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Botulism...medical consulting

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In this page talks about ( Botulism...medical consulting ) It was sent to us on 05/08/2021 and was presented on 05/08/2021 and the last update on this page on 05/08/2021

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Symptoms of Botulism











The various forms of botulism cause many of the same symptoms:





Dry mouth




Blurred or double vision




Drooping eyelids




Difficulty focusing on nearby objects




Pupils that do not constrict normally when exposed to light




Slurred speech




Difficulty swallowing






Nerve damage by the toxins affects muscle strength but not sensation. Also the mind usually remains clear.



Because swallowing is difficult food or saliva may be inhaled (aspirated) into the lungs causing choking or gagging and increasing the risk of pneumonia (called aspiration pneumonia).



Typically after strength is lost in the muscles of the face and head strength is then gradually lost in the muscles of the arms and legs and in the muscles involved in breathing. Muscles become progressively weaker. Paralysis of breathing muscles can cause death if mechanical ventilation (use of a machine to assist breathing) is not provided.



In food-borne botulism symptoms develop suddenly usually 18 to 36 hours after toxins enter the body although symptoms can start as soon as 4 hours or as late as 8 days after ingesting the toxins. The more toxin ingested the sooner people become sick.



The first symptoms of food-borne botulism are often nausea vomiting stomach cramps and diarrhea. Over time many people become constipated. These digestive symptoms usually occur before muscles are affected. People with wound botulism do not have digestive symptoms.


Diagnosis of Botulism













Usually electromyography




When possible tests to detect toxins in food blood or stool






Doctors suspect botulism based on symptoms. However other disorders can cause similar symptoms so additional information is needed.



Electromyography (electrical stimulation of muscles and recording of their electrical activity) may be useful. In most cases of botulism electromyography shows abnormal muscle responses after electrical stimulation.



For food-borne botulism a likely food source provides a clue. For example when botulism occurs in two or more people who ate the same food prepared in the same place the diagnosis is clearer. The diagnosis is confirmed when the toxins are detected in the blood or when the bacteria or toxins are detected in a sample of stool. Toxins may also be identified in food that was eaten.



For wound botulism doctors ask whether people have had an injury that broke the skin. Doctors may inspect the skin for puncture marks suggesting use of an illicit drug. The diagnosis is confirmed when the toxins are detected in the blood or when the bacteria are detected in a culture of tissue from the wound.



Sometimes determining whether botulism developed from a wound or from food is impossible.


Prevention of Botulism













Thorough cooking or heating of food




Appropriate storage and handling of food






The spores of Clostridium botulinum are highly resistant to heat and may survive boiling for several hours. However the toxins are readily destroyed by heat. Stored foods can cause botulism if they were inadequately cooked before they were stored. The bacteria can produce some toxins at temperatures as low as 37.4° F (3° C) a typical refrigerator temperature so refrigerating food does not automatically make it safe.



The following measures can help prevent food-borne botulism:





Cooking food at 176° F (79.9° C) for 30 minutes which almost always destroys toxins




Discarding canned foods that are discolored or smell spoiled




Following the home-canning instructions from the Centers for Disease Control and Prevention (CDC)




Discarding cans that are swollen or leaking




Refrigerating homemade oils infused with garlic or herbs and throwing away any of these unused oils after 4 days




Keeping potatoes that have been baked in aluminum foil hot until served






If people are unsure whether a can should be discarded they can check it when they start to open it. Before making the first puncture they can place a few drops of water in the spot to be punctured. If water is expelled rather than sucked into the can when the can is punctured the can is contaminated and should be discarded.



Any food that may be contaminated should be disposed of carefully. Even tiny amounts of toxins ingested inhaled or absorbed through the eye or a break in the skin can cause serious illness. Skin contact should be avoided as much as possible and hands should be washed immediately after handling the food.



If a wound becomes infected promptly seeking medical attention can reduce the risk of wound botulism.


Treatment of Botulism













Sometimes activated charcoal to prevent absorption of toxin consumed in food




Antitoxin




For breathing problems use of a mechanical ventilator






If people think they may have botulism they should go to the hospital immediately. If botulism is diagnosed they are hospitalized and closely monitored.



