Food sellers, protect yourselves and your customers against typhoid


  • Wellness Premium
  • Wednesday, 14 Apr 2021

Ahead of the Ramadan bazaars, traders are usually reminded how to prepare and handle food properly and hygienically, and to get a typhoid vaccine. — Photos: Filepic

Food-loving Malaysians will be making a beeline for Ramadan bazaars when they open nationwide in two days' time to take away their favourite delicacies.

Many new vendors will also be setting up stalls for the first time to boost their income.

Already, the Covid-19 pandemic has led to the birth of countless home-based and online food sellers as a new way of making a living.

Thus, it is important that food handlers are vaccinated against typhoid as early prevention is necessary to prevent an outbreak.

“Many first-time food handlers may not be aware of the dangers and severity of typhoid disease, but they must realise that it is their responsibility to protect themselves and their consumers by proactively vaccinating against typhoid.

“This vaccine-preventable disease is an acute illness that is highly contagious and infectious,” says Universiti Malaya Medical Centre consultant public health and occupational health physician Associate Professor Dr Marzuki Isahak.

In line with this, the Academy of Occupational and Environmental Medicine Malaysia (AOEMM) has partnered with Facebook group Caring Moms, to run a “Healthy Food Handlers, Food Safety Assured” health education campaign.

The intention is to urge home-grown food handlers to practise good hygiene when preparing and delivering food, and to maintain public confidence in the safety of their products.

Potentially deadly

Ramadan bazaars are popular all over the country as some of the foods sold here are only available once or twice a year.Ramadan bazaars are popular all over the country as some of the foods sold here are only available once or twice a year.

Typhoid is a systemic infection caused by a bacterium called Salmonella typhi.

An infected person can pass the bacteria out of their body in their faeces, or less commonly, in their urine.

If someone else eats food or drinks water that’s been contaminated with a small amount of infected faeces or urine, they can become infected with the bacteria and develop typhoid fever.

“The bacteria is transmitted through food contamination, i.e. food handlers go to the toilet and don’t wash their hands, then they prepare the food.

“The food is contaminated via faecal-oral transmission, i.e. the bacteria goes from the faeces into the mouth of another person,” says Assoc Prof Marzuki.

He points out that infection can also occur at different critical points, e.g. when using utensils that have not been properly cleaned.

Symptoms of the infection include fever, fatigue, headache, nausea, abdominal pain, constipation or diarrhoea, and rash.

Around 1-4% of patients infected with S. typhi are chronic carriers with no symptoms who carry the bacteria in their intestinal tract and gallbladder for months or years.

Therefore, they are capable of spreading the disease to others without even realising it.

If typhoid fever isn’t treated, the symptoms will continue to get worse over the following weeks and the risk of developing potentially deadly complications will increase.

About 10-15% of patients infected with S. typhi develop severe forms of typhoid fever characterised by persistent high fever, abdominal discomfort, malaise and headache.

The most common life-threatening complications following typhoid fever include overwhelming infection, pneumonia, intestinal bleeding and intestinal perforation.

Still fairly common

Always wash your hands properly after using the toilet and before eating. — 123rf.comAlways wash your hands properly after using the toilet and before eating. — 123rf.com

Globally, the World Health Organization (WHO) estimates the typhoid burden to range from 11 to 21 million cases, with approximately 128,000-161,000 deaths annually.

The majority of cases occur in South and South-East Asia, and sub-Saharan Africa, mainly affecting children and young adults.

According to “The Burden of Typhoid Fever in Klang Valley Malaysia 2011-2015” study published last year (2020) in the BMC Infectious Diseases open access journal, most typhoid fever cases in the Klang Valley were observed among men (55.6%), individuals aged 21 to 30 years (27.6%), Malaysians (86.3%) and individuals of Malay ethnicity (52.1%).

Despite rapid urbanisation and development, local transmission of typhoid is still prevalent in Klang Valley (78.9%).

Assoc Prof Marzuki, who is also the secretary of AOEMM, says: “Outbreaks from August to October 2015 showed 71 confirmed cases and this was mainly due to food handlers defaulting vaccinations.

“We are worried about this because they are capable of spreading the disease without knowing that they are carriers.

“Consumers at risk are those who always eat outside or patronise eateries with inadequate sanitation.”

While there is no data on typhoid infections during Ramadan, he says in the past, there have been sporadic cases in the Klang Valley.

If more than two cases occur from a similar source, it is considered an outbreak.

“Because there are a lot of new food handlers coming out during the fasting month, we estimate a higher risk of infection during this period, especially when there is a lack of access to clean water.

“Typhoid is treatable with antibiotics, but when we give these drugs too frequently, there is the emergence of antibiotic resistance.

“Vaccination is best,” he says.

