A composite six-year-old's sandpaper rash, a positive rapid strep test, weight-based amoxicillin capped at its maximum and a school return date make up NU580's Unit 9 case. Searches like "nu 580 unit 9 assignment example", "nu580 unit 9 sample" and "nu580 unit 9 example" land here.
Sandpaper on Her Trunk and a Positive Rapid Test: An Acute Illness Case Study of Scarlet Fever in a Six-Year-Old, With a Dose the Cap Decides
[Student Name]
Purdue University Global
NU580: FNP II - Primary Care of Children and Adolescents' Health
Unit 9 Acute Illness Case Study
[Instructor Name]
[Date]
The child is a composite; weights and doses are bracketed teaching values, not doses for any real child.
Presentation
[Ava], 6, a first-grader, has had a sore throat for two days and a fever to 39.1 C since yesterday. This morning her mother noticed a rash that started on her neck and spread to her chest and back. She has no cough, no runny nose and no hoarseness. She has a headache and a stomachache and ate little yesterday. No drug allergies; no medicines in the past two weeks.
Examination: temperature 39.1 C; tired but interactive. Tonsils enlarged with white exudate; palatal petechiae; tender anterior cervical nodes. Tongue red with prominent papillae. A fine, blanching, papular rash that feels like sandpaper, heavier in the skin folds of the elbows and groin, with a pale area around the mouth. No conjunctival injection, no swelling of the hands or feet, no cracked lips.
Differential
1. Scarlet fever from group A streptococcal pharyngitis. For: exudative pharyngitis, fever, tender nodes, no cough, a sandpaper rash accentuated in skin folds, a strawberry tongue, age 6. Leading.
2. Viral exanthem with viral pharyngitis. For: common. Against: no cough or coryza, and a rash with this texture and distribution.
3. Drug rash. Against: no recent medicines.
4. Kawasaki disease. For: fever, rash, red tongue. Against: Kawasaki disease requires fever for at least four or five days with specific other features, and two days of fever with exudative pharyngitis makes it unlikely, though it would be reconsidered if fever persisted.
Age matters here. Group A streptococcal pharyngitis peaks in school-age children, from about 5 to 15, and is uncommon under 3, which is why the 2012 IDSA guideline discourages routine testing in children younger than three without risk factors (Shulman et al., 2012).
Diagnostics
Clinical scores such as the Centor or McIsaac score, while useful for estimating likelihood, cannot confirm streptococcal pharyngitis in children, and testing is recommended when the clinical picture suggests it (Shulman et al., 2012). A rapid antigen detection test was done: positive. A positive rapid test is highly specific, so no throat culture is needed. Had it been negative, a throat culture would normally follow in a child, because rapid tests miss some cases and untreated streptococcal pharyngitis in children carries a small risk of rheumatic fever.
Management: Dose by Weight, Then the Cap
Amoxicillin is a first-line choice, with penicillin V as the traditional alternative; both remain effective, since group A streptococcus has not developed resistance to penicillin.
Calculation: [amoxicillin] [50 mg/kg] once daily, maximum [1000 mg] a day, for 10 days (Shulman et al., 2012). Her weight: [21] kg. 50 x 21 = [1050] mg. The maximum is 1000 mg. Her dose: [1000] mg once daily for 10 days.
The cap, not the formula, sets her dose. Once a child's weight-based dose exceeds the adult maximum, the maximum applies.
If she were allergic to penicillin: for a non-anaphylactic reaction, [cephalexin] [20 mg/kg] twice daily, maximum [500 mg] a dose, for 10 days; for an immediate or anaphylactic reaction, [clindamycin] or [azithromycin], with local resistance considered.
Symptom care: [acetaminophen] or [ibuprofen] by weight for comfort; fluids; soft foods.
Why Treat, Given That She Would Recover Anyway
Streptococcal pharyngitis usually resolves on its own within a week, even without antibiotics. Treatment is still recommended in children for three reasons. It shortens the illness by about a day and reduces her contagiousness quickly, which is why she can return to school sooner. It lowers the risk of suppurative complications such as peritonsillar abscess. And, most important historically, it prevents acute rheumatic fever, which can follow untreated infection by weeks and damage the heart valves; treatment started within nine days of symptom onset is effective for that purpose (Gerber et al., 2009). Rheumatic fever is now rare in the United States, but the treatment that prevents it is short, safe and inexpensive.
Why Not a Shorter Course
Ten days of amoxicillin remains the standard for streptococcal pharyngitis in the United States. Shorter courses of some other antibiotics have been studied, but the ten-day regimen is the one tied to rheumatic fever prevention in the evidence behind the guideline. Once-daily dosing, as in her plan, makes the ten days easier to complete than older three-times-daily regimens, and adherence is the practical problem, since most children feel well by the third day.