Laboratory tests to confirm the diagnosis may be done but treatment cannot be delayed until the results are known. To help eliminate any unabsorbed toxin doctors may give activated charcoal by mouth or through a tube passed through the nose or mouth and into the stomach.



Vital signs (pulse breathing rate blood pressure and temperature) are measured often. If breathing problems begin people are transferred to an intensive care unit and may be temporarily placed on a mechanical ventilator. Such treatment has reduced the percentage of deaths due to botulism from about 70% in the early 1900s to less than 10%.



A substance that blocks the action of the toxins (antitoxin) is given as soon as possible after botulism has been diagnosed. It is most likely to help if given within 72 hours of when symptoms begin. The antitoxin may slow or stop further physical deterioration so that the body can heal itself over a period of months. However the antitoxin cannot undo damage already done. Also some people have a serious allergic (anaphylactic) reaction to the antitoxin which is derived from horse serum or they may develop serum sickness.



If needed people who cannot swallow can be fed through a thin plastic feeding tube (a nasogastric tube) inserted through the nose and down the throat.



If people have wound botulism the wound is thoroughly cleaned and dead tissue is removed. Then antibiotics such as penicillin and metronidazole are given by vein (intravenously).



Some people who recover from botulism feel tired and are short of breath for years afterward. They may need long-term physical therapy.


Causes of Botulism











Clostridium botulinum bacteria form dormant cells called spores. These dormant spores are present widely in the environment including in soil and in river and sea water. Like seeds spores can exist in a dormant state for many years and they are highly resistant to destruction for example by heat. When moisture and nutrients are present and oxygen is absent (as in the intestine or sealed jars or cans) the spores develop into active bacteria and produce toxins. Some toxins produced by Clostridium botulinum are not destroyed by stomach acid or the intestine’s protective enzymes.



Clostridium botulinum is common in the environment and spores can be transported by air. Occasionally cases of botulism result from ingesting or inhaling small amounts of soil or dust that contain spores. Also the toxin can be used as a weapon. Spores can also enter the body through the eyes or a break in the skin.



Botulism has rarely occurred after botulinum toxin injection for cosmetic reasons such as for wrinkles or medical reasons such as for migraine headaches.



However most cases result from eating food that contains the toxins.



There are different forms of botulism which have different causes. The most common forms are





Food-borne botulism




Wound botulism




Infant botulism




Food-borne botulism

Food-borne botulism occurs when people eat food contaminated with botulinum toxin produced by Clostridium botulinum bacteria. Food may be contaminated if it is inadequately cooked before it was stored.



The most common sources of food-borne botulism are





Home-canned foods particularly foods with a low acid content such as asparagus green beans beets and corn






Other sources include chopped garlic in oil chili peppers canned tomatoes foil-wrapped baked potatoes that have been left at room temperature too long and home-canned or fermented fish. However about 10% of outbreaks result from eating commercially prepared foods—most commonly vegetables fish fruits and condiments (such as salsa). Less commonly botulism results from eating beef milk products pork poultry or certain other foods.



Refrigerating food does not make food safe because Clostridia can produce some toxins at typical refrigerator temperatures.



Botulinum toxin enters the bloodstream from the small intestine and is carried to nerves. This toxin prevents nerves from sending signals to muscles.

Wound botulism

Wound botulism occurs when Clostridium botulinum contaminates a wound or is introduced into other tissues. Inside the wound the bacteria produce toxins that are absorbed into the bloodstream.



Injecting drugs with needles that are not sterilized can cause this type of botulism as can injecting contaminated heroin into a muscle or under the skin (skin popping).



simple explanation



Botulism is an uncommon life-threatening poisoning caused by toxins produced by the anaerobic bacteria Clostridium botulinum.


Botulism toxins usually consumed in food can weaken or paralyze muscles.


Botulism may begin with dry mouth difficulty swallowing and talking double vision and inability to focus the eyes or with digestive symptoms such as diarrhea vomiting and abdominal cramps.


Doctors examine samples of blood stool or tissue from a wound and electromyography may be done.


Careful food preparation and storage prevent botulism that is caused by eating contaminated food.


