Review Article | Vol. 6, Issue 1 | Journal of Ophthalmology and Advance Research | Open Access |
Manifestations and Treatment of Ocular Coccidioidomycosis: A Review of Literature
Nicholas A Chartrand1, Muhammed Jaafar1, Alexander R Shusko2*
1Department of Ophthalmology, The University of Arizona College of Medicine, Phoenix, Phoenix, AZ, USA
2Department of Ophthalmology, Mayo Clinic Arizona, Scottsdale, AZ, USA
*Correspondence author: Alexander R Shusko, MD, Mayo Clinic Arizona, Department of Ophthalmology, 13400 East Shea Boulevard Scottsdale, AZ 85259, USA; Email: [email protected]
Citation: Chartrand NA, et al. Manifestations and Treatment of Ocular Coccidioidomycosis: A Review of Literature. J Ophthalmol Adv Res. 2025;6(1):1-12.
Copyright© 2025 by Chartrand NA, et al. All rights reserved. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Received 10 January, 2024 | Accepted 27 January, 2025 | Published 05 February, 2025 |
Abstract
Purpose of Review: This review aims to summarize the epidemiology, manifestations and treatment of ocular coccidioidomycosis, a rare yet significant fungal infection that can severely impair vision.
Recent Findings: “Recent” is misleading as cases of ocular Coccidioidomycosis are rare and not frequently reported. A comprehensive literature search was performed in PubMed, EMBASE and Medline to identify case reports and retrospective reviews about the ocular manifestations of coccidioidomycosis. We identified 52 articles encompassing 63 case reports and collected data including age, gender, presentation, diagnosis, treatment, outcome and Best Corrected Visual Acuity (BCVA) at presentation and after treatment. Articles reviewed spanned from 1948 through 2022.
Summary: Average patient age was 38.7 years old, 60.3% of patients were male, 31.7% were female and gender was not disclosed 7.9% of cases. 19.0% patients had a disseminated Coccidioides infection and 4.8% of patients were immunocompromised at the time of infection. Clinical presentations of ocular coccidioidomycosis included scleritis, granulomatous lesions of the lid and retina, uveitis and endophthalmitis. 15.9% of patients progressed to enucleation. Climate change is correlated with an increased incidence of Coccidioides infections. Clinicians must maintain a high degree of suspicion for ocular coccidioidomycosis.
Keywords: Coccidioides; Valley Fever; Uveitis; Fungal Infection; Ophthalmology
Abbreviations
BCVA: Best Corrected Visual Acuity; CF: Counting Fingers; HM: Hand Motion; LP: Light Perception; NLP: No Light Perception; SD: Standard Deviation
Introduction
Coccidioidomycosis, commonly known as Valley Fever, is an infection caused by the fungus Coccidioides immitis or Coccidioides posadasii [1]. While most cases of coccidioidomycosis are self-limited, ocular complications are a rare yet serious manifestation of the disease that can lead to permanent vision loss [2]. Unfortunately, ocular coccidioidomycosis is often under-diagnosed and under-treated outside of endemic areas, which can delay appropriate management and result in poor outcomes [1,3]. The ocular manifestations of coccidioidomycosis are diverse and can include scleritis, uveitis, granulomatous lesions of the eyelid and retina and endophthalmitis. Given the severity of these complications, it is crucial to recognize and treat them in a timely and appropriate manner. In this paper, we will review the cases of ocular coccidioidomycosis found in the literature and focus on the medical and surgical treatment options available to manage this rare and challenging condition.
Methods
A comprehensive literature review was conducted on the databases PubMed, Ovid MEDLINE and EMBASE. Keywords included coccidioidomycosis, valley fever, ocular, orbit, ophthalmology, uveitis, iritis, iridocyclitis, vitritis and chorioretinitis. A representative search strategy is included in supplement 1. Inclusion criteria consisted of peer-reviewed case reports, retrospective/prospective case studies and reviews containing ocular manifestations of coccidioidomycosis. Additional articles not indexed in searched databases were identified from citations of reviewed articles. Title and abstract review yielded 52 articles that met the stated inclusion criteria. The chronicity of coccidioidomycosis infection was determined by the authors of each respective paper. There was no general consensus on the timeframe for acute vs. chronic infection. Visual acuity was recorded only for the affected eye unless otherwise noted.
