Antibiotics - Cephalosporins

Cephalosporins are a large group of broad-spectrum antibiotics, which can be used to treat a wide variety of bacterial infections, including meningitis, pneumonia, urinary tract infections, and sepsis.

These antibiotics get their name from Cephalosporium acremonium, a fungus from which they are derived.Now, cephalosporins belong to beta-lactam antibiotics, which means they have a beta-lactam ring in their core, and they mainly work by disrupting the synthesis of the peptidoglycan layer, a major component of bacterial cell walls.

This weakens the bacterial cell wall, ultimately killing the bacteria.Now, cephalosporins are typically classified into five generations, each being used to treat certain types of bacterial infections.

First-generation cephalosporins include cephalexin, which is administered orally; cefadroxil, which is administered orally and intravenously; and cefazolin, which is given intravenously and intramuscularly.

In general, first-generation cephalosporins are effective against most gram-positive bacteria, such as Staphylococci and Streptococci spp; as well as some gram-negative bacteria like Escherichia coli, Proteus mirabilis, and Klebsiella pneumonia.

So, first-generation cephalosporins are used to treat respiratory tract infections, urinary tract infections, some skin infections; and bone and joint infections.

They can also be given as surgical antibiotic prophylaxis, to prevent infections from spreading to deeper tissues during surgical operations.Next, second-generation cephalosporins include cefaclor and cefprozil which are administered orally; as well as cefotetan and cefoxitin, which are given intravenously and intramuscularly; and cefuroxime, which is given orally and intravenously.

Compared to the first generation, second-generation cephalosporins are less effective against Staphylococcus spp. Instead, they are more effective against certain types of gram-negative bacteria, such as Haemophilus influenzae, which can cause infections like otitis media, respiratory tract infections, or septicemia; as well as Bacteroides, which can causes infections like osteomyelitis, septic arthritis, and meningitis.Moving on, third-generation cephalosporins include ceftriaxone, cefotaxime, and ceftazidime, which are administered intravenously and intramuscularly; and cefixime, which is taken orally.

This group of antibiotics has some effectiveness against gram positive bacteria, such as Streptococcus pneumoniae, but far less than the first generation.

Instead, third-generation cephalosporins are effective against a large family of gram-negative bacteria known as Enterobacteriaceae, which include bacteria such as Escherichia coli, Proteus mirabilis, Klebsiella spp, Enterobacter spp, and Serratia spp.

They’re also effective against other gram negatives, such as Haemophilus influenzae and the Neisseria spp.This makes third-generation cephalosporins a perfect choice to use for the initial management of infections like meningitis and septicemia.

In addition, they can be used to treat infections like otitis media, pelvic inflammatory disease, or skin and soft tissue infections.Next, fourth-generation cephalosporins include cefepime, which is administered intravenously or intramuscularly.

This medication has some activity against Streptococcus pneumoniae and Staphylococcus spp, but is most effective against gram-negative bacteria, and can be used to treat infections involving the respiratory tract, urinary tract, skin, and intra-abdominal infections.

Finally, the main fifth-generation cephalosporin is ceftaroline, which is administered intravenously. It is most effective against gram-positive bacteria, and is mainly used to treat community-acquired pneumonia, and bacterial skin infections.

Common side effects associated with cephalosporins include headaches, dizziness, nausea, vomiting, and diarrhea. In addition, cephalosporins may disrupt the healthy intestinal flora, which can allow certain bacteria like Clostridioides difficile to survive and overgrow within the gastrointestinal tract, rarely but potentially leading to Clostridioides difficile infection or CDI for short.

Some clients may also develop a skin rash or injection site reactions, as well as hypersensitivity reactions like Stevens-Johnson syndrome or anaphylaxis.

Finally, some cephalosporins may cause serious side effects, such as seizures, renal failure, and electrolyte abnormalities like hyperkalemia, and hematologic side effects like anemia, neutropenia, and thrombocytopenia.Now, cephalosporins are contraindicated in clients who are allergic to any beta-lactam antibiotic, as well as in infants younger than 1 month.

Precautions should be taken during pregnancy and breastfeeding, as well as with elderly clients. In addition, these medications should be used with caution in clients with anemia or coagulation disorders.

Finally, additional precautions should be taken when administering cephalosporins to clients with gastrointestinal diseases, as well as those with renal disease or on dialysis.

Alright, when caring for a client who has been prescribed a cephalosporin like cefazolin in order to prevent a surgical site infection, first perform a baseline assessment, including weight, vital signs, and noting the presence of fever, as well as fluid intake and output.

Next, review their recent laboratory test results, including CBC, renal and hepatic function, and potassium levels.Next, explain to your client how the medication will help to prevent an infection from developing in their surgical incision.

Let them know that you will be administering the medication intravenously before their scheduled surgery, and that they will receive additional doses during and after surgery.

Then, reassure your client that you will be monitoring them closely for side effects, keeping a close eye on their blood count, fluid and electrolyte balance, liver enzymes, as well as for the presence of gastrointestinal disturbances like diarrhea.

. Okay, when preparing to administer cefazolin intravenously, ensure your client is adequately hydrated, and that they have a patent IV and an indwelling urinary catheter in place.

Then, confirm the ordered dosage and input the correct mL/hr to be administered by infusion pump. While your client is receiving the medication, be sure to monitor the insertion site closely for signs of extravasation, such as redness, puffiness, or blanching.

In addition, monitor their vital signs and urine output, as well as for signs of a hypersensitivity reaction, including an unusual rash or blister, throat tightness, difficulty swallowing, or shortness of breath.

Finally, after administration of cefazolin, continue to monitor their vital signs, CBC, electrolytes, and renal function postoperatively.

Additionally, evaluate for the therapeutic response by assessing your client’s surgical site, looking for any signs of infection, like drainage, redness, warmth, swelling, or pain in the affected area; as well as approximation of the surgical wound.Alright, as a quick recap… Cephalosporins are a class of broad-spectrum antibiotics used to treat bacterial infections and prevent surgical site infections.

These medications weaken the bacterial wall by disrupting the peptidoglycan layer, ultimately killing the bacteria. Because cephalosporins are effective on a large range of bacteria, they can lead to opportunistic infections by Clostridioides difficile or Candida spp.

They can also cause hypersensitivity reactions, renal failure, or hematologic abnormalities. When caring for a client receiving a cephalosporin, nursing considerations include performing a baseline assessment, monitoring for side effects, and evaluating for therapeutic response.

Client education is focused on what to expect during treatment and understanding side effects to watch out for. or candida species They can also cause hypersensitivity reactions renal failure or hematologic abnormalities when caring for a client receiving a cephalosporins Nursing considerations include performing a baseline assessment monitoring for side effects and evaluating for therapeutic response Client education is focused on what to expect during treatment and understanding side effects to watch out for