Diagnostic Assessment — Chlamydial Urethritis
Example 1 of 1 · fictitious patient (Veteran CN)
Diagnostic Assessment
Chlamydial Urethritis
No Statement of Principles applies to this condition (non-SOP claim).
ADF History
Veteran CN, date of birth 11 September 1990, Royal Australian Navy, Boatswain's Mate, enlisted 15 January 2009, discharged at his own request 03 March 2017. Operational service: Middle East Area of Operations (maritime security operations aboard a frigate), 20 February 2013 to 30 August 2013 (warlike).
Occupational History
As a boatswain's mate the veteran worked on the upper deck, in boats and on boarding parties, with long watches and extended periods at sea. Sailors on deployment lived in crowded mess decks with mixed-gender crews, and port visits for rest and recreation after weeks at sea were associated with heavy drinking and casual sexual contact, including with commercial sex workers in ports with a high prevalence of sexually transmitted infections.
Health care at sea was provided by a ship's medical officer and medical sailors with a limited pharmacy and no on-board laboratory testing for sexually transmitted infections. Samples had to be sent ashore, results took days to weeks, partner notification in foreign ports was not possible, and resupply of medications depended on the ship's program.
History
Veteran CN, a 22-year-old boatswain's mate in the Royal Australian Navy, developed chlamydial urethritis on 26 May 2013 while on warlike service aboard a frigate in the Middle East, after unprotected sexual contact during port visits and with a crew member later confirmed to have chlamydial infection, and three weeks after gonococcal urethritis treated without anti-chlamydial cover. The condition worsened with right epididymo-orchitis on 12 June 2013 after his antibiotic course was interrupted by a pharmacy shortage and his partner could not be treated.
Timeline
- 15 Jan 2009 — The veteran enlisted in the Royal Australian Navy aged 18. The entry medical examination recorded no history of sexually transmitted infection, normal genitourinary examination and no chronic illness. "fit, no STI history"
- 05 May 2013 — On warlike service in the Middle East, six days after a four-day port visit, the veteran presented to the ship's medical officer with purulent urethral discharge and dysuria. He reported unprotected vaginal intercourse with two casual partners, one a commercial sex worker, during the port visit from 25 to 29 April 2013, while intoxicated after drinking about 15 standard drinks a night. Gram stain of the discharge showed Gram-negative intracellular diplococci and gonococcal urethritis was diagnosed. He was treated with ceftriaxone alone, as the ship had no azithromycin or doxycycline in stock, and the chlamydia test sample sent ashore was lost in transit. "gonococcal urethritis, ceftriaxone only"
- 12 May 2013 — At review one week after ceftriaxone, during the second port visit, the medical officer recorded that the purulent discharge and dysuria had resolved and that the urethral meatus was normal. He was advised to abstain from sexual contact until a test of cure, and was told that chlamydia testing would be repeated when samples could be sent ashore. No condoms were available to issue. "discharge resolved, abstinence advised"
- 14 May 2013 — During a second port visit from 10 to 14 May 2013 the veteran again had unprotected intercourse with a new casual partner after heavy drinking. Condoms had not been issued before either port visit and the canteen supply had run out. From 15 May 2013 he resumed a sexual relationship aboard with a female crew member. "further unprotected contact, port visit"
- 27 May 2013 — He presented with clear to mucoid urethral discharge and dysuria beginning on 26 May 2013. The medical officer recorded urethritis, probably chlamydial or post-gonococcal, and sent a first-void urine sample ashore for nucleic acid amplification testing. Doxycycline 100 mg twice daily for seven days was commenced. On 28 May 2013 his partner aboard was found to have chlamydial cervicitis on testing at a coalition medical facility during a port call. "urethritis, mucoid discharge, doxycycline"
- 30 May 2013 — After three days the ship's doxycycline supply ran out and resupply was delayed by the ship's operational program. His partner could not be treated until resupply, and they continued their sexual relationship. On 06 June 2013 the urine result returned positive for Chlamydia trachomatis and negative for Neisseria gonorrhoeae. "doxycycline exhausted, partner untreated"
- 12 Jun 2013 — The veteran presented with pain and swelling of the right testis and epididymis, fever of 38.4 degrees and persisting discharge. Right epididymo-orchitis complicating chlamydial urethritis was diagnosed. A repeat urine test sent ashore was positive for Chlamydia trachomatis and Mycoplasma genitalium. Resupplied doxycycline and later moxifloxacin were given, and his partner was treated at the same time. "right epididymo-orchitis, chlamydia positive"
- 20 Jun 2013 — Scrotal ultrasound at a coalition hospital during a port call confirmed right epididymo-orchitis with a reactive hydrocele and no abscess. The epididymitis settled slowly over six weeks. A test of cure on 05 August 2013 after return to Australia was negative for chlamydia and Mycoplasma genitalium. "right epididymitis, reactive hydrocele"
- 18 Feb 2014 — A urologist reviewed persisting right testicular and perineal pain and diagnosed chronic epididymitis and chronic pelvic pain following the 2013 infection. Semen analysis showed reduced sperm concentration and motility. "chronic epididymitis since 2013"
Symptoms
At onset the veteran had a clear to mucoid urethral discharge, dysuria, urethral itch and frequency. After the worsening he had severe right testicular and epididymal pain and swelling, fever and continuing discharge.