Best Corrected Visual Acuity (BCVA) for each case was converted into logMAR, with non-numerical BCVA (e.g., Counting Fingers [CF], Hand Motion [HM], Light Perception [LP] and No Light Perception [NLP]) conversion as follows based on published literature: CF – 2.1, HM – 2.4, LP – 2.7, NLP – 3.0 [4,5]. A paired t-test was used to evaluate the difference in mean BCVA at presentation and after treatment in the cases that provided data at both time points.
Results
We identified 52 articles containing 63 case reports of coccidioidomycosis with ocular involvement in the literature. Demographic data are summarized in Table 1. The average patient age was 38.7 years old (SD 18.5, range: 2 weeks – 77 years). 38/63 (60.3%) of patients were male, 20/63 (31.7%) were female and gender was not disclosed in 5 cases (7.9%). Ocular involvement was unilateral in 44/63 cases (69.8%) and bilateral in 19/63 cases (30.2%). Active coccidioidomycosis infection was present in 48/63 patients (76.2%), prior infection in 12/63 patients (19.0%) and no status of systemic infection was given for 3/63 patients (4.8%). 12/63 (19.0%) patients had a disseminated Coccidioides infection. Three patients (4.8%) were immunocompromised at the time of infection. For each case report of ocular coccidioidomycosis, supplement 1 summarizes the age, gender, location, diagnosis, laterality, time from onset of symptoms to presentation, disease dissemination, treatment, patient immune status, BCVA at presentation, BCVA after treatment and length of follow-up.
The BCVA of patients with ocular coccidioidomycosis at presentation and after treatment are plotted in Fig. 1. Among the 18 case reports that provided both initial and post-treatment BCVA values, a paired t-test revealed no significant difference between the mean initial BCVA (1.32 logMAR) and the mean post-treatment BCVA (1.51 logMAR), with a p-value of 0.33.
Table 2 shows the diagnoses associated with ocular coccidioidomycosis and the treatments used by diagnosis. The most common diagnosis was chorioretinitis, with 15 cases (23.8%) of granulomatous chorioretinitis and 12 cases (19.0%) of non-granulomatous chorioretinitis. Other diagnoses include unspecified anterior uveitis (3.2%), granulomatous anterior uveitis (14.3%), non-granulomatous anterior uveitis (1.6%), cutaneous coccidioidomycosis (17.5%), endophthalmitis (6.3%), granulomatous conjunctivitis (1.6%), panuveitis (3.2%), retinitis (1.6%) and scleritis/episcleritis (7.9%). Of medical treatments, 25 patients (39.7%) received IV amphotericin B, 4 (6.3%) received intraocular amphotericin B, 5 (7.9%) received an IV azole, 20 (31.7%) received an oral azole, 1 (1.6%) received an intraocular azole. Surgical treatments included vitrectomy in 3 patients (4.8%), cutaneous surgery in 2 patients (3.2%) and enucleation in 10 patients (15.9%).
Figure 1: BCVA at presentation and after treatment.
Total Cases | 63 |
Age (years) | 38.7 ± 18.5 (.038-77) |
Male | 38 (60.3%) |
Female | 20 (31.7%) |
Unknown Gender | 5 (7.9%) |
Immunocompromised | 3 (4.8%) |
Active Disease | 48 (76.2%) |
Past Disease | 12 (19.0%) |
Unclear Etiology | 3 (4.8%) |
Disseminated Disease | 12 (19.0%) |
Unilateral | 44 (69.8%) |
Bilateral | 19 (30.2%) |
BCVA Presentation (logMAR) | 0.914 ± 1.609 (0.00-3.00) |
BCVA After Treatment (logMAR) | 1.609 ± 1.602 (0.00-3.00) |
Table 1: Demographics.
