Pneumonia I: Introduction
Pneumonia II: Pathophysiology
Pneumonia III: Complications and Assessment
Pneumonia V: Nursing management and Prevention
Atypical Pneumonia
Pneumonia I: Introduction
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Updated: Jul 11, 2026

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Published on: March 18, 2014
This case series reports two instances of bone infections caused by Aeromonas hydrophila in patients who were otherwise healthy. Both patients had injuries in freshwater lakes, and cultures confirmed the presence of this bacterium. The infections were treated with a combination of intravenous and oral antibiotics, and both patients improved. The study suggests that A. hydrophila should be considered as a possible cause of osteomyelitis in individuals with a history of freshwater exposure, even if they do not have weakened immune systems. These findings help expand the understanding of A. hydrophila's role in causing bone infections.
Area of Science:
Background:
Osteomyelitis is a bone infection that typically arises from bacterial pathogens. While many organisms are known to cause this condition, Aeromonas hydrophila is rarely implicated in such cases. Most reports of A. hydrophila infections involve individuals with weakened immune systems. However, the role of this bacterium in causing osteomyelitis in otherwise healthy individuals remains unclear. Prior research has shown that A. hydrophila is commonly found in freshwater environments. This raises the possibility that infections may occur after exposure to contaminated water. No prior work had resolved whether A. hydrophila could cause osteomyelitis in immunocompetent individuals. This gap motivated a closer examination of clinical cases involving freshwater trauma. Understanding the epidemiology of A. hydrophila infections can help guide diagnostic and treatment strategies in relevant settings.
Purpose Of The Study:
The aim of this case series was to document instances of A. hydrophila osteomyelitis in patients without known immunodeficiencies. The researchers sought to determine whether this organism could cause bone infections following trauma in normal hosts. They focused on patients who developed symptoms after freshwater exposure. The motivation for the study stemmed from the lack of prior reports on this specific clinical scenario. By analyzing clinical and microbiological data, the authors aimed to highlight the potential for A. hydrophila to cause osteomyelitis in immunocompetent individuals. The study also aimed to emphasize the importance of considering this pathogen in patients with a history of freshwater trauma. The researchers wanted to contribute to the understanding of A. hydrophila's clinical significance. Their findings could inform future diagnostic approaches in similar cases.
Main Methods:
The study involved two patients who presented with signs of acute osteomyelitis after traumatic injuries in freshwater lakes. Clinical histories were reviewed to determine the nature of their injuries and exposure. Microbiological cultures were performed to identify the causative organism. Both patients underwent a two-week course of intravenous antibiotics. They were then transitioned to oral tetracycline hydrochloride for continued treatment. The researchers evaluated the response to therapy and clinical outcomes. The cases were selected based on the presence of A. hydrophila in cultures and the absence of immunodeficiency. The approach focused on documenting the clinical course and treatment effectiveness. This method allowed for a detailed analysis of the infection's progression and management.
Main Results:
Both patients developed acute osteomyelitis following trauma in freshwater lakes. Cultures from the affected sites yielded A. hydrophila as the causative organism. The first patient received a two-week course of parenteral antibiotics. The second patient followed the same treatment regimen. Both patients were then transitioned to oral tetracycline hydrochloride. The treatment was completed in an outpatient setting. Clinical improvement was observed in both cases after the full course of therapy. These findings suggest that A. hydrophila can cause osteomyelitis in immunocompetent individuals. The response to treatment was favorable in both patients. The results indicate that this organism should be considered in similar clinical scenarios.
Conclusions:
The authors concluded that A. hydrophila can cause acute osteomyelitis in immunocompetent individuals. This finding expands the known clinical spectrum of this pathogen. The cases presented highlight the importance of considering A. hydrophila in patients with freshwater trauma. The response to treatment with parenteral antibiotics and oral tetracycline was effective. The researchers propose that this organism should be suspected in relevant epidemiological settings. No prior work had resolved whether A. hydrophila could cause such infections in normal hosts. The study provides evidence that this pathogen can lead to bone infections in otherwise healthy individuals. These conclusions are based on the clinical and microbiological findings in the two cases.
Yes, the study reports two cases of acute osteomyelitis caused by A. hydrophila in immunocompetent individuals.
Both patients received two weeks of parenteral antibiotics followed by oral tetracycline hydrochloride.
A. hydrophila is commonly found in freshwater lakes, making it a likely source of infection after traumatic exposure.
Microbiological cultures from the affected sites identified A. hydrophila as the causative organism.
Yes, both patients showed clinical improvement following the full course of antibiotics.
The authors suggest that A. hydrophila should be considered in patients with osteomyelitis and a history of freshwater trauma.