Continuing Education Activity
Gonococcal conjunctivitis (GC), also known as gonococcal ophthalmia neonatorum in newborns, is an eye infection caused by the bacterium Neisseria gonorrhea. This condition occurs when the eyes come into contact with infected genital secretions. Physical examination typically reveals conjunctival chemosis, discharge, tenderness, eyelid edema, and preauricular lymphadenopathy. Although the global incidence of GC in newborns is under 1%, it remains a serious condition that can lead to complications like blindness or systemic infections, including meningitis, if left untreated. Fortunately, GC is preventable mainly through appropriate prenatal screening and chemoprophylaxis.
Through this course, participants gain a comprehensive understanding of the evaluation and treatment of gonococcal conjunctivitis. The course emphasizes the importance of early diagnosis and effective treatment strategies. Also highlighted is the value of interprofessional collaboration, which improves outcomes by ensuring coordinated care. By integrating the expertise of obstetricians, pediatricians, ophthalmologists, and nurses, patients benefit from timely interventions that can prevent severe complications and promote recovery.
Objectives:
Identify the clinical signs and symptoms of gonococcal conjunctivitis, including conjunctival chemosis, discharge, and eyelid edema.
Determine the importance of culture on Thayer-Martin media for the evaluation of gonococcal conjunctivitis.
Differentiate gonococcal conjunctivitis from other causes of neonatal conjunctivitis to ensure accurate diagnosis and timely treatment.
Communicate the importance of improving care coordination among interprofessional team members to improve outcomes for patients with gonococcal conjunctivitis.
Access free multiple choice questions on this topic.
Introduction
While typically thought of as a disease in neonates, gonococcal conjunctivitis (GC) is an infectious process that has also become an increasing issue in other age groups. When it occurs in neonates, GC is also known as gonococcal ophthalmia neonatorum and is most likely due to maternal transmission during birth. In older age groups, GC is more associated with sexually transmitted infections but can also present without evidence of concomitant genital infection. The condition is important to recognize as untreated cases can lead to significant life-threatening conditions like meningitis and/or severe consequences for patients, for example, blindness.[1][2][3][4]
Etiology
GC is due to ophthalmic infection with Neisseria gonorrhoeae, a gram-negative diplococcus. In neonates, the transmission of N gonorrhoeae and subsequent development of GC often occur during delivery and exposure to infectious vaginal secretions. This occurs because the mucosa of the cervix and urethra of infected mothers can act as bacterial reservoirs. Even with delivery via cesarean section, vertical transmission of N gonorrhoeae is still possible. Approximately 10% of neonates exposed to gonorrheal exudates during delivery may go on to develop GC, even with appropriate prophylaxis. In populations other than neonates, transmission can occur via direct sexual contact with infective secretions or indirectly, for example, via manual or fomite transmission. However, this is thought to be less likely since N gonorrhea does not typically survive more than a few minutes outside the human body. There has also been evidence that suggests that GC could potentially be due to different strains of gonococci that are not associated with sexually transmitted infections.[5][6][7]
Epidemiology
Worldwide, the incidence of gonococcal infection in newborns is less than 1%. Developed countries tend to have lower incidences due to the availability of screening and treatment options. Rates in developing countries are likely to be significantly higher, considering the prevalence of gonococcal infection in pregnancy nears 5% in some parts of Africa. In the United States, the incidence of conjunctivitis ranges from 1% to 2% in neonates, with the incidence of neonatal GC estimated to be less than 1%. As mentioned previously, in neonates receiving appropriate chemoprophylaxis, up to 10% may still develop GC, compared with up to 48% in those who do not. In the non-neonatal populations, GC is rare. In the United States, sexually transmitted infection surveillance estimates nearly 146 cases of gonorrhea per 100,000 population, but specific estimates of GC have not been well-studied. However, results from a recent study in Ireland estimated that the prevalence of GC was 0.19 cases per 1000 patients evaluated for eye emergencie,s with the majority presenting in young adult males.
Pathophysiology
The main concept is that N gonorrhoeae can attach to and penetrate the epithelial cells of mucosal surfaces such as the conjunctiva. Once inside, the bacteria can proliferate and induce pro-inflammatory mechanisms. However, there is evidence that N gonorrhoeae has developed methods for evading and even modulating immune responses, which can potentially lead to disseminated infection, for example, bacteremia or meningitis.