He now reports intermittent aching pain in the right testis and perineum, worse after prolonged sitting, exercise and ejaculation, and occasional dysuria. He is concerned about his fertility following the abnormal semen analysis.
Imaging
- 20 Jun 2013 — Ultrasound scrotum: "Enlarged, hyperaemic right epididymis with a thickened right testicular tunica and small reactive hydrocele, consistent with right epididymo-orchitis. No abscess or testicular torsion."
- 18 Feb 2014 — Ultrasound scrotum: "Persistent mild enlargement and heterogeneity of the right epididymal head, consistent with chronic epididymitis. Both testes normal in size."
Onset Date
The most likely date of onset of this condition is 26 May 2013.
At that date the veteran was serving aboard a frigate on warlike service in the Middle East Area of Operations, three weeks after treatment for gonococcal urethritis and twelve days after a second port visit, and was in a sexual relationship with a crew member who was found two days later to have chlamydial infection.
This date is appropriate because his review after ceftriaxone treatment on 12 May 2013 recorded resolution of the gonococcal discharge and no urethral symptoms, and at his presentation on 27 May 2013 he dated the new mucoid discharge and dysuria to 26 May 2013. The incubation period of chlamydial urethritis is about one to three weeks, consistent with exposures between 29 April and 19 May 2013.
For the 3-week factors, the 3 weeks before onset run from 05 May 2013 to 26 May 2013; the port visit contact of 10 to 14 May 2013, the contact with his partner aboard from 15 May 2013 and the ceftriaxone-only treatment on 05 May 2013 fall within it. For the 3-month factor, the 3 months before onset run from 26 Feb 2013 to 26 May 2013, covering contact with three new partners. For the 12-month factor, the 12 months before onset run from 26 May 2012 to 26 May 2013, within which gonococcal urethritis was diagnosed on 05 May 2013. He was aged 22 at onset.
For the worsening factors, the period after onset runs from 26 May 2013 to the documented worsening on 12 Jun 2013. During that period his doxycycline course was interrupted on 30 May 2013, he continued sexual contact with his untreated partner, and Mycoplasma genitalium co-infection was present.
1. What is the formal diagnosis of the condition claimed above?
The formal diagnosis is Chlamydial Urethritis (ICD-10-AM A56.0, chlamydial infection of the lower genitourinary tract). No Statement of Principles has been determined for this condition.
Chlamydial urethritis is a sexually transmitted infection of the urethra caused by Chlamydia trachomatis. In men it causes dysuria and a clear to mucoid urethral discharge one to three weeks after exposure, although many infections are asymptomatic. It often coexists with or follows gonorrhoea and is the commonest cause of post-gonococcal urethritis when gonorrhoea is treated without anti-chlamydial cover. Untreated or inadequately treated infection can ascend to cause epididymo-orchitis, and can trigger reactive arthritis, chronic pelvic pain and reduced fertility.
The infection was acquired on warlike service in the Middle East and began on 26 May 2013. It was confirmed by nucleic acid amplification testing on 06 June 2013 and worsened with right epididymo-orchitis on 12 June 2013.
2. For each diagnosis identified, please also provide the following dates:
When did the veteran first experience symptoms attributable to this condition?
26 May 2013.
When did the veteran first present to a health / medical provider for this condition?
27 May 2013.
When was the condition confirmed / formally diagnosed?
06 June 2013.
When did the veteran first present to you (or your practice) for this condition?
14 April 2025.
3. How was this diagnosis confirmed? i.e. what were the key symptoms and signs, investigation results, specialist opinions?