Follow-Up
School return: she may go back once twelve or more hours have passed since her first antibiotic dose and her fever has gone, per the AAP Red Book (American Academy of Pediatrics, 2024). With a first dose this afternoon, she can return the day after tomorrow if fever-free.
Household: family members with symptoms should be tested; asymptomatic contacts need no testing or treatment. Her toothbrush can be replaced after 24 hours of antibiotics.
Complications prompting reassessment: fever beyond 48 to 72 hours of antibiotics; worsening throat pain with difficulty opening the mouth, drooling or a muffled voice, which suggest peritonsillar abscess; joint pain or swelling, a new heart murmur or chest pain in the weeks after, which could signal acute rheumatic fever; dark or cola-colored urine or facial swelling one to three weeks later, which could signal poststreptococcal glomerulonephritis.
Completing the full ten days of antibiotics prevents rheumatic fever even though symptoms usually improve within a day or two (Gerber et al., 2009).
What Her Mother Was Told
The rash is part of the strep infection and will fade over about a week, sometimes followed by peeling on the fingers and toes, which is expected. The medicine is one dose a day, taken with or without food, for all ten days. The complications are rare, and the list tells her what to watch for. She asked whether [Ava]'s younger brother, who is three and has no symptoms, needs a test. The answer was no: children without symptoms do not need testing, and at three he is less likely to have streptococcal pharyngitis. If he develops a sore throat with fever and no cough, he should be seen. She also asked whether [Ava] could have a strep carrier state. Some children carry the bacteria without being ill, which is one reason testing is reserved for children with symptoms suggesting strep rather than every sore throat, and why a test of cure after treatment is not needed when she is well.
References
American Academy of Pediatrics. (2024). Red Book: 2024-2027 report of the Committee on Infectious Diseases (33rd ed.). American Academy of Pediatrics.
Gerber, M. A., Baltimore, R. S., Eaton, C. B., Gewitz, M., Rowley, A. H., Shulman, S. T., & Taubert, K. A. (2009). Prevention of rheumatic fever and diagnosis and treatment of acute streptococcal pharyngitis. Circulation, 119(11), 1541-1551. https://doi.org/10.1161/CIRCULATIONAHA.109.191959
Shulman, S. T., Bisno, A. L., Clegg, H. W., Gerber, M. A., Kaplan, E. L., Lee, G., Martin, J. M., & Van Beneden, C. (2012). Clinical practice guideline for the diagnosis and management of group A streptococcal pharyngitis: 2012 update by the Infectious Diseases Society of America. Clinical Infectious Diseases, 55(10), e86-e102. https://doi.org/10.1093/cid/cis629
How this NU580 Unit 9 example is structured
Age runs through every section. The differential explains that group A streptococcal pharyngitis peaks in school-age children and is uncommon under three, which is why the 2012 IDSA guideline discourages routine testing in the youngest children. The diagnostics section adds that clinical scores alone are not enough to diagnose strep in children, and that a negative rapid test in a child would normally be backed by a throat culture. Management is written as a calculation with every figure shown, since the weight-based dose overtaking the maximum is the teaching point: the cap, not the formula, sets her dose. An alternative for penicillin allergy is named with its own bracketed regimen. The follow-up section cites the AAP Red Book on school return and lists acute rheumatic fever and peritonsillar abscess as complications prompting reassessment.
Get an NU580 Unit 9 example written to your instructions
Acute illness prompts vary widely: otitis media, a rash, bronchiolitis, gastroenteritis or a urinary infection, often with a weight and age that change every dose. Send the Unit 9 case as written and its rubric; the composite study follows whichever guideline your course names, with every dose bracketed. The first custom sample is on us, returned within 24-48h. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
NU580 Unit 9 questions, answered
Why bracket every dose in a sample?
Brackets mark values that belong to the composite case, not recommendations for any real child. Doses depend on weight, age, product concentration and current references, so every figure should be verified against the source your course uses. The sample shows each calculation in full precisely so the method can be checked and applied to your own case data.
Should the case study include a differential for a clear diagnosis?
Usually, yes. Even when the answer seems obvious, rubrics in advanced practice courses tend to reward a short differential with reasons each alternative is less likely. Two or three serious alternatives, briefly ruled down, show judgment without padding. The sample includes Kawasaki disease for that reason, then explains why two days of fever makes it unlikely.
How recent must the guideline be?
Cite the current edition your course accepts. For streptococcal pharyngitis the 2012 IDSA guideline has long been the standard reference, and the AAP Red Book appears in regular editions, so name the one you used. If a newer guideline exists for your condition, graders expect it, and citing a superseded one is a common accuracy deduction.