Author | Year |
Location | Age | Gender | Ocular Diagnosis | Unilateral or Bilateral | Time from onset of symptoms until presentation | Disseminated Disease? | Immuno-compromised? | Successful Treatment | BCVA Presentation | BCVA After Treatment | Length of Follow-up |
Alexander20 | 1967 | Bakersfield, California | 19 | F | Chorioretinitis | Unilateral | 3 days | IV amphotericin B (total dose 4.3 g), prednisone. | CF | 10.5/200 | 16 weeks | ||
Bell21 | 1972 | California | 39 | M | Granulomatous anterior uveitis | Unilateral | 2 years | Enucleation | |||||
Bittencourt22 | 2022 | Irvine, CA | Cutaneous | Unilateral | Urgent orbitotomy with incision and drainage of the abscess, followed by oral fluconazole (100 mg/day for 4 months). | ||||||||
Blumenkranz23 | 1980 | San Joaquin Valley, California | 57 | M | Chorioretinitis | Unilateral | 6 weeks | Intrathecal miconazole therapy, 15 mg three times per week, followed by gradually increasing intravenous and intrathecal doses of amphotericin B. Intraventricular therapy with amphotericin B was also used, along with intrathecal administration of miconazole. | 20/20 | 3 months | |||
Blumenkranz | 1980 | San Joaquin Valley, California | 24 | M | Granulomatous chorioretinitis | Bilateral | 1 week | Amphotericin B therapy IV (total dose 1750 mg). | 20/50 | 20/30 | 11 months | ||
Blumenkranz24 | 1980 | Bakersfield, California | 40 | M | Chorioretinitis | Unilateral | 1 week | Incision and drainage of lid granuloma, intravenous and intrathecal amphotericin and miconazole for meningeal coccidioidomycosis. | 20/20 | ||||
Blumenkranz | 1980 | Bakersfield, California | 48 | M | Granulomatous chorioretinitis | Unilateral | 3 months | Intravenous and intrathecal amphotericin was initiated. The patient was subsequently given oral ketoconazole. The herpes was treated with topical idoxuridine, polysporin, and atropine 1%. | 20/70 | ||||
Boyden25 | 1971 | San Joaquin Valley, California | 28 | M | Chorioretinitis | Bilateral | 9 months | Y | |||||
Brown26 | 1957 | San Joaquin Valley, California | 19 | M | Chorioretinitis | Unilateral | 3 weeks | 20/200 | 4 months | ||||
Brown | 1958 | Houston, Texas | 24 | F | Granulomatous anterior uveitis | Unilateral | Y | Topical atropine and cortisone drops plus warm compresses. | |||||
Chandler27 | 1972 | Southwestern U.S. | 25 | M | Granulomatous chorioretinitis | Bilateral | 3 weeks | Y | Y | IV amphotericin B. | |||
Char28 | 2012 | Central Valley, California | 10 | F | Chorioretinitis | Unilateral | 1 month | Enucleation. | NLP | Enucleation | |||
Cheng29 | 2012 | Santa Clarita, California | 55 | M | Endophthalmitis | Unilateral | 1 month | Vitrectomy, intravitreal voriconazole, IV voriconazole 4mg/kg q12hr, after discharge oral voriconazole 4mg/kg BID | 20/60 | 20/25 | 4 months | ||
Coba30 | 2021 | 50 | M | Chorioretinitis | Bilateral | Y | 800mg fluconazole daily. | ||||||
Conan31 | 1950 | 30 | F | Retinitis | Unilateral | Y | None | ||||||
Cunningham32 | 1998 | San Joaquin Valley, California | 32 | M | Granulomatous anterior uveitis | Unilateral | 1 month | IV amphotericin B and oral fluconazole (outpatient) | 20/200 | ||||
Cunningham | 1998 | 31 | F | Granulomatous chorioretinitis | Bilateral | 5 months | IV and intrathecal amphotericin B for 3 weeks, followed by oral fluconazole | 20/20 | |||||
Cutler33 | 1978 | Southern California | 29 | M | Granulomatous anterior uveitis | Unilateral | 6 months | The patient was treated with intravenous amphotericin B, and an anterior-chamber injection of amphotericin. However, these treatments were unsuccessful in saving the eye, and the patient underwent enucleation. | LP | Enucleation | |||
