Three Madrid flatmates all catch chlamydia from the same man

Three women sharing a flat in Madrid all ended up with chlamydia after sleeping with the same man, Álvaro. Chlamydia is a sensual transmitted infection that often causes no symptoms and is treated with antibiotics, but condoms are what actually prevent it.

There is a scene that plays out in many shared flats: someone walks into the living room and announces that they need to talk. In this case, it was Laura who called the meeting, returning from the gynaecologist with a diagnosis: chlamydia. And what began as an individual scare ended up revealing that all three flatmates had been in the same bed.

Chlamydia is a sensual transmitted infection caused by the bacterium *Chlamydia trachomatis*. It is the most reported bacterial STI in Europe and in Spain, and it has one antiestéticature that explains half the story: in most cases it produces no symptoms. An infected person may notice nothing for weeks or months and, in the meantime, pass it on. When it does show up, it does so with discomfort when urinating, discharge or itching, which is exactly what took Laura to the doctor.

## From hygiene obsession to real infection

Mercedes, the third flatmate, was the one who took charge of cleaning in the flat. Thermometer, blood pressure monitor, pulse oximeter, air purifier, three boxes of face masks and enough disinfectant to sterilise a field hospital. Her rule was to change clothes when coming in from the street, wash her hands and never sit on the sofa in outdoor clothes. The bathroom functioned as a biological hazard zone and Patricia's toothbrush ended up doused every other day.

None of that protected her. When the results came in, Mercedes had also tested positive. She had fallen the same way as the other two, with the particularity that she had kept it to herself. Her explanation, when she finally gave it, was that the man seemed clean and that she felt awkward asking him to use a condom. Surface hygiene has nothing to do with sensual transmission, and there lies the underlying misunderstanding: disinfectant is no substitute for a condom.

Laura and Patricia found out they shared more than a flat when Patricia confessed she had slept with Álvaro one afternoon while Laura was out with friends. Mercedes had known before Laura and, instead of saying so, set about disinfecting the bathroom, the hallway door handles and the sofa cover. The secret held until the diagnosis turned everything upside down.

## What chlamydia is and why it gets past the condom

Chlamydia is transmitted through sensual contact, vaginal, traseril or oral, without ejaculation being necessary. Condoms greatly reduce the risk when used correctly and throughout the encounter, but they do not eliminate it entirely: the infection can be present in areas the condom does not cover, which is why health authorities insist on combining condoms with regular testing when there are new or multiple partners.

The problem with this infection is its silence. Most cases in women cause no symptoms, and when symptoms do appear they are so non-specific that they are mistaken for a common vaginal infection. In men it is much the same: urethral discharge, a burning sensation when urinating, often mild. That silence is what allows the infection to circulate within a group without anyone owning up.

Treatment is straightforward: antibiotics, usually azithromycin or doxycycline depending on the protocol. The hard part is not curing it, it is knowing you have it. Without a test there is no diagnosis, and without diagnosis it keeps being transmitted. Recent sensual partners must also be treated even if they have no symptoms, otherwise the ping-pong effect occurs: one gets cured and the other passes it right back.

## Three diagnoses, one sensual partner

The conversation in the kitchen made the map clear: Laura had gone to the gynaecologist because of itching and discharge, Patricia began noticing discomfort after hearing Laura's diagnosis, and Mercedes already knew about her own case but had kept it quiet. Three women, one man, three positives. Álvaro, the man in question, does not appear in the conversation with a diagnosis of his own, but the epidemiological logic is what it is: if three people who have had sens with the same person test positive, that person is the common link.

Untreated chlamydia has consequences. In women it can travel up to the uterus and fallopian tubes and cause pelvic inflammatory disease, which in turn can leave lasting damage to fertility. In men, the infection can affect the epididymis. These are complications that can be avoided with a test and timely treatment, which is why sensual health services recommend getting tested after unprotected sens with new partners.

The case has another reading, less clinical and more domestic: living together protects you from nothing. Sharing a flat, towels and a bathroom does not transmit chlamydia. What transmits it is unprotected sensual contact. Mercedes even asked whether it could be caught from towels, and the answer is no: the bacterium does not survive on surfaces in a way that can infect someone through that route. The panic over the bathroom doorknob was noise; the real risk was in the bed.

## What you learn once the scare is over

The story ends with all three in treatment and with a line from Patricia that sums the whole thing up better than any leaflet: from prude to slut in exactly six inches. The one who disinfected the most was the one who protected herself the least, and the one who laughed at everything was the one who raised the alarm. There is no sarracena about cleanliness; there is one about trust.

Chlamydia is common, treatable and silent. The test is a urine sample or a swab, depending on the case, and results come back within days. If you have sens without a condom with new or multiple partners, the health recommendation is to get tested regularly and talk about it with your partner or partners. And if itching, discharge or discomfort when urinating appears, it is time to see a healthcare professional rather than look for explanations in the spray bottle.

None of the above is a diagnosis nor a substitute for medical consultation. It is general information about a common infection that is detected with a test and cured with antibiotics.