91av

Skip to content

2009 Margaret Williams, PhD; Claressa Lucas, PhD;Tatiana Travis, BS Under a moderately-high magnification of 6500X, this colorized scanning electron micrograph (SEM) depicted a grouping of Gram-negative Legionella pneumophila bacteria. Please see PHIL 11092 through 11140 for additional SEMs of these organisms, specifically PHIL 11121 for a black and white version of this image. You?ll note that a number of these bacteria seem to display an elongated-rod morphology. L. pneumophila are known to most frequently exhibit this configuration when grown in broth, however, they can also elongate when plate-grown cells age, as it was in this case, especially when they?ve been refrigerated. The usual L. pneumophila morphology consists of stout, ?fat? bacilli, which is the case for the vast majority of the organisms depicted here. These bacteria originated on a 1 week-old culture plate (+/- 1 day), which had incubated a single colony, at 37?C upon a buffered charcoal yeast extract (BCYE) medium with no antibiotics.

Health

Legionnaires’ disease may be cause of mystery pneumonia in Argentina

Lab tests suggest that Legionella bacteria are involved in an 11-person outbreak of unexplained pneumonia cases at a private medical clinic in Tucumán

News

A child with symptoms of hand, foot and mouth disease

Health

A common childhood illness could be behind 'tomato flu' outbreak

News

UK schools are teaching teenagers about mental health in the wrong way

Mind

UK schools are teaching teenagers about mental health in the wrong way

Comment

An artificial intelligence that analyses the microbiome and then recommends personalised diets may relieve chronic constipation more effectively that the standard treatment

Health

AI that recommends diets based on the microbiome relieves constipation

News

group of people standing very close - one person looking up

Humans

Am I Normal? review: Deep-dive sets us straight on our need for norms

Culture

Illustration of woman sat on musical scale notation

Health

The power of quiet: The mental and physical health benefits of silence

Features

Bronchiolitis is most commonly caused by the respiratory syncytial virus (RSV)

Health

RSV vaccine that may protect against bronchiolitis has promise in mice

News

Detaching the bioadhesive ultrasound device from the skin

Technology

Ultrasound stickers could continuously image internal organs for days

News

Access to nature needs to be a right, not a privilege

Humans

Access to nature needs to be a right, not a privilege

Comment

Daydreaming has a dark side – is your fantasising holding you back?

Mind

Daydreaming has a dark side – is your fantasising holding you back?

Mind wandering can boost creativity and memory, but it can also damage your mental health. Now we are learning to recognise the dangers of maladaptive daydreaming

Features

Health

Air pollution likely to be causing dementia, say UK science advisers

News

Mind

Why spending time near water gives us a powerful mental health boost

Features

Health

We really can become ‘hangry’, suggests first real-world test of idea

News

Health

Brain electrodes may be a long-lasting aid for severe depression

News