If people think they may have botulism they should go to the hospital immediately.


An antitoxin is used to prevent or slow the effects of the toxin.


Clostridium botulinum do not require oxygen to live. That is they are anaerobes.


The toxins that cause botulism which are the most potent poisons known can severely impair peripheral nerve function. Botulism toxins paralyze muscles by preventing nerves from releasing a chemical messenger (neurotransmitter) called acetylcholine. Acetylcholine interacts with receptors on muscles (at the neuromuscular junction) and stimulates muscles to contract.


In very small doses two types (A and B) of the botulism toxins can be used to relieve muscle spasms (because it reduces muscle activity) and to reduce wrinkles.


The toxins that cause botulism are the most potent known poisons.


In very small doses two types (A and B) of these toxins can be used to control muscle spasms and to reduce wrinkles.


(See also Overview of Clostridial Infections and Infant Botulism.)


Clostridium botulinum bacteria form dormant cells called spores. These dormant spores are present widely in the environment including in soil and in river and sea water. Like seeds spores can exist in a dormant state for many years and they are highly resistant to destruction for example by heat. When moisture and nutrients are present and oxygen is absent (as in the intestine or sealed jars or cans) the spores develop into active bacteria and produce toxins. Some toxins produced by Clostridium botulinum are not destroyed by stomach acid or the intestine’s protective enzymes.


Clostridium botulinum is common in the environment and spores can be transported by air. Occasionally cases of botulism result from ingesting or inhaling small amounts of soil or dust that contain spores. Also the toxin can be used as a weapon. Spores can also enter the body through the eyes or a break in the skin.


Botulism has rarely occurred after botulinum toxin injection for cosmetic reasons such as for wrinkles or medical reasons such as for migraine headaches.


However most cases result from eating food that contains the toxins.


There are different forms of botulism which have different causes. The most common forms are


Food-borne botulism


Wound botulism


Infant botulism


Food-borne botulism occurs when people eat food contaminated with botulinum toxin produced by Clostridium botulinum bacteria. Food may be contaminated if it is inadequately cooked before it was stored.


The most common sources of food-borne botulism are


Home-canned foods particularly foods with a low acid content such as asparagus green beans beets and corn


Other sources include chopped garlic in oil chili peppers canned tomatoes foil-wrapped baked potatoes that have been left at room temperature too long and home-canned or fermented fish. However about 10% of outbreaks result from eating commercially prepared foods—most commonly vegetables fish fruits and condiments (such as salsa). Less commonly botulism results from eating beef milk products pork poultry or certain other foods.


Refrigerating food does not make food safe because Clostridia can produce some toxins at typical refrigerator temperatures.


Botulinum toxin enters the bloodstream from the small intestine and is carried to nerves. This toxin prevents nerves from sending signals to muscles.


Wound botulism occurs when Clostridium botulinum contaminates a wound or is introduced into other tissues. Inside the wound the bacteria produce toxins that are absorbed into the bloodstream.


Injecting drugs with needles that are not sterilized can cause this type of botulism as can injecting contaminated heroin into a muscle or under the skin (skin popping).


The various forms of botulism cause many of the same symptoms:


Dry mouth


Blurred or double vision


Drooping eyelids


Difficulty focusing on nearby objects


Pupils that do not constrict normally when exposed to light


Slurred speech


Difficulty swallowing


Nerve damage by the toxins affects muscle strength but not sensation. Also the mind usually remains clear.


Because swallowing is difficult food or saliva may be inhaled (aspirated) into the lungs causing choking or gagging and increasing the risk of pneumonia (called aspiration pneumonia).


Typically after strength is lost in the muscles of the face and head strength is then gradually lost in the muscles of the arms and legs and in the muscles involved in breathing. Muscles become progressively weaker. Paralysis of breathing muscles can cause death if mechanical ventilation (use of a machine to assist breathing) is not provided.


In food-borne botulism symptoms develop suddenly usually 18 to 36 hours after toxins enter the body although symptoms can start as soon as 4 hours or as late as 8 days after ingesting the toxins. The more toxin ingested the sooner people become sick.