The diagnosis was confirmed by nucleic acid amplification testing of a first-void urine sample collected on 27 May 2013 and resulted on 06 June 2013, which was positive for Chlamydia trachomatis and negative for Neisseria gonorrhoeae. The clinical picture of mucoid urethral discharge and dysuria three weeks after treated gonorrhoea, the confirmed chlamydial infection in his sexual partner, and a repeat positive test on 12 June 2013 support the diagnosis.
The worsening was confirmed clinically on 12 June 2013 as right epididymo-orchitis, with ultrasound confirmation on 20 June 2013. A test of cure on 05 August 2013 was negative.
4. What do you consider to be the cause(s) of the condition in this veteran? Give consideration to constitutional and common risk factors, pre-existing injuries or diseases, and occupational or lifestyle risks, as well as direct causative mechanisms.
No Statement of Principles has been determined for chlamydial urethritis, so the claim is decided on the sound medical-scientific evidence of what causes the condition, without the limits of a Statement of Principles. The recognised causes below are drawn from the medical literature on the epidemiology and transmission of Chlamydia trachomatis, and each is addressed as it applies to the veteran.
Legislation: the clinical onset of this condition was on 26 May 2013, after 1 July 2004, during continuous full-time service. This is a Military Rehabilitation and Compensation Act 2004 (MRCA) claim. The reasonable hypothesis standard applies to the veteran's warlike service in the Middle East, where the infection was acquired and worsened, and the balance of probabilities standard applies to peacetime service. Each cause must be related to the person's service. Under the beneficial approach required by the legislation, the absence of documentation does not mean that an event or exposure did not occur: lack of evidence is not evidence of lack.
Recognised causes on the medical-scientific evidence (no Statement of Principles)
Causative factors
Cause 1: having unprotected sexual contact with a person infected with Chlamydia trachomatis within the 3 weeks before the clinical onset of chlamydial urethritis; — MET
- From 15 May 2013 the veteran had unprotected vaginal intercourse aboard the frigate with a female crew member who was found on 28 May 2013 to have chlamydial cervicitis on testing at a coalition medical facility. The contact occurred within the 3 weeks before onset on 26 May 2013, while both were on warlike service, and condoms were not available aboard.
Cause 2: having sexual contact with a new or casual partner, or with more than one partner, within the 3 months before the clinical onset of chlamydial urethritis; — MET
- Within the 3 months before onset, from 26 February to 26 May 2013, the veteran had sexual contact with two casual partners during the port visit of 25 to 29 April 2013, a further new casual partner during the port visit of 10 to 14 May 2013, and his partner aboard from 15 May 2013. All of these contacts occurred during rest and recreation on warlike service.
Cause 3: having sexual contact with a commercial sex worker within the 3 weeks before the clinical onset of chlamydial urethritis; — MET
- During the port visit of 10 to 14 May 2013, within the 3 weeks before onset, the veteran had unprotected intercourse with a woman he understood to be a commercial sex worker at an establishment near the port, as he had during the earlier visit in April. The medical officer recorded this history on 05 and 27 May 2013. The contact occurred during rest and recreation on warlike service.
Cause 4: being aged under 25 years at the time of the clinical onset of chlamydial urethritis; — MET
- The veteran was born on 11 September 1990 and was 22 years old at onset on 26 May 2013. Young adults under 25 have the highest incidence of chlamydial infection, reflecting both behaviour and greater biological susceptibility. His age and deployment as a junior sailor placed him in the group at highest risk.
Cause 5: having had another sexually transmitted infection within the 12 months before the clinical onset of chlamydial urethritis; — MET
- Gonococcal urethritis was diagnosed by the ship's medical officer on 05 May 2013 on warlike service, 21 days before onset and within the 12 months before it. A previous sexually transmitted infection is a strong marker of exposure and of concurrent undetected chlamydial infection.
Cause 6: being intoxicated with alcohol at the time of the sexual contact from which chlamydial urethritis was acquired; — MET
- During both port visits the veteran drank about 15 standard drinks a night and was intoxicated at the time of the sexual contacts, as he told the medical officer on 05 May 2013. Intoxication impaired his judgement about condom use. Heavy drinking on port visits after long periods at sea was part of the shipboard culture of the time.
Cause 7: having unprotected sexual contact in a region with a high prevalence of sexually transmitted infections, without access to barrier protection, within the 3 weeks before the clinical onset of chlamydial urethritis; — MET
- The port visits of April and May 2013 were to ports with a high recorded prevalence of sexually transmitted infections among commercial sex workers. No sexual health briefing was given and no condoms were issued before either visit, and the ship's canteen had run out. His unprotected contacts of 10 to 14 May 2013 fell within the 3 weeks before onset.