Dworak34 | 2016 | Patient lived in Chicago and traveled through Southern U.S. | 33 | M | Cutaneous | Unilateral | 3 weeks | Oral itraconazole 200 mg twice a day and topical application of bacitracin/neomycin/polymyxin B ointment three times a day to the affected area for 10 weeks | 20/20 | ||||
Faulkner35 | 1962 | San Joaquin Valley, California | 33 | F | Cutaneous | Unilateral | 1 week | IV amphotericin B for 7 months. | 20/20, J1 | ||||
Gabriellan36 | 2010 | Arizona | 46 | M | Panuveitis | Bilateral | 7 months | Y | Voriconazole 200 mg PO QD | 20/40 OD, 20/25 OS | 20/25 OU | 2 weeks | |
Glasgow37 | 1987 | Logan, Arizona | 12 | F | Granulomatous chorioretinitis | Bilateral | 7 weeks | Y | |||||
Golden38 | 1986 | Arizona | 2 Weeks | Chorioretinitis | Unilateral | 7 weeks | 1mg/kg/day amphotericin B, 20 mg total administered | 20/20 | |||||
Green39 | 1967 | Arizona | 51 | M | Granulomatous chorioretinitis | Bilateral | 4 months | Amphotericin B 4.5 g IV, 4.2g intrathecally | |||||
Hwang40 | 2006 | California | 64 | M | Nongranulomatous anterior uveitis | Unilateral | 1 week | Prednisolone acetate 1% every hour and cyclopentolate hydrochloride 1% 3 times a day O.S. followed by brimonidine tartrate 0.15% 3 times a day O.S. | 20/30 | ||||
Irvine41 | 1968 | Lancaster, California | 73 | M | Cutaneous | Unilateral | 6 months | IV amphotericin B (1965 mg) | |||||
Jou42 | 1995 | 36 | M | Cutaneous | Unilateral | Amphotericin B 50mg QD for 3 weeks, fluconazole 800mg for maintenance after discharge. | 20/20 | ||||||
Lamer43 | 1982 | Bolivia | 26 | F | Granulomatous chorioretinitis | Unilateral | 2 months | Amphotericin B 20-50mg/day for 1 month. | 20/70 | 20/800 | 1 month | ||
Levitt44 | 1948 | British West Africa | 20 | M | Chorioretinitis | Unilateral | 2 weeks | None | 20/30 | ||||
Lijo-Pavia45 | 1949 | 28 | M | Cutaneous | Unilateral | 20/70 | 20/800 | ||||||
Ling18 | 2017 | Nevada | 33 | F | Endophthalmitis | Unilateral | 5 months | 3 intravitreal injections of amphotericin B, IV liposomal amphotericin B, fluconazole, oral Posaconazole, and 7 postop weekly intravitreal injections of amphotericin B, followed by surgical intervention consisting of temporary keratoprosthesis implantation, anterior segment reconstruction, removal of a cyclitic membrane and the crystalline lens, pars plana vitrectomy, pars plana Ahmed drainage device placed in the vitreous cavity, and penetrating keratoplasty. Transscleral cyclophotocoagulation was also performed to control IOP. | HM | 20/200 | 15 months | ||
Lovekin46 | 1951 | Arizona | 30 | F | Granulomatous chorioretinitis | Bilateral | 2 weeks | ||||||
Luttrull47 | 1995 | Southern California | 34 | M | Granulomatous anterior uveitis | Unilateral | 2 days | Oral fluconazole (200 mg) daily and IV amphotericin (systemic) on an increasing dose schedule was started. The iridocyclitis respond well and the vision was 20/20 within one week. after a month, serum creatinine concentration rose to 2.0 mg/dl and IV amphotericin was stopped at a total dose of 600 mg. Oral fluconazole was increased to 800 mg per day afterward (per day). Since then, pt constitutional symptoms improved within 48 hours and within one week choroidal lesion became inactive and a small atrophic chorioretinal scar was left. | 20/30 | 20/20 | 3 months | ||
Magrath48 | 2010 | 76 | F | Granulomatous chorioretinitis | Bilateral | Some improvement on fluconazole (400mg), then changed to voriconazole which gave her best results. | 20/100 OD, 20/40 OS | 20/60 OD, 20/20 OS | |||||
Maguire49 | 1994 | Southwestern U.S. | 65 | F | Granulomatous conjunctivitis | Unilateral | Topical amphotericin once every 2 hours and was then stopped after symptoms improved, and patient was kept on fluconazole only (400 mg twice a day). | 20/25 | |||||