The symptoms of typhoid and food poisoning can be similar, but usually, food poisoning symptoms are milder.

With food poisoning, you may get abdominal pain and diarrhoea, but with typhoid, it can be constipation.

Assoc Prof Marzuki says: “In the district health offices, whenever we receive a notification of diarrhoeal diseases, we do a proper investigation to find out the incubation period of the symptoms.

“For example, if the patient is having symptoms today, but the intake of outside food was seven days ago, we can figure out what would be the infectious agent from the incubation period.

“Sometimes, the incubation period for food poisoning is two to three days; for S. typhi, it can go up to seven days.

“To confirm what infection it is, we do faecal sampling.”

Offering protection

Public health medicine specialist and AOEMM council member Dr Anza Elias says, “Vaccination against typhoid is a requirement by law for home-based food businesses because it strengthens their customers’ confidence that the food they purchase has been prepared under safe and hygienic terms.

Local authorities can check if food vendors in public places have received their typhoid vaccination and are maintaining hygiene standards, but are unable to check food sellers operating from private homes. Local authorities can check if food vendors in public places have received their typhoid vaccination and are maintaining hygiene standards, but are unable to check food sellers operating from private homes.“All food handlers must be socially responsible and undergo food-handler training, a medical exam and vaccination.

“Secondly, they must maintain a high degree of personal cleanliness; those who are carriers of such diseases should not be allowed to handle food until they are cleared of the infection.”

Adds Assoc Prof Marzuki: “Even though you have recovered from the symptoms, there’s a possibility you might be a chronic carrier, which means that the bacteria is still in your body and can be transmitted to others.

“The patient needs to do continuous follow-ups via faecal sampling to ensure that he or she is typhoid negative.”

And yes, you can get typhoid repeatedly.

There is no data on the compliance rate among food handlers during Ramadan; however, local city or town councils usually come up with education campaigns and vaccinate the vendors before giving out licences for the bazaars.

“The health inspectors will go around conducting random inspections, and compounds are given for non-compliance,” he says.

However, it is difficult to monitor food handlers in private homes as many of them are not registered.

Dr Anza suggests the following steps for first-time food handlers:

  1. Register via the Health Minis-try’s Food Safety and Quality Division (FSQD) or Food Safety Information of Malaysia.
  2. Follow FSQD’s Food Handlers Course on basic hygiene requirements in the preparation, handling and distribution of food.
  3. Go to a general practitioner (GP) or municipal council with Typhoid Injection Units (Unit Suntikan Typhoid) and get your vaccination.
  4. If you have previously vaccinated against typhoid, re-vaccination is required once every three years.

The unconjugated Vi polysaccharide (ViCPS) anti-typhoid vaccine licensed for use has been recommended by the WHO since 2008 for the control of typhoid in endemic and epidemic settings.

A single injection ensures active immunisation and protection against typhoid fever in adults and children two years and above.

Immunity appears one to three weeks after the jab.

Preventing food rot

Food spoilage is caused by microbes.

With the explosion in home-based food businesses, it is crucial that these home cooks are vaccinated against typhoid and are maintaining strict food preparation standards. — AISYA JABARUDDINWith the explosion in home-based food businesses, it is crucial that these home cooks are vaccinated against typhoid and are maintaining strict food preparation standards. — AISYA JABARUDDINThe rate of spoilage depends on the ability of these microbes to grow and multiply, which is influenced by a range of factors including water, pH levels, oxygen and temperature, as well the physical structure of the food itself.

Assoc Prof Marzuki says there are several factors that can help control the growth of microorganisms.

“Food stored in temperatures ranging from 5°C to 63°C promotes the growth of microorganisms, so it’s best to keep food below or higher than these temperatures.

“The more the moisture, the more the growth of microorganisms – removing the moisture will control the microorganism growth.

“Also, bacteria will grow more rapidly when the pH of the food is neutral, so acidify the food by adding ingredients such as lemon or vinegar, like in pickles.

“Sometimes, if we add sugar and salt, it will also help increase the food’s shelf life,” he says.

Additionally, unrefrigerated and ground or sliced food will spoil quicker.

He says: “The longer you keep food at normal room temperature, the higher the chances of microorganisms growing.

“Rapid processing and rapid distribution of food is of utmost importance.”

Dr Anza’s advice to consumers is: “When you are buying food, look at the seller’s hands, nails and apron, cleanliness of the place, grading of the restaurant, etc.

“Don’t only judge the stall based on the appearance, but look carefully at the food too.

“Smell, and if possible, taste it first. If it has gone bad, don’t buy it or throw it away.”

Just like Covid-19, there is a stigma surrounding those who get typhoid.

“Those who get typhoid fever are not necessarily dirty people.

“Remember, the disease is caused by contaminated food,” says Dr Anza.

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