These bacteria are chemoorganotrophs, that is, they use chemical reactions to get energy from organic sources. This bacterium is found in both cold as well as warm-blooded animals, that includes humans. Salmonella are known to cause typhoid fever, paratyphoid fever as well as many other food borne illnesses. Bacterial infections are contagious and spread like wild-fire. You can yourself determine if your infection seems infectious or not. Stay at home and take plenty of rest to get healthy. Eat a healthy diet and maintain a strong immune system. X OUT Acne Most bacteria are opportunistic pathogens; thus, do not give them an opportunity to invade your body. Infections caused by bacteria are called bacterial infections. Lung infections are often of this type. Several lung diseases, such as tuberculosis, bacterial pneumonia, chronic bronchitis and asthma, are/can are caused by bacteria. One of the FAQs about bacterial infections is 'are they contagious?’ The answer is, it depends on the type of infection that affects you. Bacterial lung infection can cause severe health concerns if not treated early. A chronic lung infection is certainly one of the most dangerous ailments, as it gradually reduces the vital capacity of our lungs to take in oxygen. Causes There are several possible modes of bacterial entry into our body, primary of which is through air, i.e., our breath. Sometimes, bacterial infections are caused due to pollution or contamination of foods or drinks. Moist areas favor the growth of bacteria. Depending on an individual's immunity towards bacterial invasion, the body responds to bacterial infection. Inhaling pollutants, toxic gases, dust and other harmful substances weakens the lung capacity, makes our immune system weaker and hence, makes us susceptible to the onslaught of pathogens. Symptoms Bacterial lung infections are usually manifested through symptoms such as cough, chest pain, sore throat, fever, etc. 

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