Can bacteria grow in hot sauce? (possible reasons)

In this article, we will answer the following question: “Can bacteria grow in hot sauce?” and discuss in what cases bacteria can grow in hot sauce, the effect of ingredients in hot sauce in preventing bacteria from growing, if hot sauce can spoil and how to know if the hot sauce has gone bad.

Can bacteria grow in hot sauce?

Yes, bacteria can grow in hot sauce. Although not common, hot sauce may contain bacteria. This happens when hot sauce is not sufficiently acidified, especially in the case of homemade hot sauce (1).

Another possibility is the increase in the pH of the hot sauce during storage after being opened, which allows the growth of bacteria lactic acid bacteria can grow in hot sauce, as they survive a pH of 4.5.

However, spoilage by pathogenic bacteria is less common, and studies showed that the bacteria Salmonella enterica, Escherichia coli and Listeria monocytogenes could not survive in hot sauce of pH 3.2 (2).

Can hot sauce prevent bacterial growth?

Yes, hot sauce that is industrially produced and hot filled and has a pH low enough can prevent bacterial growth. In addition to the low pH, which is achieved by the presence of acetic acid or citric acid in its formulation (2), the hot sauce contains red pepper, which is a source of capsaicin, an antibacterial compound (3).

Acetic acid is used in the formulation of hot sauces and is considered one of the most effective food acidulants, especially due to its antimicrobial properties. Acetic acid is commonly found in vinegar and widely used to reduce microbial growth in foods, such as mayonnaise (4).

Capsaicin is an alkaloid found in red peppers and other peppers that possesses antibacterial properties against many strains of Gram-positive and Gram-negative bacteria. 

It is also the compound that gives the characteristic pungency of pepper and products produced with pepper. 

Can hot sauce spoil?

Yes, hot sauce can spoil. The growth of bacteria in hot sauce is rare and found in most cases in homemade hot sauces due to bad hygienic conditions, poor storage or incorrect formulation of the sauce, such as insufficient acidulation of the sauce (1).

However, hot sauce can spoil due to the growth of yeasts and moulds (2, 4). Yeasts and mould can grow in high-acid foods.

According to studies, hot sauces containing acid and jalapeño pepper produced without the addition of preservatives were found to spoil 10 days after production, despite the antimicrobial effect of the pepper and the acid (4).

Yeasts and moulds are responsible for two-thirds of the cases of spoilage of hot sauces and other acidified products (2).

What is the shelf life of hot sauce?

The shelf life of hot sauce is long when kept unopened. According to studies, hot sauce stored at room temperature (20 °C) had a shelf life of about 8 months.

The shelf life was limited especially due to loss of quality, such as altered texture and flavour rather than due to microbial growth, although yeasts and moulds were detectable after the period of storage (6).

Storage at lower temperatures is preferable to extend the shelf life of hot sauce and preserve its sensorial attributes. High temperatures of storage favour both chemical degradation and microbial growth.

Other FAQs about Sauces that you may be interested in.

Can sauces go out of date?

Can I freeze a jar of sauce?

How to know if the hot sauce has gone bad?

To know if the hot sauce has gone bad, you should be aware of the possible indications of spoilage in the hot sauce. Some of them are:

Growth of mould or yeasts, which causes changes in the odour or flavour, cloudiness, presence of flecks on the surface or formation of a biofilm. Fermentation and gas production, resulting in the bloating of the package is also possible (5).

In general, loss of flavour and other quality attributes occur during storage and therefore it is recommended to store the hot sauce in refrigerated temperatures to reduce the quality loss (6).

Conclusions

In this article, we answered the following question: “Can bacteria grow in hot sauce?” and discussed if hot sauce prevents bacterial growth and the effect of the ingredients in hot sauce in preventing bacterial growth, if hot sauce can spoil and how to know if a hot sauce has gone bad. 

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References

1.-

Draughon FA, Elahi M, McCarty IE. Microbial spoilage of Mexican-style sauces. Journal of food protection. 1981 Apr 1;44(4):284-7.

2.-

Lobo A, Zúñiga C, Worobo RW, Padilla-Zakour OI, Usaga J. Fate of spoilage and pathogenic microorganisms in acidified cold-filled hot pepper sauces. Journal of food protection. 2019 Oct 1;82(10):1736-43.

3.-

Füchtbauer S, Mousavi S, Bereswill S, Heimesaat MM. Antibacterial properties of capsaicin and its derivatives and their potential to fight antibiotic resistance–A literature survey. European Journal of Microbiology and Immunology. 2021 Mar 30;11(1):10-7.

4.-

Doyle MP. Compendium of the microbiological spoilage of foods and beverages. Springer Science & Business Media; 2009 Sep 23.

5.-

Rawat S. Food Spoilage: Microorganisms and their prevention. Asian journal of plant science and Research. 2015;5(4):47-56.

6.-

Rodiles‐López JO, García‐Rodríguez DA, Gómez‐Orozco SY, Tiwari DK, Coria‐Téllez AV. Food quality evaluation of accelerated shelf life of chili sauce using Fourier transform infrared spectroscopy and chemometrics. Journal of Food Processing and Preservation. 2020 Mar;44(3):e14350.