Cause 8: having gonococcal urethritis treated without concurrent anti-chlamydial therapy within the 3 weeks before the clinical onset of chlamydial urethritis; — MET
- On 05 May 2013 the veteran's gonococcal urethritis was treated with ceftriaxone alone because the ship had no azithromycin or doxycycline in stock, and the chlamydia test sample was lost in transit. Concurrent chlamydial infection, which accompanies gonorrhoea in a large proportion of cases, was therefore left untreated and declared itself as post-gonococcal urethritis 21 days later on 26 May 2013.
Worsening factors
Worsening 1: having an incomplete or interrupted course of appropriate antibiotic treatment before the clinical worsening of chlamydial urethritis; — MET
- The veteran's seven-day course of doxycycline, commenced on 27 May 2013, was stopped after three days on 30 May 2013 because the ship's supply was exhausted and resupply was delayed by the operational program. The infection persisted and ascended, causing right epididymo-orchitis on 12 June 2013.
Worsening 2: having continued unprotected sexual contact with an untreated infected partner after the clinical onset and before the clinical worsening of chlamydial urethritis; — MET
- The veteran's partner aboard, diagnosed with chlamydial cervicitis on 28 May 2013, could not be treated until doxycycline was resupplied, and the two continued their sexual relationship between 28 May and 12 June 2013 without condoms, which were unavailable aboard. Ongoing reinfection contributed to the persistence and ascent of the infection.
Worsening 3: having co-infection with Mycoplasma genitalium at the time of the clinical worsening of chlamydial urethritis; — MET
- The repeat urine test of 12 June 2013 was positive for both Chlamydia trachomatis and Mycoplasma genitalium. Mycoplasma genitalium is resistant to the short doxycycline course he received, and the co-infection, acquired from the same exposures on warlike service, contributed to the epididymo-orchitis.
Worsening 4: inability to obtain appropriate clinical management for chlamydial urethritis. — MET
- On warlike service the veteran could not obtain azithromycin or doxycycline when his gonorrhoea was treated on 05 May 2013, could not complete the doxycycline course started on 27 May 2013, had no on-board testing and waited ten days for results, and his partner could not be treated. The infection worsened to epididymo-orchitis on 12 June 2013. Under Brew v Repatriation Commission (1999) this is an inability to obtain appropriate clinical management.
The % contribution of the causes is 100% and significant.
Sequelae
The chlamydial urethritis was complicated by right epididymo-orchitis in June 2013, which progressed to chronic epididymitis and chronic pelvic pain diagnosed by a urologist on 18 February 2014, with reduced sperm concentration and motility on semen analysis. These are sequelae of the chlamydial urethritis.
Unintended Consequence
Met. The treatment of the veteran's gonococcal urethritis on 05 May 2013 with ceftriaxone alone, without the standard anti-chlamydial cover, because of the ship's limited pharmacy, left the concurrent chlamydial infection untreated. The resulting post-gonococcal chlamydial urethritis is an unintended consequence of treatment provided by the Commonwealth during his service.
Inability to Attain Appropriate Medical Management
MET. On warlike service aboard a frigate, the veteran's gonorrhoea was treated on 05 May 2013 without anti-chlamydial cover because none was in stock, the chlamydia sample was lost in transit, there was no on-board testing, his doxycycline course was cut short after three days on 30 May 2013 when supplies ran out, and his infected partner could not be treated until resupply. The infection ascended to cause right epididymo-orchitis on 12 June 2013. Applying the objective and subjective tests in Brew v Repatriation Commission (Full Federal Court, 10 September 1999, Merkel J), operational constraints that prevent standard treatment and partner treatment amount to an inability to obtain appropriate clinical management, and this contributed to the worsening.
5. Please provide a Health Summary and a medication / prescribing history.
See attached report.
References
- 15 Jan 2009, Entry medical examination, Navy recruiting medical officer
- 05 May 2013, Sick bay consultation record, Ship's medical officer
- 12 May 2013, Sick bay review record, Ship's medical officer
- 27 May 2013, Sick bay consultation record, Ship's medical officer
- 28 May 2013, Partner test result notification, Coalition medical facility
- 06 Jun 2013, Pathology report, Chlamydia and gonorrhoea nucleic acid amplification test
- 12 Jun 2013, Sick bay consultation record and pathology, Ship's medical officer
- 20 Jun 2013, Ultrasound scrotum, Coalition hospital radiologist
- 05 Aug 2013, Test of cure pathology, Medical Officer, Naval health centre
- 18 Feb 2014, Specialist report and ultrasound scrotum, Urologist and radiologist