Michelson50 | 1983 | Mesa, Arizona | 73 | M | Granulomatous chorioretinitis | Unilateral | 2 months | Patient was started on intrathecal amphotericin B after symptoms worsened but did not mention what happened afterwards. | 6/12-2 | ||||
Mondino51 | 2007 | 64 | M | Granulomatous anterior uveitis | Unilateral | Oral fluconazole, intravenous amphotericin B, pars plana vitrectomy and lensectomy, initially everything was normal. However, infiltrate reformed in the anterior chamber. Tissue plasminogen activator and intracameral amphotericin B were given, followed by another pars plana vitrectomy. At 1 month after the second vitrectomy, the eye was enucleated for intractable pain. | Enucleation | ||||||
Moorthy3 | 1994 | Southern California | 53 | F | Granulomatous anterior uveitis | Unilateral | 3 months | Enucleation | Enucleation | ||||
Moorthy | 1994 | Southern California | 45 | M | Granulomatous anterior uveitis | Unilateral | 3 weeks | Intracameral amphotericin B, and oral fluconazole 400 mg BID. | HM | CF | couple months | ||
Moorthy | 1994 | Southern California | 63 | M | Granulomatous anterior uveitis | Unilateral | 6 months | Oral itraconazole 200 mg daily. | CF | HM | |||
Nordstorm52 | 2019 | Southern California | 64 | M | Chorioretinitis | Unilateral | Enucleation | ||||||
Nordstorm | 2019 | Logan, Arizona | 12 | F | Chorioretinitis | Bilateral | Y | ||||||
Nordstorm | 2019 | 27 | M | Granulomatous chorioretinitis | Unilateral | At presentation | Y | Intravitreal amphotericin B deoxycholate 5micro g/0.1 ml every 3 days. | LP | ||||
Olavarria53 | 1971 | Bakersfield, California | 37 | M | Granulomatous chorioretinitis | Bilateral | At presentation | ||||||
Perry54 | 1960 | 56 | M | Cutaneous | Unilateral | Four months of amphotericin B therapy. | |||||||
Pettit55 | 1967 | San Fernando Valley, California | 41 | M | Anterior Uveitis | Unilateral | Several weeks | 20/300 | Enucleation | ||||
Quinlan56 | 2020 | Arizona | 40 | M | Granulomatous chorioretinitis | Unilateral | 1 day | Voriconazole 200 mg | |||||
Reed57 | 2021 | Southern California | 9 | M | Cutaneous | Unilateral | 10 days | IV amphotericin liposomal, and systemic fluconazole. | |||||
Reed19 | 2013 | Santa Clarita, California | 55 | M | Endophthalmitis | Unilateral | Diagnosed after 120 days | 16 intravitreal antifungal (amphotericin and voriconazole) injections and three vitrectomies, as well as lensectomy and penetrating keratoplasty. Patient was also on 350 mg twice daily of voriconazole and then was transitioned to 800 mg of oral fluconazole daily. | 20/200 | 20/25 | 13 months | ||
Rixford58 | 1896 | San Francisco, California | 40 | M | Endophthalmitis | Unilateral | 6 years | Enucleation | Enucleation | ||||
Shields59 | 2019 | Palo Alto, California | 34 | F | Chorioretinitis | Bilateral | Y | IV fluconazole and amphotericin B and then was transition to 200 mg of oral fluconazole per day. | 20/20 OU | ||||
Stone60 | 1993 | Seattle Washington, patient grew up in Arizona | 26 | M | Anterior Uveitis | Unilateral | 22 years | None | CF | Enucleation | |||
Toomey61 | 2019 | Southern California | 48 | F | Panuveitis | Unilateral | 3 weeks | Y | Intravenous fluconazole and intravitreal voriconazole. | HM | LP | 5 months | |
Trowbridge62 | 1952 | San Joaquin Valley, California | 22 | F | Cutaneous | Bilateral | 1 week | ||||||
Trowbridge | 1952 | San Joaquin Valley, California | 52 | F | Episcleritis | Bilateral | 4 weeks | 20/20 | |||||
Trowbridge | 1952 | San Joaquin Valley, California | 34 | M | Episcleritis | Bilateral | 1 month | 20/20 | 1 month | ||||
Trowbridge | 1952 | Fresno, California | Episcleritis | Bilateral | 3 days | ||||||||
Trowbridge | 1952 | Fresno, California | 18 | M | Episcleritis | Bilateral | At presentation | ||||||
Trowbridge | 1952 | Fresno, California | Scleritis | Unilateral | Y | ||||||||
