Enterotoxin production by strains of Staphylococcus aureus isolated from animals and main in Nigeria

Adekeye, Dosu

doi:10.1016/0378-1135(80)90018-8

Cited by 11 publications

(13 citation statements)

References 10 publications

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“…These results agree with those obtained in sheep 60 CNS (22%) ( Table 1). The percentage of enterotoxigenic by HAjek (19) and and Gutidrrez et al (18) and in goats by De CPS isolated in this study was considerably higher than that Buyser et al (8) and Harvey and Gilmour (23), which seems reported for S. aureus strains isolated in different animals to suggest that staphylococcal strains isolated from sheep species (2,15,20,25,36,43) and higher than that reported and goats produce mainly SEC. The other enterotoxins for S. aureus strains in infected cow's milk (1,16,22,26,35), produced occurred in low percentages, especially SED, but it was similar to that reported by Hajek (19) and which was only synthesized by one strain of S. caprae in Gutierrez et al (18) for S. aureus strains isolated from combination with SEE (Table 2).…”

Section: Resultscontrasting

confidence: 54%

“…Several types of staphylococcal enterotoxins have been identified on a serological basis and are named SE A through E (SEA through SEE). Data regarding the enterotoxigenicity of staphylococcal strains isolated from healthy animals indicate that only a relatively small number of strains are enterotoxigenic (2,15,20,25,36,43). Studies of goats have focused on determining the enterotoxigenicity of Staphylococcus aureus isolated from normal or infected milk (8, 23), although staphylococci are usually found in the skin and mucosae of humans and other animals (27,32).…”

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confidence: 99%

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Enterotoxin production by staphylococci isolated from healthy goats

Valle

Gómez-Lucı́a

Píriz

et al. 1990

Appl Environ Microbiol

119

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The ability of 342 staphylococcal isolates from different anatomical sites in healthy goats to produce staphylococcal enterotoxins (SE) was investigated. SE were produced by 74.3% of the 70 coagulase-positive strains and by 22% of the coagulase-negative strains studied. Most enterotoxigenic strains were isolated from the skin of udders and teats and from milk. SEC was the SE type most frequently produced, either alone (67.9%) or in combination with others. Five coagulase-negative species not previously reported as SE producers were identified (Staphylococcus chromogenes, S. warneri, S. sciuri, S. saprophyticus, and S. lentus). SEA, SEB, and SEC were detected in the milk of 17 of the 133 healthy goats studied. These results suggest that the goat is an important reservoir of enterotoxigenic staphylococci, most of which produce SEC.

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Section: Resultscontrasting

confidence: 54%

mentioning

confidence: 99%

Enterotoxin production by staphylococci isolated from healthy goats

Valle

Gómez-Lucı́a

Píriz

et al. 1990

Appl Environ Microbiol

119

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“…5, October 2014 390 reported to be between 30 to 50%, some of which are SE producers [7]. It was reported that S. aureus isolated from animals are different from humans biotypes [34]. The human biotypes were isolates from nasal passages with the highest proportion of SE secretion.…”

Section: Discussionmentioning

confidence: 99%

“…Improper handling may inflict serious health problems. 1980and 1981to 2003," Journal of Clinical Microbiology, vol. 45, pp.…”

Section: Discussionmentioning

confidence: 99%

Staphylococcus aureus Contamination during Food Preparation, Processing and Handling

