histopathology – Page 4

Disseminated sporotrichosis caused by Sporothrix brasiliensis with testicular involvement

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This case report describes a rare fungal infection caused by Sporothrix brasiliensis in a 35-year-old man living with HIV/AIDS. The infection spread throughout his body, affecting his skin, lungs, brain, and testicles. Doctors initially thought the testicular involvement was cancer and removed the testicle, but lab tests confirmed it was a fungal infection. The patient was successfully treated with antifungal medications and remains disease-free one year later.

Saksenaea oblongispora Rhinosinusitis in Advanced HIV: A Rare and Lethal Mucormycosis

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A 32-year-old man with advanced HIV developed a severe fungal infection of his sinuses caused by a rare fungus called Saksenaea oblongispora, which typically doesn’t affect people with HIV. The patient presented with severe facial swelling that rapidly worsened, and despite doctors identifying the fungus through biopsies and lab tests, he did not receive antifungal treatment or surgery before his condition became critical. This is the first case of this particular fungal infection documented in sub-Saharan Africa and in HIV patients, highlighting how dangerous this rare infection can be and how challenging it is to diagnose quickly enough to save lives.

Sweet Pepper cv. Lai Lai Ripeness Stage Influences Susceptibility to Mycotoxinogenic Alternaria alternata Causing Black Mold

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This research shows that green and red peppers can both develop black mold caused by a fungus called Alternaria alternata, but at different rates depending on temperature. Red peppers are more susceptible to severe infection at room temperature, while both types are similarly affected during cold storage. Importantly, infected peppers can produce toxins harmful to human health, emphasizing the need for preventing fungal infection in pepper crops before harvest and storage.

Photo Quiz: Asteroid bodies in a skin biopsy of a farmer

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A farmer developed a chain of red nodules on his arm after a wrist injury, which was diagnosed as sporotrichosis, a fungal infection caused by Sporothrix globosa. The diagnosis was confirmed through tissue biopsy, which showed distinctive asteroid bodies – yeast cells surrounded by radiating material that represents the body’s immune response. The infection was successfully treated with oral potassium iodide over 6 months, resulting in complete healing.

Mixed Infection With Aspergillosis and Actinomycosis in the Maxillary Sinus: A Case Report

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A 74-year-old woman with diabetes and rheumatoid arthritis developed a rare dual infection in her maxillary sinus (a cavity above the teeth) caused by both a fungus (Aspergillus) and bacteria (Actinomyces). Imaging tests initially suggested only fungal infection, but surgery and tissue examination revealed both organisms were present. The patient was successfully treated with surgical removal of the infected material combined with antibiotics, leading to complete recovery.

Co-Infection of Pulmonary Aspergillosis and Cryptococcal Meningitis in an HIV-Positive Patient: A Case Report

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This case describes a man with undiagnosed HIV who developed two serious fungal infections at the same time: a lung infection caused by Aspergillus fungus and a brain infection caused by Cryptococcus fungus. His extremely low immune system (CD4 count of 41) made him vulnerable to multiple opportunistic infections. Despite treatment with antifungal medications, his condition worsened and he passed away, highlighting the dangers of late HIV diagnosis.

Favourable outcome of Fusarium prosthetic valve endocarditis in a patient with an Ebstein anomaly

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A 26-year-old woman with a congenital heart condition (Ebstein anomaly) received a replacement heart valve. Six months later, a rare fungal infection caused by Fusarium developed on the new valve, leading to lung complications. Through a combination of surgery to remove the infected valve and antifungal medications, particularly voriconazole, the patient recovered successfully. This case demonstrates that even life-threatening fungal heart infections can be treated with proper surgical intervention and targeted medication.

Disseminated Lichtheimia ramosa infection in a Japanese Black calf

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A young beef calf developed severe diarrhea and fever that did not respond to multiple antibiotics. The calf had an underdeveloped immune system (missing thymus gland) and was treated with many antibiotics and steroids, which weakened its immune system further. After death, examination revealed the calf had a widespread fungal infection caused by Lichtheimia ramosa in the liver and digestive tract, representing the first documented case of this type in Japanese Black cattle.

Necrotizing orbital infections: A comprehensive review

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Necrotizing orbital infections are serious, fast-spreading infections around the eye caused by bacteria, fungi, or viruses. These infections can cause vision loss and can be life-threatening, especially for people with weakened immune systems. Quick diagnosis and aggressive treatment with antibiotics or antifungal medications, combined with surgery to remove infected tissue, are essential to save sight and prevent death.

Chalkbrood Disease Caused by Ascosphaera apis in Honey Bees (Apis mellifera)—Morphological and Histological Changes in Infected Larvae

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Chalkbrood is a serious fungal disease that kills honeybee larvae, caused by the fungus Ascosphaera apis. This study examined exactly how the infection progresses by infecting larvae in controlled laboratory conditions and observing them over time under a microscope. The researchers found that once infected, larvae die very quickly within 3-7 days as the fungus spreads throughout their bodies, and the fungus continues to grow even after the larvae are dead, eventually forming visible spores on the dead larvae that spread the disease to other bees in the colony.

Research Keyword: histopathology