Ugurlu63 | 2005 | Arizona | 77 | F | Cutaneous | Unilateral | 2 weeks | Y | Y | Oral fluconazole 400 mg BID and as symptoms improved, deceased to 200 mg BID and then 200 mg QD due to intolerance. Then switched to oral itraconazole. | 20/30 | ||
Vasconcelos-Santos64 | 2010 | Southern California | 64 | M | Granulomatous chorioretinitis | Unilateral | 18 months | Intravitreal amphotericin B and oral fluconazole. Led to phthisis, later required enucleation. | 20/400 | Enucleation | |||
Wood65 | 1967 | San Joaquin Valley, California | 12 | M | Cutaneous | Unilateral | At presentation | 20/20 | |||||
Zakka66 | 1978 | Los Angeles, California | 37 | M | Granulomatous chorioretinitis | Bilateral | 1 week |
Table 2: Summary of ocular coccidioidomycosis case presentations.
Diagnosis | Number of Cases | IV Amphotericin | IV Azole | Oral Azole | Vitrectomy | Intraocular Azole | Intraocular Amphotericin | Cutaneous surgery | Enucleation | Topical Steroids | No Treatment |
Anterior Uveitis | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
Chorioretinitis | 12 | 5 | 3 | 2 | 0 | 0 | 0 | 1 | 2 | 1 | 2 |
Cutaneous | 11 | 5 | 0 | 4 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
Endophthalmitis | 4 | 1 | 1 | 2 | 2 | 1 | 2 | 0 | 1 | 0 | 0 |
Granulomatous anterior uveitis | 9 | 5 | 0 | 5 | 1 | 0 | 1 | 0 | 4 | 1 | 2 |
Granulomatous chorioretinitis | 15 | 9 | 0 | 5 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
Granulomatous conjunctivitis | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Non-granulomatous anterior uveitis | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
Panuveitis | 2 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
Retinitis | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Scleritis/episcleritis | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Total | 63 | 25 | 5 | 20 | 3 | 2 | 4 | 2 | 9 | 3 | 6 |
Table 3: Summary of presentations and treatments for ocular coccidioidomycosis.
Discussion
Epidemiology of Coccidioidomycosis
Coccidioidomycosis is endemic to the arid and semi-arid regions of the southwestern United States, with California and Arizona accounting for the majority of reported cases in the country [6]. Outside of the United States, Valley Fever also affects parts of Mexico, Central and South America [7,8]. Coccidioidomycosis has two species in North American: C. immitis and C. posadaii. C. immitis is predominantly found in California while C. posadasii is found in other regions of United States. Phenotypically and clinically the two species are identical and can only be distinguished by molecular methods.
The incidence of coccidioidomycosis infections is increasing, with age-adjusted incidence rates increasing nearly 8 times from 2000-2018 in California [9]. The incidence of ocular involvement of Coccidioides infections is unknown, but disseminated coccidioidomycosis is estimated to occur in 0.5-2% of cases [10].
The geographic distribution of the disease may also be expanding in the United States, as more states face drought and extreme weather due to climate change [11]. Temperature is critical in both the mutation and development of the fungi, as it is hypothesized that Coccidioides ssp. thrive in dry and hot seasons by growing in the sterilized top layer of soil without competition from other microorganisms. For example, Washington state recently reported evidence of cases of coccidioidomycosis from strains endemic to the state, where it was not previously known to occur. A new niche for the fungi was already established or is establishing in Washington state. In addition to Washington, the incidence of coccidioidomycosis has been increasing in other Southwestern states such as Utah, New Mexico and Nevada [12-16].
