An infected computer can be controlled by the attacker and directed to carry out functions normally available only to the system owner.

It encrypts files on an infected computer and then demands the owner pays $300 in ransom for a decryption password.

An anti-virus software package will detect a malware programme but a single infected computer can slip through the net.

Bitcoin accounts linked to the attackers, who demanded $300 to unlock each infected computer, are being monitored and have so far received $42,000 from 110 different sources.

The worm was also designed so that it would be erased when an infected computer was shut down, thus preventing multiple infections from becoming problematic.

Pycnidia, the anamorphic fruiting body, will form in the infected tissue and release two types of conidia alpha and beta.

Because it provides the best opportunity for cure, complete excision of infected tissue should be pursued whenever possible.

The infected tissue become as an ashen-grey powdery and if the palm remains standing, the infected trunk rapidly become hollow.

The isolation of enzymes from infected tissue can also provide the basis of a biochemical diagnosis of an infectious disease.

Granulomas form in the infected tissue and undergo necrosis in the centre.

After six weeks in hospital she was diagnosed with necrotising fasciitis, known as flesh-eating disease, which can be caused by an infected wound.

It had to be surgically removed from the infected wound.

He had surgery on the infected wound.

He had been a diabetic for 11 years and succumbed to the effects of an infected wound that had not healed for two months.

Some had been imprisoned for three years and their bodies showed signs of scars, electrical burns and infected wounds.

They vary according to the previous immune status of the sheep (enzootic or newly infected country).

The number of newly infected people per year, however, has increased by over 50 percent, from 99,000 in 2001 to 150,000 in 2011.

Initially, tips of newly infected plants start yellow and dry followed by softening of the neck of the plans that eventually fall over.

However, it has since steadily declined with the development and availability of antiretroviral therapies and fewer newly infected patients.

The number of newly infected people per year increased slightly, from 140,000 in 2001 to 150,000 in 2011.

That has led to calls for a catch-all rule to consider all patients potentially infected.

It's estimated these people could have potentially infected 50,000 contacts.

The government has advised transport operators to stay at least two metres away from any potentially infected travellers.

Among the treats extracted from passengers in this startling documentary are dried snakes, beetles and 'potentially infected' coffee.

The memo, obtained by this newspaper, approved the use of plasma from potentially infected blood in treatments for haemophiliacs - but banned the use of the blood for other procedures.