Men's Health Education: A Comprehensive Analysis of Gonorrhea's Sources of Infection, Clinical Symptoms, and Dangers

Gonorrhea

Gonorrhea is a sexually transmitted disease caused by Neisseria gonorrhoeae. It is primarily transmitted through sexual contact, with gonococcal urethritis being the most common manifestation. Infection with Neisseria gonorrhoeae can also lead to gonococcal conjunctivitis, pharyngeal gonorrhea, rectal gonorrhea, gonococcal arthritis, and gonococcal dermatitis.

(I) Characteristics of Neisseria gonorrhoeae

Neisseria gonorrhoeae are Gram-negative cocci, with a bacterial size of approximately 0.6–0.8 μm. They are relatively delicate and thrive in moist environments with temperatures between 35 and 36°C, with an optimal pH of 7.5 for growth. Gonorrhea has poor resistance to external physical and chemical factors and does not easily survive in dry, cold environments. It can survive for 13 hours at 39°C and only 5 minutes at 50°C. Gonorrhea bacteria attached to clothing and bedding can survive for 18–24 hours, and for several days on thick layers of pus or moist objects. At room temperature, gonococci generally die within 1–2 days. Under a light microscope, the morphology of gonococci is not easily distinguishable from other Gram-negative diplococci, but they can be differentiated using biochemical or immunological methods.

(II) Source of Infection

Humans are the only natural host for gonococci; therefore, gonorrhea patients are the main source of infection. Not only do symptomatic gonorrhea patients infect their partners through sexual contact, but asymptomatic patients can also transmit the disease. Clinically, 5%–20% of male and over 60% of female infections are asymptomatic, which is of significant epidemiological importance. In addition, some patients with acute gonorrhea may experience a recurrence of symptoms after treatment due to incomplete or irregular treatment, alcohol abuse, or continued sexual activity during the illness. However, latent gonococci may remain, or posterior urethritis may have developed. Given the opportunity, symptoms may reappear, transmitting the gonococci to the other party. These asymptomatic cases warrant attention.

(III) Transmission Routes

Almost all cases of gonorrhea in adults are transmitted through sexual intercourse. However, contaminated hands, clothing, bedding, and bathtubs also play a role in transmission. This indirect transmission may be significant in women. Gonorrhea in young girls is often transmitted indirectly, such as through contaminated towels, anal thermometers, diapers, bedding, bathtubs, toilet seats, and the hands of caregivers. In Western societies, a very small number of young girls contract gonorrhea due to sexual abuse. Neonatal gonococcal conjunctivitis is mostly caused by contamination of maternal secretions during childbirth. Gonorrhea in pregnant women can cause intra-amniotic infection, including fetal infection. (IV) Clinical Manifestations

Gonorrhea can occur at almost any age, but clinically, it primarily affects sexually active young adults. Currently, the age of onset for gonococcal infection is trending younger. In Western countries, the peak age for men is 20-24 years, and for women, it is 15-19 years.

1. Incubation Period

After entering the urethra, gonococci go through three stages: First, they invade the urethra, requiring 36 hours to penetrate the submucosa and begin growth. Second, they develop, completing a life cycle in approximately 36 hours after establishing a colony. Third, they shed toxins, causing tissue reactions and the onset of clinical symptoms.

Generally, clinical symptoms appear 72 hours after infection. However, factors such as physical weakness, excessive sexual activity, and alcoholism can shorten the incubation period, while the widespread use of antibiotics can prolong it. Therefore, the incubation period can be 2–10 days, with an average of 3–5 days. Since the advent of antibiotics, the incubation period of gonorrhea has gradually lengthened with their use.

2. Symptoms and Signs

Acute gonorrhea has a basic process of occurrence, development, and transformation.

① Redness, swelling, itching, and mild tingling at the urethral opening, followed by a thin, mucous discharge, causing discomfort during urination. Symptoms worsen after 24 hours.

② Dysuria appears, often the chief complaint of patients seeking medical attention. Its characteristic is stinging or burning pain at the urethral opening at the beginning of urination, which lessens after urination is complete. In severe cases, pain is felt when the glans penis touches underwear, and a bent-over posture is often adopted when walking.

③ Purulent discharge from the urethra, initially serous, gradually becomes a thick, yellowish purulent or bloody discharge that can flow out spontaneously, staining underwear. Sometimes, the pus accumulates in a hemispherical shape at the urethral opening, especially noticeable upon waking in the morning. Sometimes, crusts of pus may block the urethral opening. Urine is milky white and cloudy, more pronounced in the first urination. If the patient has phimosis, it can cause balanitis and posthitis.

④ In severe cases, the urethral mucosa may evert, and the inguinal lymph nodes may also become infected, causing redness, swelling, pain, and even suppuration.

⑤ Some patients experience urinary frequency, urgency, and nocturia. When the lesion ascends to the posterior urethra, terminal hematuria, bloody semen, and mild perineal distension may occur. Painful penile erections are common at night.

⑥ Systemic symptoms are generally mild, but some individuals may experience fever around 38°C, general malaise, and loss of appetite. In acute gonorrhea, all symptoms gradually subside after about one week, with the redness and swelling of the glans penis and urethral opening receding, and the discharge becoming thin and mucous or disappearing altogether. Symptoms completely disappear after one month, but a small amount of mucus or adhesion to the urethral opening may remain in the morning. Acute gonorrhea can be cured with proper and thorough treatment. In some patients, due to improper treatment or other reasons, the gonococcus may remain dormant in the deep glands and become chronic.

