In June 323 BC, the most powerful man in the world lay on his bed in Babylon, unable to move a single muscle. Whilst his generals fought over the empire at his feet, Alexander the Great remained conscious but trapped within his own body.
The most astonishing thing happened next: despite being declared dead, he showed no signs of decomposition for six days. What his contemporaries called ‘divine nature’ is today, for modern science, a key clinical clue: Alexander was probably not dead, but suffering from total paralysis caused by a bacterium that is still very much present among us today: Campylobacter jejuni.
‘Molecular Mimicry’: The Trojan Horse of the immune system
Dr Katherine Hall’s hypothesis suggests that Alexander contracted a C. jejuni infection following a royal banquet, which led to Guillain-Barré syndrome (GBS).
The Campylobacter bacterium has a molecular structure that ‘mimics’ human nerves. When Alexander’s immune system attempted to fight the infection, it ended up mistakenly attacking his own peripheral nervous system. This attack caused ascending flaccid paralysis: he visibly lost the ability to speak and breathe, which may have led doctors of the time to misdiagnose him as being dead (known as pseudothanatos).
Today, although sanitary conditions and food practices have improved exponentially, Campylobacter remains the most common cause of bacterial gastroenteritis worldwide and the main precursor to GBS.
Campylobacter in the 21st Century: Symptoms and risks
Nowadays, the infection (campylobacteriosis) is usually less dramatic than it was in the case of the Macedonian conqueror, but no less serious. Current symptoms include:
- Diarrhoea (often bloody).
- Severe abdominal pain and cramps.
- Fever and general malaise.
- Nausea and vomiting.
- Headache.
Although most people recover, complications can be serious. In addition to the aforementioned Guillain-Barré syndrome, which affects 0.001% of patients infected with the bacterium, reactive arthritis or systemic infections may occur in vulnerable patients.
The Diagnostic Challenge: Why is time so important?
To prevent serious outcomes, rapid detection is essential. Historically, stool culture has been the ‘gold standard’. However, this method has critical limitations in current clinical practice:
- Bacterial fragility: Campylobacter is microaerophilic; it requires very specific oxygen conditions (5–10%) to survive outside the body.
- Slowness: Culture requires incubation at 42°C and can take several days to provide a definitive result.
- Variable sensitivity: If the patient has taken antibiotics or the sample is not processed immediately, the culture often yields false negatives.
The Rapid Test Revolution (CIDT) versus culture
This is where Culture-Independent Diagnostic Testing (CIDT) technology, such as immunoassays (EIA), makes the competitive difference in the modern laboratory:
- Speed of response: Whilst culture takes days, rapid antigen tests can provide results on the same day, enabling immediate clinical intervention.
- Sensitivity: Today, rapid tests offer predictive sensitivities of between 90 and 100% compared to culture.
- Logistical simplicity: Unlike culture, these tests do not require keeping the bacteria alive in controlled carbon dioxide atmospheres, which reduces pre-analytical error.
- They help raise the alarm to control potential community outbreaks.
If Alexander the Great had had a rapid test on the plains of Babylon, perhaps his doctors could have identified the bacteria before paralysis took hold of him. Today, the advantage of rapid diagnosis is neither merely historical nor hypothetical; it is the tool that enables healthcare professionals to act with precision, preventing a common infection from becoming a tragedy of legendary proportions.
Speed in the laboratory saves lives. Optimise your enteric detection protocols with our rapid diagnostic solution for the detection of Campylobacter.