Clinical Presentation and Diagnosis of Ocular Coccidioidomycosis
This study describes 63 case reports of ocular manifestations of coccidioidomycosis. While chorioretinitis was the most common manifestation of ocular coccidiomycosis representing 43% of patient presentations, the fungus can present as a wide variety of pathologies including cutaneous lesions, conjunctivitis, scleritis/episcleritis, uveitis and endophthalmitis. Active infection with the fungus was present in 76.2% of patients, while 19.0% of patients had a history of chronic infection. Therefore, coccidioidomycosis should be considered as a potential etiology for any new inflammatory ocular or orbital lesion in patients with a history of coccidioidomycosis infection or concomitant systemic symptoms indicative of pulmonary or disseminated infection, particularly among individuals residing in or recently visiting endemic regions.
Ocular manifestations of coccidioidomycosis are thought to result from hematogenous spread during disseminated fungal infection. Primary infection typically occurs through inhalation of the fungus, causing an acute pulmonary infection accompanied by fever and malaise that usually resolves spontaneously. However, chronic or disseminated infection may occur, especially in immunocompromised and pregnant patients, leading to spread of the fungus to the skin and bones. Conversely, some patients may present with only ocular symptoms, such as blurriness or inflammation, without any constitutional symptoms. This fact highlights the need to consider ocular coccidioidomycosis in the differential diagnosis of patients with ocular symptoms in an endemic region, even in the absence of other symptoms or signs of disseminated infection. It is especially crucial to consider this diagnosis in patients with a recent acute pulmonary infection, chronic unexplained cough or those who have recently traveled through an endemic area.
Diagnosis of Coccidioidomycosis is difficult as the systemic systems are ambiguous and requires a high degree of suspicion and knowledge from the clinician. General symptoms include cough, fatigue and fever but over half of Coccidioides infections are asymptomatic or minimally symptomatic. Other less common signs and symptoms include night sweats, rash, weight loss and headaches. Skin manifestations should raise suspicion for Coccidioides infection such as erythema nodosum and erythema multiforme.
Laboratory testing is crucial for proper diagnosis and treatment of Coccidioidomycosis. Serological testing includes Enzyme Immunoassay (EIA) for Immunoglobulin (Ig)M and (Ig)G. If the initial EIA is positive, many commercial tests will reflex to immunodiffusion antibody tests. EIA tests are more sensitive but less specific whereas immunodiffusion tests are less sensitive but more specific. Immunodiffusion testing can be quantified and expressed as a titer. Quantifiable data is useful for monitoring treatment response. Limitations of serologic include the development of serum antibodies against Coccidioides tends to trail symptoms by a few weeks. Negative EIA testing does not exclude Coccidioidomycosis and should be re-tested later if suspicion remains high or a diagnosis is not found. A common but frustrating situation arises when the EIA are positive, but the immunodiffusion is negative. Treatment should be based on the clinical picture and degree of suspicion for Coccidioidomycosis. Complement Fixation (CF) is another method to detect the presence of Coccidioidomycosis in fluids other than serum, such as CSF. CF provides a titer result that again is useful for monitoring response to treatment. Microscopic examination of bodily fluids, such as respiratory secretions or aqueous fluid, would also provide diagnostic evidence of Coccidioides infection. Culture of fluids for coccidioidomycosis are notoriously difficult to handle in an outpatient setting and is generally reserved for patients in a hospital setting. Lastly, Polymerase Chain Reaction (PCR) can be used and is highly specific for detection of Coccidioidomycosis.
The prognosis of infection is poor, with 15.9% of patients progressing to enucleation and most patients having decreased visual acuity after treatment. Although there was no significant difference in BCVA at presentation and post treatment, Fig. 1. shows a divergence of outcomes. Nearly all patients who presented with a visual acuity of 20/200 (logMAR 1.0) or better had an improvement in BCVA after treatment. On the other hand, most patients who presented with CF or worse vision remained with non-numerical visual acuity after treatment and many progressed to enucleation.