Chronic gonorrhea often results from improper treatment of acute gonorrhea, alcohol consumption during the acute phase, or sexual intercourse with a partner. Furthermore, in patients with weak constitutions, anemia, or tuberculosis, the disease may present as chronic from the outset. Chronic gonorrhea often involves inflammation of both the anterior and posterior urethra, and easily affects the bulbous and prostatic urethra.

a. Patients experience mild urinary pain, feeling only a burning or mild stinging sensation during urination, and terminal hematuria is common.

b. No purulent discharge is observed at the urethral opening. Squeezing the base of the penis or applying pressure to the perineum with fingers reveals only a small amount of thin, serous discharge from the urethral opening. The urine is generally clear, but gonococcal filaments may be visible floating within it.

c. Patients often experience chronic lower back pain, a feeling of heaviness in the perineum, nocturnal emission, and blood in the semen. A few patients develop neurosis.

d. Prone to complications such as prostatitis and seminal vesiculitis. Before the onset of the disease, patients often experience a sudden cessation or reduction of urethral discharge, followed by systemic symptoms such as high fever and chills, frequent and painful urination, and rectal examination revealing an enlarged and tender prostate. An enlarged and severely tender seminal vesicle can be palpated. If it develops into chronic inflammation, rectal examination reveals a hardened seminal vesicle. If epididymitis develops, the patient presents with low-grade fever, swelling and pain in the epididymis, often unilaterally, with referred pain in the ipsilateral groin and lower abdomen. Palpation reveals a hot, swollen, and severely tender epididymis. Epididymitis can be accompanied by prostatitis and seminal vesiculitis. In rare cases, gonococcal cystitis may occur.

e. Recurrent gonorrhea can lead to urethral stricture, usually total urethral stricture. In a few cases, it can cause vas deferens stricture or obstruction, resulting in seminal vesicle cysts, which may be clinically misdiagnosed as hydrocele, testicular tumors, etc. Vas deferens obstruction can lead to secondary infertility.

3. Gonorrhea in Other Sites

Besides occurring in the urogenital system, gonorrhea can also cause infection in other distant sites through contaminated contact, deviant sexual behavior, or hematogenous dissemination.

① Gonococcal conjunctivitis: An acute purulent conjunctivitis caused by gonococcal contamination, characterized by conjunctival hyperemia and edema, with gradually increasing purulent discharge, sometimes very profuse. The cornea appears cloudy. In severe cases, keratitis can ulcerate, causing perforation and leading to blindness. Clinically, it can be divided into two types: One type is neonatal gonococcal conjunctivitis, mostly caused by contamination from the birth canal of a mother with gonorrhea. Symptoms appear 2-3 days after birth, with a few cases having an incubation period as long as 21 days, and it is mostly bilateral infection. The other type is adult gonococcal conjunctivitis, often caused by secretions from patients with gonococcal urethritis, which contaminate the eyes, and it is mostly unilateral.

② Gonorrhea of ​​the throat (gonococcal pharyngitis): Commonly contracted by those who have oral and genital contact, especially homosexuals. International reports indicate a higher incidence in women. Symptoms include inflammation and discharge in the throat; generally mild symptoms are not highly characteristic.

③ Rectal gonorrhea: Primarily caused by male homosexuals, but can also result from direct extension of lesions in the female genitalia. Mild cases present with itching and burning sensation in the anus, accompanied by mucus and purulent discharge. Severe cases present with tenesmus and copious purulent or bloody discharge.

④ Gonococcal arthritis: A consequence of gonococcal bacteremia. During the bacteremia stage, it can manifest as polyarthritis; after bacteremia, it can become localized large joint arthritis, commonly affecting the knee, elbow, wrist, ankle, and shoulder. It is often accompanied by gonococcal synovitis and gonococcal tenosynovitis. Joint fluid aspiration tests reveal the presence of gonococci, which can lead to bone destruction, fibrosis, and joint ankylosis. Patients exhibit elevated erythrocyte sedimentation rate and increased white blood cell count, but normal uric acid levels.

⑤ Gonococcal perihepatitis: Commonly occurs in female patients with gonococcal pelvic inflammatory disease. When the inflammation extends to the upper abdomen, it causes peritonitis, leading to adhesions between the liver and the abdominal wall. Symptoms include sudden onset of right upper quadrant abdominal pain, which worsens with deep breathing and coughing, accompanied by fever, nausea, and even vomiting. Palpation reveals significant tenderness in the right upper quadrant, and chest X-ray shows a small amount of pleural effusion on the right side. It is sometimes misdiagnosed as acute cholecystitis, pleurisy, subdiaphragmatic abscess, or perforated gastric ulcer.

⑥ Gonococcal dermatitis: Mostly caused by contamination of the skin with secretions from gonococcal urethritis, commonly occurring in the coronal sulcus, penile shaft, and perineum, and occasionally outside the genitals or when the doctor's hands are contaminated during examination. Lesions begin as round or oval erythematous patches, later developing into vesicles, pustules, or erosions surrounded by a red halo. Gonorrhea can be detected in the lesions.

⑦ Gonococcal sepsis: A systemic gonococcal disease caused by the hematogenous dissemination of gonococci from the urogenital tract or pharynx. Patients are mostly women, often developing the condition during menstruation or pregnancy. Gonococcal sepsis is a serious condition that can be life-threatening if left untreated. Once sepsis develops, symptoms may include intermittent fever, chills, and joint pain, often accompanied by rashes on the extremities and near joints. Gonococcal sepsis can be complicated by various serious complications such as meningitis, endocarditis, pericarditis, hepatitis, peritonitis, and pneumonia.