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Published on: March 31, 2022
[Contamination of expressed human milk by mycelial fungi]
Franz Reis Novak1, João Aprígio Guerra de Almeida, Manoel J S Santos
1Microbiologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ. novak@iff.fiocruz.br
Objective:
To characterize the genera of mycelial fungi detected in expressed human milk received at the human milk bank of Instituto Fernandes Figueira after home collection.
Methods:
We studied 821 expressed human milk samples randomly obtained from flasks filled by the donors at home. The possible presence of molds, yeasts and mesophilic microorganisms was investigated. A total of 48 strains of mycelial fungi were isolated from the human milk bank samples and identified through standard laboratory techniques.
Results:
Microbiological analysis revealed the occurrence of molds and yeasts in 43 samples (5.2%), with counts reaching 10(3) CFU/ml. The following microorganisms were identified: Aspergillus niger group (6.3%), Aspergillus sp. (4.2%), Paecilomyces sp. (12.6%), Penicillium sp. (60.4%), Rhizopus sp. (2.0%), and Syncephalastrum sp. (14.5%). Four samples showed the presence of more than one mycelial fungus type.
Conclusions:
The presence of molds and yeasts in human milk manually expressed at home suggests that the hygiene conditions of the collection site may contaminate milk. Thus, when hospitalized premature babies receive the raw product, it is very important to observe the collection, storage and transport conditions in order to avoid the presence and consequences of contaminants increase.
Insights
Mycelial fungi, including Penicillium and Aspergillus, were detected in expressed human milk collected at home. This highlights the importance of hygiene during milk collection, storage, and transport to protect infants.
Area of Science:
- Microbiology
- Mycology
- Food Safety
Context:
- Human milk is a vital source of nutrition for infants, especially premature babies.
- Home collection of expressed human milk for milk banks requires stringent hygiene protocols.
- Microbial contamination of human milk can pose health risks to vulnerable infants.
Purpose:
- To identify and characterize the genera of mycelial fungi present in expressed human milk collected at home.
- To assess the prevalence of fungal contamination in human milk samples intended for a human milk bank.
- To investigate the potential impact of home collection hygiene on milk microbial quality.
Summary:
- A study analyzed 821 expressed human milk samples collected by donors at home.
- Mycelial fungi were identified in 43 samples (5.2%), with Penicillium species being the most prevalent (60.4%).
- Other identified fungi included Syncephalastrum, Paecilomyces, Aspergillus niger group, Aspergillus sp., and Rhizopus sp.
Impact:
- Findings suggest that home collection practices can introduce fungal contamination into expressed human milk.
- Emphasizes the critical need for adherence to proper collection, storage, and transport guidelines to ensure milk safety.
- Highlights the potential risks of fungal contaminants in raw human milk fed to hospitalized premature infants.
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