'm currently studying Medicine at the University of Edinburgh. I tutor at GCSE and A Level forBiology, Chemistry and Maths, and at GCSE level forFurther Maths. These are subjects I'm very comfortable in and enjoy. With ...”

£20 /hr

Francesco D.

Degree: Medicine (Bachelors) - Oxford, Merton College University

Subjects offered:Biology, Maths+ 6 more

Biology
Maths
Human Biology
Chemistry
.BMAT (BioMedical Admissions)
-Personal Statements-
-Oxbridge Preparation-
-Medical School Preparation-

“I'm a second year medical student at Oxford University. Tutorials are fun, productive and tailored to you!”

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's the difference between mitosis and meiosis?

What are the main components and properties of a plasma membrane?

A plant community on an extinct volcano displays the process of succession. Explain why there would be very few species at the end of the eruptive life cycle of the volcano and why rate of new species introduction would rapidly increase afterwards.

What are the main differences between eukaryotes and prokaryotes?

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