Treatment of Ocular Coccidioidomycosis
Treatment centers on quelling the proliferation of fungal material and minimizing the inflammatory response. The most common treatment identified in case reports was Amphotericin B, which licensed in the United States in 1959 [17]. Despite poor ocular penetration requiring high doses associated with significant side effects, such as nephrotoxicity, this was the primary treatment of systemic fungal infections until the later development of azole antifungals (Around the 1980s). Currently azoles, such as fluconazole, are now preferred due to excellent penetration into the eye and a more favorable side effect profile. Intraocular injection of antifungals was used less commonly but was the second line therapy for intraocular coccidioidomycosis. Surgical intervention is used sparingly as classic teaching says disruption of the eye leads to seeding of the fungus in an area that was previously unaffected. However, some cases successfully used a combined medical and surgical approach to treat complicated cases, such as endophthalmitis [18,19].
There is no standardized treatment for ocular coccidioidomycosis. The mainstay of treatment for systemic coccidioidomycosis is fluconazole. For treatment resistant or disseminated cases of ocular coccidioidomycosis, Posaconazole, which also has excellent intraocular penetration or Amphotericin B may be required for treatment. 27 patients (42.9%) with intraocular coccidioidomycosis in the review series had parenteral antifungals in addition to intraocular or surgical treatments. Cutaneous, periorbital coccidioidomycosis is treated well with fluconazole (4 patients 6.3%). Intraocular injection of antifungals agents such as voriconazole or amphotericin B are used in treatment resistant cases; 6 patients (9.5%) with intraocular coccidioidomycosis in the review series had intravitreal antifungals.
Surgical intervention for coccidioidomycosis is not performed routinely. Some experts believe coccidioidomycosis affects either the choroid and retina or the aqueous humor, but it is rarely present in both anatomical locations at the time of diagnosis due to the blood retinal barrier. It is theorized that surgical intervention allows for inoculation of fungal particles into all structures of the eye [1]. There are cases of successful combined medical and surgical management to remove foci of suspected coccidioidomycosis or vitrectomy to remove fungal particles.
Surgical intervention for coccidioidomycosis is not performed routinely. Some experts believe coccidioidomycosis affects either the choroid and retina or the aqueous humor, but it is rarely present in both anatomical locations at the time of diagnosis due to the blood retinal barrier. It is theorized that surgical intervention allows for inoculation of fungal particles into all structures of the eye [1]. There are cases of successful combined medical and surgical management to remove foci of suspected coccidioidomycosis or vitrectomy to remove fungal particles.
Key Points
- Coccidioidomycosis area of effect is growing as climate changes increase surface temperature
- High suspicion and knowledge of Coccidioidomycosis ophthalmic pathology is needed to arcuately diagnosis this blinding fungus
- Treatment courses are varied and require frequent observation and adjustment for extended periods of time
Conflict of Interest
The authors declare no potential conflicts of interest with respect to the research, authorship and/or publication of this article.
Acknowledgments
The authors declare they had no assistance with study design, data collection, data analysis or manuscript preparation.
Funding Details
No funding was received for this review. No other financial disclosures of all authors.
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Author Info
Nicholas A Chartrand1, Muhammed Jaafar1, Alexander R Shusko2*
1Department of Ophthalmology, The University of Arizona College of Medicine, Phoenix, Phoenix, AZ, USA
2Department of Ophthalmology, Mayo Clinic Arizona, Scottsdale, AZ, USA
*Correspondence author: Alexander R Shusko, MD, Mayo Clinic Arizona, Department of Ophthalmology, 13400 East Shea Boulevard Scottsdale, AZ 85259, USA; Email: [email protected]
Copyright
Nicholas A Chartrand1, Muhammed Jaafar1, Alexander R Shusko2*
1Department of Ophthalmology, The University of Arizona College of Medicine, Phoenix, Phoenix, AZ, USA
2Department of Ophthalmology, Mayo Clinic Arizona, Scottsdale, AZ, USA
*Correspondence author: Alexander R Shusko, MD, Mayo Clinic Arizona, Department of Ophthalmology, 13400 East Shea Boulevard Scottsdale, AZ 85259, USA; Email: [email protected]
Copyright© 2025 by Chartrand NA, et al. All rights reserved. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation
Citation: Chartrand NA, et al. Manifestations and Treatment of Ocular Coccidioidomycosis: A Review of Literature. J Ophthalmol Adv Res. 2025;6(1):1-12.