Bacterial diseases Flashcards – AQA GCSE Combined Science: Trilogy (8464) — Biology — Foundation

What are pathogenic bacteria?

Single-celled microorganisms that can infect a host.

How do pathogenic bacteria multiply?

Rapidly, by cell division.

What are bacterial toxins, and what effects do they have on a host?

Poisonous substances that damage host tissues and contribute to illness symptoms.

Besides producing toxins, how can bacterial populations harm a host?

Through their multiplication.

How is Salmonella food poisoning spread?

By eating food contaminated with Salmonella bacteria, including food prepared in unhygienic conditions.

What causes the symptoms of Salmonella food poisoning?

The bacteria and the toxins they secrete.

What are four symptoms of Salmonella food poisoning?

Fever, abdominal cramps, vomiting and diarrhoea.

How is the spread of Salmonella controlled in poultry in the UK?

Poultry are vaccinated.

What type of disease is gonorrhoea, and how is it transmitted?

A bacterial sexually transmitted disease spread through sexual contact.

What are two symptoms of gonorrhoea?

• A thick yellow or green discharge from the vagina or penis
• Pain when urinating

Why is penicillin no longer an easy treatment for many cases of gonorrhoea?

Many bacterial strains have become resistant to penicillin.

What two measures can control the spread of gonorrhoea?

Treatment with appropriate antibiotics and use of a barrier method of contraception, such as a condom.