Introduction 

The bacterium Chlamydia trachomatis is the cause of chlamydia, one of the most spread sexually transmitted illnesses (STIs) in the world.¹ Even though most infected people show no symptoms, if treatment is not received, it can have great health consequences, particularly during pregnancy and childbirth.¹ 

This article will look at the dangers of chlamydia infection spreading from mother to child during childbirth, possible outcomes, and precautions to take.

Transmission and symptoms

Chlamydia is transmitted mainly by sexual contact. It can infect the throat, rectum, and, less frequently, the genital tract. Since many chlamydia patients do not show symptoms, the infection is often shared unintentionally.² 

When symptoms do appear, they may include: 

• Pain during sexual activity 
• Burning when urinating 
• Irregular genital discharge³

Chlamydia in pregnancy

Pregnant women who have chlamydia have special challenges. Both the mother and the unborn child may be affected by the bacteria. Chlamydia can cause problems such as:

• Pelvic inflammatory disease (PID), which is an infection that usually starts in the vagina and spreads to other female reproductive organs 
• Ectopic pregnancy is when the fertilised egg is implanted outside the womb and cannot develop into a baby 
• Infertility in females if treatment is not received 
• The main worry for expectant mothers is that they can infect the unborn child during childbirth.⁴

Transmission of chlamydia during childbirth

Transmission of chlamydia from mother to baby can occur during vaginal delivery when the baby comes into contact with the bacteria present in the mother's birth canal. This type of transmission is called vertical transmission.⁵ 

The risk of transmission is significant, with estimates suggesting that up to 70% of babies born to mothers with untreated chlamydia may contract the infection.⁵

Risks and consequences for newborns

When a newborn contracts chlamydia after birth, they may experience several health problems, mainly in their eyes and respiratory system. The most common issues consist of:

Neonatal conjunctivitis

Also referred to as ophthalmia neonatorum. This illness is characterised by inflammation of the conjunctiva, the membrane that covers the inside of the eyelid and the white portion of the eyeball.⁶ The first few weeks of life are usually marked by symptoms such as:

• Redness 
• Oedema of eyelid (swelling)
• Discharge from the eyes 

It might cause more serious eye damage or blindness if left unchecked.⁷

Pneumonia

Chlamydia can also cause pneumonia (lung infection) in newborns, typically presenting within the first three months of life. Symptoms include:

• Persistent cough
• Rapid breathing
• Feeding difficulties 

Chlamydial pneumonia can be serious and requires immediate medical treatment to avoid complications.⁸

Diagnosis of chlamydia in pregnant women and newborns

Pregnant women with chlamydia must receive a diagnosis to protect the unborn child. Chlamydia screening is typically performed on expectant mothers during their initial prenatal appointment.⁹ 

A swab of the cervix or a straightforward urine test is used for the screening. Later in the pregnancy, further testing could be advised if the first test comes out negative and if the woman continues to participate in activities that raise her risk of contracting STIs (e.g. having more than one sexual partner).¹⁰

Chlamydia infections in newborns are identified by clinical signs and verified by laboratory testing.¹⁰ Chlamydia trachomatis is tested for in the respiratory secretions from pneumonia cases and conjunctiva swabs from probable conjunctivitis cases.¹¹

Treatment of chlamydia in pregnant women

Treating chlamydia during pregnancy is straightforward and effective. The standard treatment involves antibiotics safe during pregnancy, such as azithromycin or doxycycline.¹² 

The sexual partners of pregnant women need to be treated as well to prevent reinfection.

Preventing transmission during childbirth

Preventing the transmission of chlamydia from mother to her newborn involves several strategies:

Screening and treatment 

• The best preventative approach involves routinely screening expectant mothers for chlamydia and treating any infections that are found early on.¹³ 
• Following therapy, additional testing guarantees the bacteria has been cleared.

Counselling and education

• Pregnant women can help lower the rate of chlamydia and other infections by learning about safe sexual practices, the dangers of STIs, and the value of routine prenatal care.

Caesarean delivery

If the infection is discovered late in pregnancy and there is not enough time for an appropriate course of therapy before delivery, a caesarean section may be considered in some situations to stop vertical transmission. But, in most cases, this is not the first line of defence and is saved for particular situations.¹⁴

Managing chlamydia infections in newborns

Early detection and treatment of chlamydia in newborns is very important in avoiding catastrophic consequences. Neonatal chlamydial infections are usually treated with an antibiotic regimen, such as azithromycin or erythromycin.¹⁵ 

Topical antibiotics can be used in addition to oral therapy for conjunctivitis.¹⁵

The long-term outlook for affected newborns

Most newborns with chlamydia infections recover completely without any long-term effects when treated promptly and effectively.² However, delaying the diagnosis and treatment might result in more serious complications, highlighting the significance of speedy action.

Research and advancements

Understanding chlamydia and its effects on pregnancy and babies is being improved by ongoing studies. Areas of interest consist of:

Vaccine development

Research is being done to create a vaccine against Chlamydia trachomatis, which might lower the number of infections and the spread of its diseases greatly.¹⁶

Improved screening techniques

Developments in diagnostic technologies could result in quicker and more accurate chlamydia testing, which would allow for improved screening and early detection, especially in asymptomatic people (people who are infected but show no signs or symptoms).

Antibiotic resistance monitoring 

As with many bacterial diseases, it's important to keep an eye out for signs of antibiotic resistance to make sure that present treatments continue to work and, if the resistance becomes a serious problem, it is suggested to create new treatment plans. 

Public health strategies

Initiatives related to public health are essential for stopping chlamydia spread and safeguarding the health of expectant mothers and newborns. Important tactics consist of:

Education campaigns

People can be taught about the dangers of chlamydia, the value of safe sexual behaviour, and the necessity of routine STI testing through public awareness campaigns. 

Access to healthcare

Reducing the spread of chlamydia requires making sure that everyone, especially those living in underprivileged areas, has access to cheap, private STI testing and treatment.

Policy and guidelines

The issue can be addressed on several fronts by creating and putting into practice guidelines for routine chlamydia screening in expectant mothers and sexual health education in schools.

The role of healthcare providers 

When it comes to treating chlamydia during pregnancy and preventing transmission to unborn children, healthcare professionals are essential.¹⁷ Among their duties are:

• Testing and Screening: routinely screen for STIs, including chlamydia, especially in high-risk populations.
• Patient education: educating patients about sexually transmitted infections (STIs), their risks, and the value of treatment and prevention.
• Treatment and Follow-Up: Ensure that chlamydia patients who are pregnant receive the proper care and additional testing to verify that the infection has been cleared.
• Coordination of Care: effective management of chlamydia cases in infants involves collaboration with other medical specialists, including paediatricians and infectious disease specialists.

Conclusion

Chlamydia is a common but often overlooked STI that has significant risks to pregnant women and their newborns. Transmission during childbirth can lead to serious health issues for the baby, including neonatal conjunctivitis and pneumonia. However, with routine screening, timely treatment, and preventive measures, the risks can be significantly reduced.

Public health initiatives, education, and access to healthcare are necessary in controlling the spread of chlamydia and protecting maternal and newborn health. Healthcare providers play a key role in this effort, from screening and treatment to education and follow-up care.

Ultimately, continued research and advancements in diagnostic and treatment methods hold promise for further reducing the impact of chlamydia on pregnant women and newborns. By staying informed and proactive, we can ensure better health outcomes for mothers and their babies, minimising the risks associated with this common infection.