Al-Bahry¹,

Mahmoud²,

Al-Musharafi³

et al. 2014

IJCEA

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Abstract-Throughout the world, food processing and handling is a major problem leading to food poisoning and infection. A total of 480 samples was analyzed for Staphylococcus aureus contamination which resulted from food processing. Most of the isolates were taken from food-handlers using nasal swabs. The most contaminated food was chicken pastries, followed by egg sandwiches and spring rolls. Isolates from all samples produced virulence factors hemolysin, coagulase, DNase and enterotoxins. Five different enterotoxins (SEs) were isolated and identified from different samples. The detected SEs are SEA to SEE. Most the isolates secreted SEA followed by SEB. The strains were multiple-resistant to several antibiotics. Ampicillin and penicillin were the most resisted antibiotics. The value of this investigation is to generate awareness about the dangers of food processing and handling leading to infections by foodborne microbes which constitute a potential health risk for the consumers.Index Terms-Staphylococcus aureus, contamination, food products, food handlers. I. INTRODUCTIONFood processing is an important industry worldwide. One of the major problems threatening food industry is the contamination with foodborne microbes of human origin resulting from improper handling and processing. Microbial contamination reduces shelf life and food quality leading to food infection and poisoning outbreaks, some of which are life threatening. Continuous monitoring of food processing is essential to avoid potential health problems.Staphylococcus aureus is one of the major foodborne pathogens, frequently causing diseases globally as a result of food ingestion contaminated with staphylococcal toxin [1].S. aureus is characterized by its ability to produce enterotoxins [2], which are considered to be the main causative agents of staphylococcal food poisoning [1]. S. aureus are commonly found on the skin of mammals, birds and fomites [2]. Humans are considered to be the major source of staphylococcal food poisoning [3]. S. aureus is found in nasal passages, throat, hair and skin of carriers [2]. Food is usually contaminated from nasal secretions, sneezing, coughing and direct hand contact of infected carriers [4], [5].Three categories of S. aureus carriers have been Manuscript received November 9, 2013; revised February 21, 2014 recognized: persistent, intermittent (occasional) and never-carriers. Persistent carriers are infected with the same staphylococcal strain for months or even years. It was reported that 20% -35% are persistent carriers. In addition, intermittent carriers represent 40% -70%, while never-carriers are uninfected representing 10% -40% of the population [6], [7].S. aureus secretes several virulence factors and extracellular toxins of protein origin which contributes to the pathogenicity. It is the only species that produces beta hemolysin which lyse red blood cells at cold temperature [6].Unlike other foodborne illnesses, staphylococcal food poisoning occurs shortly after, 30 min to 8 hrs, food ingestion contamin...

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“…The reason cannot easily be explained; previous work in this area (Adekeye, 1980), however, indicated that more than one biotype of S. aureus can be found on a particular host species. It is therefore possible that some of the beta haemolytic isolates were of animal rather than human origin.…”

Section: Discussionmentioning

confidence: 93%

Frequency of isolation of enterotoxigenic staphylococci from milk of nursing mothers in Kaduna, Nigeria

Adekeye

Adesiyun

1984

J. Hyg.

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SUMMARYMilk samples from 251 nursing mothers were screened for enterotoxigenic staphylococci. The incidence of staphylococci in milk samples was 71-3 %. Two hundred and sixteen strains were isolated from 179 mothers. Eighty-six (39-8 %) of the 216 strains were found to be toxigenic. Enterotoxin type A (SEA) predominated, with 41 strains (19-0 %) elaborating it. Twenty-one strains (9 7 %) produced enterotoxin B (SEB) while only eight (3-7 %) produced enterotoxin C (SEC). Ten strains (4-6 %) produced all three types. Enterotoxigenic strains usually produced coagulase, thermonuclease and alpha haemolysin.In this series breast-feeding alone was more common than combined breast and bottle feeding, especially among mothers less than 30 years old. The incidence of reported infantile diarrhoea decreased with increasing age of the mother. Of 16 babies with diarrhoea, 10 (62-5 %) had mothers whose milk yielded staphylococci. Six ofthese were toxigenic. Although no direct relationship between enterotoxigenic staphylococci in the milk of nursing mothers and infantile diarrhoea could be demonstrated, these findings reveal a potential health risk to these infants.

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Enterotoxin production by strains of Staphylococcus aureus isolated from animals and main in Nigeria

Cited by 11 publications

References 10 publications

Enterotoxin production by staphylococci isolated from healthy goats

Enterotoxin production by staphylococci isolated from healthy goats

Staphylococcus aureus Contamination during Food Preparation, Processing and Handling

Frequency of isolation of enterotoxigenic staphylococci from milk of nursing mothers in Kaduna, Nigeria

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