The first symptoms of food-borne botulism are often nausea vomiting stomach cramps and diarrhea. Over time many people become constipated. These digestive symptoms usually occur before muscles are affected. People with wound botulism do not have digestive symptoms.


Usually electromyography


When possible tests to detect toxins in food blood or stool


Doctors suspect botulism based on symptoms. However other disorders can cause similar symptoms so additional information is needed.


Electromyography (electrical stimulation of muscles and recording of their electrical activity) may be useful. In most cases of botulism electromyography shows abnormal muscle responses after electrical stimulation.


For food-borne botulism a likely food source provides a clue. For example when botulism occurs in two or more people who ate the same food prepared in the same place the diagnosis is clearer. The diagnosis is confirmed when the toxins are detected in the blood or when the bacteria or toxins are detected in a sample of stool. Toxins may also be identified in food that was eaten.


For wound botulism doctors ask whether people have had an injury that broke the skin. Doctors may inspect the skin for puncture marks suggesting use of an illicit drug. The diagnosis is confirmed when the toxins are detected in the blood or when the bacteria are detected in a culture of tissue from the wound.


Sometimes determining whether botulism developed from a wound or from food is impossible.


Thorough cooking or heating of food


Appropriate storage and handling of food


The spores of Clostridium botulinum are highly resistant to heat and may survive boiling for several hours. However the toxins are readily destroyed by heat. Stored foods can cause botulism if they were inadequately cooked before they were stored. The bacteria can produce some toxins at temperatures as low as 37.4° F (3° C) a typical refrigerator temperature so refrigerating food does not automatically make it safe.


The following measures can help prevent food-borne botulism:


Cooking food at 176° F (79.9° C) for 30 minutes which almost always destroys toxins


Discarding canned foods that are discolored or smell spoiled


Following the home-canning instructions from the Centers for Disease Control and Prevention (CDC)


Discarding cans that are swollen or leaking


Refrigerating homemade oils infused with garlic or herbs and throwing away any of these unused oils after 4 days


Keeping potatoes that have been baked in aluminum foil hot until served


If people are unsure whether a can should be discarded they can check it when they start to open it. Before making the first puncture they can place a few drops of water in the spot to be punctured. If water is expelled rather than sucked into the can when the can is punctured the can is contaminated and should be discarded.


Any food that may be contaminated should be disposed of carefully. Even tiny amounts of toxins ingested inhaled or absorbed through the eye or a break in the skin can cause serious illness. Skin contact should be avoided as much as possible and hands should be washed immediately after handling the food.


If a wound becomes infected promptly seeking medical attention can reduce the risk of wound botulism.


Sometimes activated charcoal to prevent absorption of toxin consumed in food


Antitoxin


For breathing problems use of a mechanical ventilator


If people think they may have botulism they should go to the hospital immediately. If botulism is diagnosed they are hospitalized and closely monitored.


Laboratory tests to confirm the diagnosis may be done but treatment cannot be delayed until the results are known. To help eliminate any unabsorbed toxin doctors may give activated charcoal by mouth or through a tube passed through the nose or mouth and into the stomach.


Vital signs (pulse breathing rate blood pressure and temperature) are measured often. If breathing problems begin people are transferred to an intensive care unit and may be temporarily placed on a mechanical ventilator. Such treatment has reduced the percentage of deaths due to botulism from about 70% in the early 1900s to less than 10%.


A substance that blocks the action of the toxins (antitoxin) is given as soon as possible after botulism has been diagnosed. It is most likely to help if given within 72 hours of when symptoms begin. The antitoxin may slow or stop further physical deterioration so that the body can heal itself over a period of months. However the antitoxin cannot undo damage already done. Also some people have a serious allergic (anaphylactic) reaction to the antitoxin which is derived from horse serum or they may develop serum sickness.


If needed people who cannot swallow can be fed through a thin plastic feeding tube (a nasogastric tube) inserted through the nose and down the throat.


If people have wound botulism the wound is thoroughly cleaned and dead tissue is removed. Then antibiotics such as penicillin and metronidazole are given by vein (intravenously).


Some people who recover from botulism feel tired and are short of breath for years afterward. They may need long-term physical therapy.
  • The Author: wikbe
 
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