History and Physical
Neonatal GC is often acquired during delivery; thus, there usually is a history of suspected or confirmed maternal gonorrheal infection. Bacterial conjunctivitis can occur at any time, but GC is considered in symptomatic neonates after the first day of life, specifically days 2 to 5, since chemical conjunctivitis (secondary to silver nitrate or antibiotic drops) is often the cause in the first 24 hours. A physical exam may reveal the following:
Conjunctival injection, chemosis
Edema of the eyelids
Mucopurulent discharge
Tenderness of the globe
Lymphadenopathy, preauricular
In the non-neonatal population, GC may present with similar symptoms and should at least be considered in sexually active individuals who present with conjunctivitis with or without genital symptoms. Regardless, a detailed sexual history of the mother and non-neonatal cases of conjunctivitis should be obtained to refine the differential diagnoses for conjunctivitis.
Evaluation
For patients presenting with conjunctivitis concerning possible GC, further diagnostics are suggested to confirm the diagnosis. A sampling of conjunctival scrapings or exudative fluid can be sent for the following:
Gram stains are helpful because they may reveal intracellular Gram-negative diplococci.
Culture on Thayer-Martin media or chocolate agar for N gonorrhoeae and blood agar for non-gonococcal species is recommended.
Polymerase chain reaction can also be used to test for N gonorrhoeae as well as Chlamydia trachomatis.
Screening for other sexually transmitted infections, such as the human immunodeficiency virus, is also recommended in mothers and non-neonatal cases due to co-infections that can occur with sexually transmitted infections.
Consideration should also be given to taking genital and throat swabs in patients with risk factors.
Treatment / Management
Due to the progression risk of disseminated gonococcal infection, neonates with GC should be approached as emergent cases that warrant admission and observation. The most effective treatment of GC is prevention, and it is recommended that females be screened for gonorrhea and other sexually transmitted infections if considered high-risk (prior history of sexually transmitted infection, commercial sex workers), and should be appropriately treated. Nevertheless, cases of neonatal GC can occur even with appropriate prophylactic measures. Below is a summary of the recommended therapies.[8][9][10][11]
Neonatal Prophylaxis
Symptomatic or High-Risk Neonate
Ceftriaxone (25 mg/k to 50 mg/kg, max 125 mg intravenously (IV) or intramuscularly (IM), single dose, or
Cefotaxime (100 mg/kg IV/IM), single dose, which may be preferred if available, due to the risk of increasing bilirubin levels associated with ceftriaxone
Hourly saline lavage
Non-Neonate With Symptoms
Ceftriaxone (1 gm IM), single dose, and
Azithromycin (1 gm oral), single dose, which is added on due to the frequent co-infection with Chlamydia trachomatis
Saline lavage can be considered, but it is not a necessity.
Differential Diagnosis
Differential diagnosis to consider and rule out regarding gonococcal conjunctivitis includes the following:
Adult blepharitis
Allergic conjunctivitis
Acute angle-closure glaucoma
Chemical burns
Contact lens conjunctivitis
Dry eyes
Epidemic keratoconjunctivitis
Episcleritis
Iritis and uveitis
Pharyngoconjunctivital fever
Scleritis
Squamous cell carcinoma
Subconjunctival hematoma
Pearls and Other Issues
GC is a disease process that should not be dismissed. Untreated cases can result in severe complications, such as vision loss, if the bacteria penetrate further and cause corneal ulceration and scarring. A timely ophthalmology consultation is warranted due to the significant risks to the patient’s vision. Providers should also be aware of the risks of systemic infection, which may present as septic arthritis, meningitis, or septicemia. Furthermore, attention should be paid to appropriate treatment, as fluoroquinolone resistance has become a growing issue, which is part of the reason cephalosporins have become the mainstay of gonococcal treatment.
Enhancing Healthcare Team Outcomes
Gonococcal conjunctivitis is a serious illness best managed by an interprofessional team. Untreated cases can result in severe complications, such as vision loss, if the bacteria penetrate further and cause corneal ulceration and scarring. A timely ophthalmology consultation is warranted due to the significant risks to the patient’s vision. Clinicians should also be aware of the risks of systemic infection, which may present as septic arthritis, meningitis, or septicemia. Furthermore, attention should be paid to appropriate treatment, as fluoroquinolone resistance has become a growing issue, which is part of the reason cephalosporins have become the mainstay of gonococcal treatment. Following treatment, most infants have good outcomes.[12]
References
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Disclosure: John Costumbrado declares no relevant financial relationships with ineligible companies.
Disclosure: Daniel Ng declares no relevant financial relationships with ineligible companies.
Disclosure: Sassan Ghassemzadeh declares no relevant financial relationships with ineligible companies.
